Flexi-liner Afcl, ALK User Manual

IMPORTANT: FLEXI-LINER HAS BEEN TESTED AND LISTED, USING ALL THE SUPPORTS,

SECTIONS, ETC., DESCRIBED HEREIN. DELETION OR MODIFICATION OF ANY OF
THE REQUIRED PARTS OR MATERIALS MAY SERIOUSLY IMPAIR THE SAFETY OF
YOUR INSTALLATION AND VOID THE CONDITIONS OF CERTIFICATION AND/OR
WARRANTY OF YOUR LINER.

Flexi-Liner

®

Installation Instructions

PLEASE READ AND UNDERSTAND THE REQUIREMENTS BEFORE PROCEEDING

1

Aluminum Flexible Chimney Liner

and Gas Vent Connector

IT IS OF THE UTMOST IMPORTANCE THAT THIS CHIMNEY LINER BE
INSTALLED ONLY IN ACCORDANCE WITH THESE INSTRUCTIONS.
PLEASE READ ALL INSTRUCTIONS BEFORE BEGINNING YOUR
INSTALLATION. FAILURE TO INSTALL THIS SYSTEM IN ACCORDANCE
WITH THESE INSTRUCTIONS WILL VOID THE CONDITIONS OF
CERTIFICATION AND THE MANUFACTURER’S WARRANTY. KEEP
THESE INSTRUCTIONS IN A SAFE PLACE FOR FUTURE USE.

For Installation into Masonry Chimneys

READ INSTRUCTIONS CAREFULLY BEFORE STARTING THE PROJECT. REMEMBER THAT SAFETY COMES FIRST.

OUR FLEXI-LINER®SYSTEM IS DESIGNED FOR INSTALLATION BY A QUALIFIED PERSON IN ACCORDANCE WITH LOCAL BUILDING CODES.

Types of Appliance

Flexi-Liner®is designed for use in existing masonry or
listed factory-built chimneys and vents as a chimney liner
for Category 1 listed gas-fired appliances equipped with
draft hoods and other gas appliances listed for use with
Type B Gas Vent that burn natural gas or propane, under
neutral or negative draft.

CAUTION: THIS ALUMINUM LINER IS NOT INTENDED FOR

SOLID OR LIQUID FUEL-BURNING APPLIANCES!

Sizes, Location & Clearances

Ensure your installation will conform with all federal and
municipal building code
requirements. Before
commencing installation,
CONTACT LOCAL GAS
UTILITY OR LOCAL
BUILDING OR FIRE
OFFICIALS ABOUT
RESTRICTIONS AND INSTALLATION IN YOUR AREA.
Obtain any necessary building permits. Authorities require
that the masonry chimney extend not less than three feet
above the highest point where it passes through the roof of
a building and not less than two feet above any portion of
the building within ten feet. (See Figure 1.)

Close attention should be given to determine the
correct connector size. Be sure to choose a size of

liner that is not less than that specified in the appliance
manufacturer’s instructions. Vent size recommendations

are detailed in the
CAN/CSA-B149.100 in
Canada or the National Fuel
Gas Code NFPA-54 in the
USA. As per the above Fuel
Gas Codes, all flexible

metallic chimney liners are
to be sized using Type B Gas Vent sizing tables, with
maximum capacities reduced by 20%. We have included
sizing information in the back of this instruction book for
flexible chimney liners.

Consult the appliance manufacturer’s installation
instructions regarding the maximum venting run allowed.

Model ALK/AFCL

UL1777
CAN/ULC-S635

2

Aluminum Flexible Chimney Liner and Gas Vent Connector Installation Instructions

Flexi-Liner

®

Your liner has been listed for installation at zero clearance
to the inside masonry surface of an existing masonry or
factory-built chimney and with zero clearance between the
outside surface of the masonry chimney and surrounding
combustibles.

Do not fill the airspace between the liner and chimney
with loose fill insulation or cement.

The Flexi-Liner and any Type B Gas Vent may be used in
any combination desired to complete the system.

When used as a Vent Connector, install with 1" (25mm)
minimum airspace clearance to combustibles.

At no time should an exposed portion of the Flexi-Liner
be enclosed or pass through any combustible area or
materials, such as walls, ceilings, floors, roofs, attics,
crawl spaces or joist areas, as this product is not listed
as Type B Gas Vent.

Use Type B Gas Vent or Flexi-Sleeve (sold separately) to
minimize condensation and down-drafting, particularly if:
a) The flue gas temperature is below 280°F at the entry

point into the liner.

b) Flexible Liner is to be installed in an exterior or

oversized chimney. An exterior chimney has one or
more sides exposed to the outdoors.

c) The liner system is venting only fan-assisted

appliances.

d) The masonry chimney contains solid or liquid fuel

residue from prior heating appliances.

e) The appliance is equipped with a vent damper.

Liner Components

The following parts are available for liner installation.

15' Flexible Liner Kit (3" to 5" only)
25' Flexible Chimney Liner Kit

35' Flexible Chimney Liner Kit
Kits include applicable length of Flexible Liner,
Support/Flashing assembly, Round Top, Mortar Guard,
screws and Installation Instructions.

Note: The 5.5" flex kit also includes a 5.5" to 6" Flexible

Connector.

The following additional parts are available.

Guide Cone (pull-down)

10' Extension Kit

Flexible Connector

B-Vent Adapter

Flexible Sleeve Insulation

Tools and Materials

The following tools and materials are needed.

Safety gloves
Eye protection
Ladder or scaffolding to reach the roof
Masonry drill bit ½" or

3

/8"

High speed drill bit

3

/

8"

Drill
Hacksaw
Screwdriver
Hammer
Pliers
Cold chisel
Tin snips
Caulking, exterior grade
Small bag of mortar mix
Trowel
Mortar pan
Piece of rope 10 feet longer than the chimney

CAUTION: Always wear gloves and eye protection

during installation to avoid personal injury.

Chimney Inspection and Cleaning

Make sure the masonry chimney is sound in construction,
clean, and free from all loose and potentially flammable
debris. If you find any cracked, loose, or missing bricks or
tiles, have them repaired or replaced.

Before the installation of the liner, it is recommended that
the chimney be cleaned by a certified chimney sweep.

Since chimneys are usually very sooty and dusty, it is
advisable to remove or cover your furniture, rugs, etc., for
the duration of the cleaning and installation of the liner.

Chimney Preparation

PREPARING FOR A STAND-ALONE APPLIANCE
INSTALLATION

If no opening currently exists, determine the location of the
point where the vent system will penetrate the masonry wall,
and prepare an opening through the masonry and any existing
clay liner (with a masonry drill bit, cold chisel and hammer)
large enough to accommodate the Mortar Guard, allowing for
the Flexible Liner to exit the chimney opening. The opening
must be located above the appliance outlet as high as possible
to maximize connector rise yet maintain the proper clearances
(see Figure 2a). It is recommended to install an inspection/
clean-out door on the opposite side if conditions permit.

PREPARING FOR AN INSERT

Before installing the venting system, ensure that the damper
plate is locked into the open position and secured or
removed to prevent any damage to the liner (see Figure 2b).

Note: Due to possible snagging, which may result in

some surface damage, caution must be observed
when lowering Liner lengths into the masonry flue.

PREPARING TOP OF CHIMNEY

Your chimney may have a clay-tile liner that protrudes
above the brick chimney. There is no need to remove the
top portion of the clay tile liner if it is in good condition.
You may want, at this time, to do any repairs to the
chimney crown if any cracks or deterioration are showing.
Once the repairs are done, follow the Flashing/Support
Installation - Masonry Chimney section on page 5.
If, on the other hand, the clay tile liner is not in good
condition, you will need to make it flush by chipping away
at the excess with a hammer, and cold chisel (see
Figure 3). Make sure that pieces of the clay tile liner don’t
fall into the flue. When you have finished making the top
of the chimney flush, fill in any cracks and uneven
surfaces with mortar.

Liner Preparation

DETERMINING LINER LENGTH

Determine the required length of the liner by measuring
the distance from the prepared opening to the top of the
chimney, allowing for a 90-degree bend at the inlet. If the
flexible liner will extend directly to the appliance, add the
distance from the appliance exhaust collar to the prepared
opening in the chimney flue, allowing for any required
bends. Multiple lengths may be joined, using the Flexible
Connector (see Figure 4).

3

Aluminum Flexible Chimney Liner and Gas Vent Connector Installation Instructions

Flexi-Liner

®

4

Aluminum Flexible Chimney Liner and Gas Vent Connector Installation Instructions

Flexi-Liner

®

TRIMMING THE LINER

Select the length(s) necessary to accommodate the
required distance determined above. Stretch the Flexible
Liner to the desired length (requires 2 people) by placing
both hands around the circumference of the ends of the
liner and gently pulling. If any Flexible Liner requires
cutting, use a sharp fine-toothed hacksaw.

CAUTION: Do not attach the Flexible Connector and use

it to stretch the liner. This may result in
damage to the Flexible Liner.

GUIDE CONE (PULL-DOWN ASSEMBLY)

A Guide Cone (Pull-Down) is available as an optional
installation aide. When attached to a rope, it is used to
pull and guide the end of the Flexible Liner through the
chimney. With one end of the rope, simply tie a knot
around the band of the Guide Cone. Attach the Guide
Cone to the flex by sliding it over the Flexible Liner and
inserting screws through the prepunched holes (see
Figure 5). Once the Flexible Liner has been lowered in its
final position, remove the Guide Cone.

Installing the Liner

STAND-ALONE APPLIANCE

Gather all necessary component parts and locate them
near the termination of the chimney. This should consist
of a Support/Flashing assembly, a Round Top, and the
prepared length of Flexible Liner complete with Guide
Cone and rope. Feed the Guide Cone and rope down the
chimney flue (see Figure 6). While an assistant gently
pulls on the rope from below, start lowering the Flexible
Liner down into the chimney flue. If additional lengths of
flex are required, join the sections together as the Flexible
Liner progresses down the chimney.

Note: Due to possible snagging, which may result in

some surface damage, caution must be observed
when lowering Liner lengths into the masonry flue.
After feeding the liner down the chimney to the
bottom, form a 90-degree bend and bring the
Flexible Liner through the prepared opening of the
chimney wall (see Figure 6).

For the liner to extend directly to the appliance, continue
to pull through the required amount of liner to allow a
proper connection to the appliance exhaust collar. Any
portion of liner used as a connector in a nearly horizontal
orientation should include a minimum slope of ¼" per foot
upward from the appliance toward the chimney.

5

Aluminum Flexible Chimney Liner and Gas Vent Connector Installation Instructions

Flexi-Liner

®

GAS FIREPLACE INSERT

Follow the Liner Preparation - Guide Cone (Pull-Down
Assembly section on page 4. Feed the liner down the

chimney until it exits through the masonry fireplace
opening (see Figure 7). Most gas fireplace inserts are
equipped with a removable draft hood for easy flex to
insert connection. Check the insert manufacturer’s
instructions for correct connection. Remove the Guide
Cone from the Flexible Liner.

Attach the Flexible Liner over the collar of the gas fireplace
insert (check the appliance manufacturer’s instructions for
proper attachment). Once the insert is in its proper place,
pull the excess Flexible Liner from the top of the chimney.

Flashing/Support Installation - Masonry Chimney

Position the Flashing and center the flat plate on top of
the clay tile. Mark the outline of the clay tile on the
underside of the flashing plate. There should be a
minimum of 2" (50mm) of overhang on each side of the
clay tile. Cut off each corner at 45° (see Figure 8), and
bend over the excess at the marked line, using a pair of
hand folders.

Round Top Installation - Masonry

Pull enough of the Flexible Liner through the Flashing/
Support assembly to be able to slide the Round Top into
the Flexible Liner (see Figures 9 and 10).

Slide the Round Top and Liner back through the
Flashing/Support assembly until the skirt of the Round
Top comes in contact with the collar of the Flashing/
Support assembly. Install the four (4) ¾" sheet metal
screws (provided) through the prepunched holes in the
Flashing collar (see Figure 9).

Note: For 5.5" Flex, the Round Top installs to the outside
of Flex, and must be fastened with screws.

6

Aluminum Flexible Chimney Liner and Gas Vent Connector Installation Instructions

Flexi-Liner

®

Place a wide bead of high-temperature silicone along the
entire top surface of the clay tile. Slide the Flex and
Flashing assembly back into the chimney opening until
the flashing plate comes to rest on the clay tile. Press the
flashing firmly into the silicone to create a good seal
(see Figure 10).

Round Top Installation - Existing Factory-Built
Chimney

One method is offered for the installation of Flexi-Liner in
an existing factory-built chimney.

Flexible Liner Kit with Liner Round Top

1. Remove existing chimney top and discard.

2. Center the Flashing/Support on the factory-built

chimney. Mark the outline of the factory-built chimney
on the underside of the Flashing/Support plate
(see Figure 11a). The flashing is then trimmed flush
with the outline, and secured in place from the top
with sheet metal screws once it is siliconed in place,
as per step 6.

3. As an alternative to step 2, to have an overhang, the

flashing/support is trimmed approximately 2" larger in
diameter than the marked outline (see Figure 11b). It
is then slit and folded to fit down over the chimney.
The screws are installed from the side once it is
siliconed in place, as per step 6.

4. Lower the flexible liner down through the factory-built

chimney to the desired position.

5. Place a wide bead of high-temperature silicone along

the entire top surface of the factory-built chimney.

6. Place the trimmed Flashing/Support over the Flexible

Liner. Lower the Flashing/Support so that the plate
comes to rest on the factory-built chimney. Press the
plate firmly into the silicone to create a good seal, and
secure into place with #8 x

3

/8" stainless sheet metal

screws, as per Figure 11b or 12.

7. Slide the Liner Round Top and the Flexible Liner back

through the Flashing/Support assembly until the skirt of
the Round Top comes in contact with the collar of the
Flashing/Support. Install the four (4) sheet metal screws
(provided), using the prepunched holes in the flashing
collar and through the flex and Round Top. Apply
silicone sealant to any exposed lances, holes or screws.

7

Aluminum Flexible Chimney Liner and Gas Vent Connector Installation Instructions

Flexi-Liner

®

Mortar Guard Installation

Back at the appliance, if you have not done so previously,
slide the Mortar Guard over the end of the Flexible Liner
protruding from the prepared opening. Position the Mortar
Guard within the prepared opening, such that it will
provide a protective barrier between the Liner and any
required filler material. Refer to the Installation
Completion section on page 8. Ensure that the end of
the mortar Guard, with the Listing Label attached, extends
into the room a minimum of 2" so that the label is visible
for inspection.

Appliance Connection

Final connection of the flexible liner to the appliance may
be made in a number of ways and will depend on specific
conditions.

TYPE B VENT CONNECTOR

If Type B Vent is recommended as a connector (if
clearances to combustibles or sizing guidelines suggest),
the Flexible Liner should extend at least 2" (50mm)
beyond the Mortar Guard.

FLEXIBLE LINER B-VENT ADAPTER

The Flexi-Liner universal B-Vent adapter connects
Flexible Liner pipe to all brands of Type B Gas Vent pipe.
To install:

1. Prior to installation, a Mortar Guard should be installed

within the prepared opening, such that it will provide a
protective barrier between the liner and any required
filler material. Ensure that the end of the Mortar Guard,
with the listing label attached, extends into the room a
minimum of 2" so that the label is visible for inspection
(refer to main instructions for additional details).

8

Aluminum Flexible Chimney Liner and Gas Vent Connector Installation Instructions

Flexi-Liner

®

2. The Flexible Liner should be installed such that it

extends at least 2" beyond the Mortar Guard, allowing
sufficient length for attaching the universal B Vent
adapter to the flex (see Figures 14 and 15).

3. Engage the outlet end of the universal B Vent adapter

with the flex pipe. Once fully engaged, secure the flex
to the adapter using four (4) self-tapping sheet metal
screws. Install the screws so that they penetrate
through the flexible liner and the inner liner of the
adapter (see Figure 16).

4. Engage the type B vent pipe with the universal B vent

adapter. Once fully engaged, tighten the machine
screw so that the adapter clamps down and secures
the B vent pipe in place (see Figure 17).

5. Refer to main instructions to complete installation.

SINGLE-WALL VENT CONNECTOR PIPE

Trim the Flexible Liner flush with the Mortar Guard. Insert
the end of a single-wall vent connector pipe (by others)
into the Flexible Liner. Secure into place with four (4)
evenly spaced screws through the Mortar Guard and into
the Flexible Liner and the vent connector (see Figure 18).

Note: The 5.5"-6" Flexible Connector is required when

connecting 6" single-wall pipe to the 5.5" flexible
liner.

When used as a single-wall vent connector, and if it is
acceptable, the Flexible Liner system may be extended all
the way to the appliances and installed with 1" (25mm)
airspace clearance to combustibles. Remember to
include a minimum of ¼" per foot rise in any horizontal
sections (from the appliance to the chimney) and keep
turns to a minimum (see Figure 18).

Installation Completion

After the appliance is correctly positioned and all the
venting connections are completed and checked for
proper installation (clearances to combustibles, proper
support and component parts), fill the void area around
the penetration hole with mortar. High-temperature
ceramic sealant or other noncombustible filler material
may be used as a substitute instead of mortar.

Final Inspection

Ensure all gas piping, electrical, and vent connections are
complete and up to code requirements. After adjusting
the appliance and lighting the main burner, allow a couple
of minutes for warm-up. Check the vent operation by
holding a lighted match or smoking material just under the
rim of the draft hood relief opening.

Proper venting will draw the flame or smoke into the draft
hood. Improper venting, indicated by escape or spillage
of burned gas, will cause smoke to move away from the
draft hood and a flame to flicker or go out.

Liner Maintenance

The Flexible Liner should be inspected by a qualified
heating or chimney technician before each heating
season to ensure it is free of debris and condensation and
that all components are in good condition. This can be
accomplished by removing the vent connector and looking
into the liner at its base.

The Round Top can be removed for inspection purposes
by removing the fastening screws. Again, have it
inspected by a qualified heating or chimney technician.

Reference

Upon completion of the installation, fill in the information
below and keep in a safe place for future reference.

Chimney Model: ________________________________

Installation Date: ________________________________

Dealer Name: __________________________________

Address: ______________________________________

City, Province/State: _____________________________

Technician`s Name: _____________________________

Technician`s
Certification Number: ____________________________

Address: ______________________________________

City, Province/State: _____________________________

“H”

15’

25’

30’

35’

45’

FLEXI-LINE R SIZER

®

Cor ruga ted Chimn ey Line r fo r Ga s F ired Appliances

SINGL E APPLIANCE

t, Ft
h
g

i
e

H

Double

Double

Double

Double

Double

r
o

t
c
e
n
n
o

C

“C”

Single

Single

Single

Single

Single

r
o

e

l

l

b

l

u

a

o

W

D

e

l
g
n

i

Type:

S

Offset

Lateral

“L”

2’
5’

10’

2’
5’

10’

2’
5’

10’

2’
5’

10’

2’
5’

10’

2’
5’

10’

2’
5’

10’

2’
5’

10’

2’
5’

10’

2’
5’

10’

FLEXI-LINER Diameter “D” (inches)

3” 4” 5” 5.5” 6” 7” 8”

Appliance Input Rating Limits (x1000 BTU/h)

FAN

Min Max

11

55

22

52

29

47

38

55

51

50

NA

NA

10

62

21

59

28

54

37

62

50

57

NA

NA

9

65

21

62

27

56

37

64

49

59

NA

NA

9

66

21

63

27

57

37

65

49

60

NA

NA

8

68

20

65

26

60

36

66

48

63

NA

NA

Reduced 20% from Type B Vent Tables

NAT

FAN

NAT

FAN

NAT

181
175
165

180
173
161

213
207
196

212
204
191

226
220
210

225
217
204

234
227
217

232
224
211

249
242
232

247
239
226

Max

120
114
108

119
112
105

140
134
128

139
132
126

148
141
137

146
138
134

152
146
141

151
143
138

161
155
148

160
153
145

FAN

Min Max

21

226

44

220

58

208

98

225

123

217

155

204

18

268

42

261

55

249

94

267

119

258

149

244

16

286

41

278

54

267

93

284

117

275

147

261

16

296

40

289

53

277

92

294

116

285

145

271

15

317

39

309

51

298

90

315

114

306

142

291

Max

38
36
33

38
35
31

43
41
38

42
40

NA

45
43
40

45
42

NA

46
NA
NA

46
NA
NA

48
NA
NA

48
NA
NA

Min Max

15

109

30

104

40

97

57

109

75

102

95

93

14

126

29

120

38

113

56

125

73

119

92

109

13

133

28

128

37

120

55

131

72

126

91

115

13

136

28

131

37

124

55

135

72

129

91

118

12

143

27

138

36

131

54

141

71

136

90

125

Max

74
70
66

74
69
63

85
82
76

84
80
74

90
86
82

89
85
78

92
89
84

91
87

NA

96
93
89

95
91

NA

Min Max

20
39
51

80
102
128

16

37

49

77

99
124

14

36

48

76

98
122

14

36

47

75

97
121

14

35

46

74

95
119

NAT

Max

150
144
137

149
143
134

176
170
162

175
168
159

186
180
173

185
178
170

192
186
178

190
184
175

203
197
190

201
195
186

FAN

Min Max

22

271

49

264

64

252

115

270

144

261

182

246

19

324

46

315

61

302

111

322

139

312

174

296

18

346

45

337

59

324

109

343

136

334

171

318

17

359

45

350

58

337

108

356

135

347

169

330

16

385

44

376

57

364

105

383

132

373

164

356

NAT

Max

180
174
166

179
174
162

212
206
196

211
204
192

224
218
209

223
217
206

231
225
216

230
224
213

244
239
231

243
237
227

FAN

Min Max

38

380

64

370

84

356

148

378

182

367

228

350

30

458

60

448

79

432

142

455

175

444

218

424

27

490

58

480

77

464

139

488

171

476

213

456

26

511

57

500

76

484

138

508

169

496

211

476

23

552

56

541

74

525

135

549

166

537

206

517

NAT

Max

253
240
230

251
238
227

296
289
277

294
286
273

315
308
297

314
306
294

325
319
308

324
316
304

346
340
330

344
337
325

FAN

Min Max

45

506

76

496

99

480

187

505

231

493

284

474

37

615

71

603

93

585

179

612

220

599

271

577

33

661

69

649

91

630

175

658

215

645

265

622

31

691

68

679

90

660

173

688

212

674

262

651

28

750

66

738

87

719

170

747

207

733

256

709

NAT

Max

331
322
309

330
320
305

402
394
380

400
391
375

428
419
406

426
417
401

444
435
422

442
433
417

476
468
455

474
465
450

MULTIPLE APPLIANCES

r
o

t

l

l

c

r

e
n
n
o

C

“C”

o
e

l
b
u
o

Type

D

a
W

Combined Appliance Input Rating Limits (x1000 BTU/h)

e

l
g
n

i
S

FAN

Only

100

“H”

t, Ft
h
g

i
e

H

Double

15’

Single

Double

97

116

25’

Single

Double

111

122

30’

Single

Double

116

125

35’

Single

Double

119

131

45’

Single

See Rigid Connector Sizing Table below for Multiple Appliance Systems

124

FLEXI-LINER Diameter “D” (inches)

Reduced 20% from Vertical Common Vent

NAT

FAN

NAT&

90

86

104

100

110

106

113

109

119

114

Only

73

70

88

84

94

90

97

93

104

99

FAN

Only

156

151

184

178

195

189

202

195

216

208

FAN

NAT&

131

127

157

152

168

162

175

168

188

180

NAT

Only

115

112

138

135

148

144

154

150

165

161

FAN

Only

191

186

227

220

242

235

252

243

271

261

FAN

NAT&

157

152

189

183

203

196

212

204

230

220

NAT

Only

140

136

168

163

181

175

188

182

202

195

FAN

Only

226

220

270

262

289

280

301

291

325

314

FAN

NAT&

182

177

221

214

238

229

249

239

271

260

165

160

198

192

213

206

222

214

239

229

NAT

Only

7”4” 5” 5.5” 6” 8”

FAN

FAN

Only

NAT&

342

282

333

274

409

341

398

332

438

367

426

357

457

385

444

374

494

420

480

407

NAT

Only

224

219

268

261

288

279

301

291

326

316

FAN

Only

445

435

537

524

576

562

603

588

656

640

FAN

NAT&

355

347

434

423

468

456

492

479

541

526

NAT

Only

292

286

350

342

376

367

392

382

424

413

Flexi-Liner® 9

Aluminum Flexible Chimney Liner and Gas Vent Connector Installation Instructions

RIGID CONNECTOR - SIZING INFORMATION

VENT CONNECTOR CAPACITIES

FOR MULTIPLE CATEGORY 1 APPLIANCES CONNECTED TO A COMMON VENT

System
Height,

Ft

15

25

30

35

45

Connector

Type:

Double or

Single Wall

Double

Single

Double

Single

Double

Single

Double

Single

Double

Single

3"

Connector

Rise, Ft

1 21 50 30 33 89 53 47 142 83 64 220 120
2 22 53 35 35 96 63 49 153 99 66 235 142
3 24 55 40 36 102 71 51 163 111 68 248 160
1 NA NA 29 79 87 52 116 138 81 177 214 116
2 NA NA 34 83 94 62 121 150 97 185 230 138
3 NA NA 39 87 100 70 127 160 109 193 243 157
1 21 58 32 32 106 58 46 169 90 61 267 130
2 22 61 38 34 112 68 48 179 107 63 279 154
3 23 63 43 35 117 77 49 187 120 65 290 173
1 48 58 31 78 104 56 114 164 87 172 258 125
2 52 61 37 82 109 66 119 174 104 180 271 148
3 55 63 41 86 113 74 124 183 117 188 282 168
1 20 62 33 31 113 59 45 181 93 60 288 134
2 21 64 39 33 118 70 47 190 110 62 299 158
3 22 66 44 34 123 79 48 198 124 64 309 178
1 47 60 31 77 110 57 112 175 89 169 278 129
2 51 62 37 81 115 67 117 185 106 177 290 152
3 54 64 42 85 119 76 122 193 120 185 300 172
1 20 64 34 31 118 60 45 190 95 59 303 137
2 21 66 40 33 123 72 47 198 112 61 314 162
3 22 68 45 34 128 81 48 206 127 63 323 182
1 47 62 32 77 115 58 111 183 91 167 293 131
2 51 64 38 81 119 68 116 193 108 175 304 155
3 54 66 43 85 123 78 121 200 121 183 313 176
1 19 69 35 30 128 63 44 207 99 58 334 142
2 21 71 42 32 132 75 46 215 117 60 343 169
3 22 73 47 33 137 84 47 221 132 62 352 190
1 46 67 33 76 124 59 110 199 94 164 322 135
2 50 69 39 80 128 71 115 208 111 172 331 161
3 53 70 44 84 132 81 120 214 122 180 340 183

Fan Fan Fan

Min Max Max Min Max Max Min Max Max Min Max Max

Nat Nat Nat Nat

4" 5"

6"

Fan

NA means "Not Allowed"

10

Flexi-Liner®

SINGLE APPLIANCE

D

= Diameter

C

= Connector

H

= Height

L

= Lateral

D

MULTIPLE APPLIANCES

L = Manifold Lateral

M

(Shall be less than or
equal to 18 x )D

D

H

Appliance

H

L

C

Appliance

C

Appliance

1

L

M

2

G EN ERAL VEN TIN G REQ UIREMEN TS

A1 . The a ir spa ce a round an installe d Flexi- Liner System must not be used to vent other

appliances.

Fle xi- Liner

A2 . A System venting more tha n one a ppliance sha ll not be smalle r in dia me ter

than the outlet of the largest appliance being served.

A3 . For single a pplia nce installa tions, the System may be sma ller in diameter tha n

the outlet of the a pplia nce be ing served, pr oviding:

a) the vent height is at lea st10ft.
b) the liner size is not more tha n one size sma ller.
c) the "FAN M AX" is reduced by 10 %if the a pplia nce is "fan assisted".
d) the outlet is la rger than 4" if the appliance is "natura l draft".

A4 . Reduce capa city for e lbows (turns) a s follows:

Fle xi- Liner

A4 .1. Single Appliance (

In U SA

a) - for ea ch additional elbow up to 45 º, reduce ca pacity by 5%.

two 90º elbows for tota l vent system a re factored into cha rt)

- for e a ch a dditiona l elbow 45 º- 90º, reduce ca pacity by 10 %.

In C DA

b) - for e a ch a dditiona l elbow 90 º reduce capacity by 1 0% for N AT a nd 1 5%

for FAN .

A4 .2. Multiple Appliances (

In U SA

a) - for each elbow in the common vent up to 45º, r educe capacity by 5%.

90º turn at the bottom of liner is fa ctored into cha rt)

- for each elbow 4 5 º - 9 0 º , reduce ca pacity by 1 0 %.

In C DA

b) - for each 90 º elbow in the common vent, reduce capa city by 1 0% for N AT

and 1 5% for FAN .

Common Vent manifold fitting is part of the connector sizing coming to it.

A5 . D o not use these tables if the ve nt system contains a ny device (such a s a vent damper,

dra ft regula tor or hea t recla imer, etc.), which retards the flow of vent gases. Refer to
instructions provide d by the ma nufa cturer of the device for vent instructions.

A6 . I nterpola tion betwee n the table entries is permitted, extrapolation beyond the table

entries is not permitted.

A7 . Vent connector sizes for multiple appliances are derived from tables included in the following
national gas codes: N FPA 54 (USA) and B149.1 (CDA).

These tables are derived from the National Fuel Gas Code (NFPA 54 & CSA-B149). Current

A8.

code data and information will supercede these sizing instructions if there is any discrepency
between them.

Fle xi- Liner

Flexi-Liner®

AD D ITIO N AL C O MMEN TS

Fle xi- Liner

B1 . System is U L/ULC Listed for relining existing masonry or fa ctory-built chimneys

and vents serving C ategory I na tural ga s or propane fired appliances.

B2 . Insula ting of System is a benefit to the insta llation but not a lways e ssential to

effective operation of this venting system. Consult the Flexi- Sleeve installa tion
instructions for application guide lines.

B3 . The use of a "Y" fitting rather than a "T" fitting is re comme nded when common venting into

a manifold system.

B4 . AVO ID C O NDEN SATIO N and/ or SPILLAG E O F FLUE G AS ES :

a) Install as per insta llation instructions.

b) Set up applia nces a s per a ppliance installation instructions.
B5 . C onta ctloca l authorities for restrictions and re gula tions in your a re a .
B6 . Ve nting ga s fire d a ppliances into ma sonry chimneys is prohibited, unle ss a Listed liner

such a s or a tile liner conforming to C ode is utilized. O versized, misa ligned
and/ or cra cked tile s DO N OT constitute a C ode line r.

Fle xi- Liner

Fle xi- Liner

Fle xi- Liner,

Printed in C an ada

11

Aluminum Flexible Chimney Liner and Gas Vent Connector Installation Instructions

Index

Types of Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Sizes, Location & Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Liner Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Chimney Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Chimney Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Preparing for a Stand-Alone Appliance Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Preparing for a Insert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Preparing Top of Chimney . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Liner Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Determining Liner Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Trimming the Liner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Guide Cone (Pull-Down Assembly) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Installing the Liner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Stand-Alone Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Gas Fireplace Insert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Flashing/Support Installation - Masonry Chimney . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Round Top Installation - Masonry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Round Top Installation - Existing Factory-Built Chimney . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Mortar Guard Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Appliance Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Type B Vent Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Flexible Liner B-Vent Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Single-Wall Vent Connector Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Installation Completion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Final Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Sizing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-11

12

©2009 Flexi-Liner All rights reserved Form No. 851419 10/20/2009 Printed in U.S.A