Greenheck IG-108 User Manual

Indirect Gas-Fired

Technical Guide

May

2005

TYPICAL

SPECIFICATIONS

H & V

CONTROLS

MUA

CONTROLS

FILTERS

DIFFUSERS

FURNACE

VENTING

MODEL IGX

DATA

MODEL IG

DATA

Table of Contents

Model Name Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Technical Guide: Heat Exchange Material Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Technical Guide: S-tube Furnace Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Model IG or IGX? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Model IG Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Model IG Unit Dimensions and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Model IG Roof Curbs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Model IG Evaporative Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Model IGX Performance Data & Motor Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Model IGX Unit Dimensions and Weights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-12

Model IGX Roof Curbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Model IGX Evaporative Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Model IGX DX and Chilled Water Cooling Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Furnace Venting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-17

Weatherhood & Filter Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Diffuser Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Make-Up Air Furnace and Temperature Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Technical Guide: Furnace Control and Turndown Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Make-Up Air - Air Flow and Evaporative Cooling Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Industrial Make-Up Air Temperature Control Recommendation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

TSCP Industrial Type Remote Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Commercial Kitchen Make-Up Air Temperature Control Recommendation . . . . . . . . . . . . . . . . . . . . . . . . 25

Make-Up Air Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Heating & Ventilating Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-30

IG Typical Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

IGX Typical Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

IG-HV Typical Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

IGX-HV Typical Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Make-Up Air Product Selection Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Indirect Gas Furnace is ETL and cETL listed to ANSI Z83.8-2002

Indirect Gas Units are listed to UL1995.

Both are harmonized standards between USA and Canada

Model Name Description

IGX–115–H22

Model (X indicates

modular construction)

Blower Quantity

Blower Size

Housing Size

Technical Guide: Heat Exchanger Material Selection

One important consideration when selecting an indirect gas-fired furnace for a Make-Up Air or Heating & Ventilating application is the heat exchanger material. The conditions created inside of the heat exchanger by the combustion process are the greatest factor limiting the life of the furnace. Selecting the proper heat exchanger material can greatly reduce the effects of these conditions and yield a long furnace life. To select the best heat exchanger material, the application and climate should be considered.

Corrosion and Thermal Expansion:

The first factor limiting the life of the heat exchanger is the by-products of the combustion process. During combustion process, water, nitrogen and sulfur form inside of the heat exchanger, creating a highly corrosive environment. The second factor is the high temperature of the heat exchanger. Like any material, a heat exchanger expands and contracts with changes in temperature. The expansion and contraction leads to high stresses in the heat exchanger. The corrosive conditions, combined with high stress can reduce furnace life if the wrong heat exchanger material is selected.

Available Materials:

Greenheck offers two material options for heat exchangers: aluminized steel and stainless steel. Both are selected for the specific application of indirect gasfired heat exchangers, but have different strengths.

The first material option is aluminized steel; steel that has been hot dipped in a molten aluminum bath. The result is a triple layer of protection on the inside and outside of the heat exchanger. The first protective layer is an aluminum coating that is the first line of defense against the corrosive conditions. Between the aluminum and the steel is a second protective alloy layer. As the outer aluminum corrodes, aluminum oxide forms and provides a third layer of protection. In order for the steel to begin corrosion, condensation must penetrate the aluminum oxide, aluminum and the alloy.

Stainless steel is the second available material option. Stainless gets its corrosive resistive properties from its chromium content. As stainless is exposed to a corrosive environment the chromium oxidizes and forms a single protective layer over the steel that slows corrosion.

Both materials are very effective at resisting corrosion, but stainless holds up better to the extreme temperatures found in some common applications. As aluminized steel approaches 1100ºF the aluminum begins scaling, exposing the steel. This temperature corresponds to an air stream temperature rise of approximately 70ºF. However, at temperatures below the aluminized steel scaling point, the aluminized steel tends to outperform stainless steel with respect to

heat stress cracking. From this information, Greenheck recommends aluminized steel for temperature rises of 60ºF or less and stainless for temperature rises greater than 60ºF.

Application and Climate Considerations:

Other than a corrosive environment, the air stream temperature rise is the largest factor driving heat exchanger material selection. With this in mind, we will consider two distinct applications for indirect gasfired heaters: Heating & Ventilating and Make-Up Air. From this, guidelines can be created to properly select the heat exchanger material.

Most Heating & Ventilating applications use a small amount of outside air (030%) which is mixed with a large amount of recirculated room air (70-100%). The relatively warm mixed air typically requires a temperature rise less than 50ºF, as illustrated in the table to the right. As a result, aluminized steel heat exchangers are recommended for H&V applications.

Make-up air applications are 100% outside air. As a result, the required temperature rise of the heat exchanger depends heavily on the climate. In mild climates, with outdoor winter design temperatures above 10ºF, a temperature rise of 60ºF or less is typical and aluminized steel is recommended (based upon a 70ºF discharge temperature). In colder climates with outdoor winter design temperatures less than 10ºF, the air stream temperature rise often exceed 60ºF. When this occurs, stainless steel is recommended.

Summary:

For Heating & Ventilating applications and Make-Up Air applications in mild climates, where the air stream temperature rise is less than 60ºF, aluminized steel will offer long furnace life and minimize the chance of heat exchanger stress cracking. For Make-up Air Applications in cold climates, where air stream temperature rise exceeds 60ºF, stainless steel is recommended.

Winter Design

Temp.

Outside

Air

Percentage

Mixed

Air

Temp.

Required

Temp.

Rise*

Recommended

Heat Exchanger

Material

-20 15 57 34 Aluminized

-20 30 43 47 Aluminized 0 15 60 31 Aluminized 0 30 49 41 Aluminized

30 15 64 26 Aluminized 30 30 58 32 Aluminized

* Assumes 70ºF space temperature and 90ºF discharge temperature

Winter Design

Temp.

Required

Temp.

Rise*

Recommended

Heat Exchanger

Material

-10 80 Stainless 0 70 Stainless

10 60 Aluminized 20 50 Aluminized 30 40 Aluminized

*Assumes a discharge temperature of 70ºF

TYPICAL

SPECIFICATIONS

H & V

CONTROLS

MUA

CONTROLS

FILTERS

DIFFUSERS

FURNACE

VENTING

MODEL IGX

DATA

MODEL IG

DATA

The Problem

Many of today’s indirect gas-fired make-up furnace specifications are based on yesterday’s technology and often call for unneeded components that add unneeded cost. Yesterday’s furnaces often featured a clamshell style heat exchanger, which due to inherent design problems resulted in condensation on the burner and in the housing. To manage the condensation and prevent corrosion, most clamshell specifications call for stainless steel burners and drip pans. Greenheck’s s-tube style furnace first limits condensation, then manages any condensation that does occur in a way that eliminates the need for stainless steel burners and drip pans.

The largest inherent problem with a clamshell furnace is the vertical heat exchanger configuration. The burners fire vertically up into the heat exchanger. The hot combustion gases travel up the straight single pass heat exchangers and collect at the top where they are vented. Because of the vertical configuration, any condensation that develops in the heat exchanger falls onto the burner and runs into the furnace housing. The condensation contains by-products of combustion, which are highly corrosive and destroy the furnace. To protect the furnace section and maintain an acceptable life, clamshell furnaces include costly stainless steel burners and drip pans.

Many clamshell furnaces are gravity vented, which is another problem that makes stainless steel burners and drip pans necessary. Gravity venting means that the combustion gases naturally vent through a stack, like smoke in a fireplace naturally escapes through a chimney. Gravity vented furnace efficiency is dependent on the outside conditions. Wind blowing over the stack can push the efficiency too high, resulting in excessive condensation. Even more condensation will develop when the furnace shuts down. Any combustion gases remaining in the heat exchanger will cool, condense and run down onto the burner and into the housing.

Clamshell furnaces also present a significant design limitation. The manifold, burners and drip pan are located under the heat exchanger, preventing a downblast discharge from the furnace section. If your application calls for a downblast discharge, an additional downturned section is required which increases the unit footprint and cost.

The S-tube Solution

Greenheck’s furnace design features horizontally firing burners and power venting with post purge cycle which together provide flexibility, maximum heat exchanger life and make stainless steel burners unnecessary and drip pans obsolete.

Power venting maintains optimum combustion levels, helping prevent the furnace efficiency from reaching the level where condensation begins. The combustion blower also enables a post purge cycle. When the furnace shuts down, the combustion blower continues to run, venting any combustion gases and drying the heat exchanger. Unless removed, this combination of gases and moisture would attack the inside of the heat exchanger and promote corrosion.

Greenheck’s horizontally firing heat exchanger means that the burners, manifold and gas train are located on the side of the furnace, rather than below it. And unlike a clamshell furnace, there is no drain pan under the furnace. With the bottom of the furnace free and clear, a downblast discharge is easily integrated into the furnace section. Unlike a clamshell style furnace, Greenheck furnace offers you the same compact design, whether your application calls for a horizontal or downblast discharge. The horizontally firing heat exchanger also stops condensation from dripping onto the burners and into the housing. Any condensation will remain in the corrosion resistant heat exchanger until it is power vented to the outdoors.

Summary

When your application calls for indirect gas-fired make-up air, be sure to specify the latest technology. Horizontally firing burners and s-tube heat exchangers with power venting and post purge cycle guarantee a long furnace life in the most compact and flexible unit configuration available.

Technical Guide: S-Tube Furnace Design

• Stainless steel or aluminized heat exchanger

• 80% thermal efficiency

• Power vented furnace with post purge cycle

• Double wall furnace section

• G90 galvanized steel housing

• Factory wired control center

• Single point power connection

• Optional painted finish

• Optional separated combustion for indoor installations

• Optional evaporative cooling

• Optional mixing box with controls

Model IG Model IGX

The Model IG has a less complex design and therefore typically offers the most economical solutions. The information below identifies application parameters for the IG and IGX.

Model IG Model IGX

• Airflow up to 7,000 CFM • Airflow up to 23,000 CFM

• Heat up to 400 MBH • Heating up to 2,400 MBH

• Single speed fan • Two speed fan option

• Variable volume fan option

• DX and chilled water cooling options

• Occupied / Unoccupied control option (IGX-HV Only)

Model IG or IGX?

Greenheck offers two models of indirect gas-fired make-up air and heating units. Both IG and IGX models include the following features and options:

TYPICAL

SPECIFICATIONS

H & V

CONTROLS

MUA

CONTROLS

FILTERS

DIFFUSERS

FURNACE

VENTING

MODEL IGX

DATA

MODEL IG

DATA

Model Housing

MBH (input)

CFM RPM/BHP

Total Static Pressure in inches of WG

Min. Max 0.75 1.00 1.25 1.50 1.75

IG-108 H10 75 125

800

RPM 1109 1216 1311 1399 -

BHP 0.26 0.31 0.35 0.40 -

1,200

RPM 1347 1445 1530 - -

BHP 0.59 0.68 0.75 - -

IG-109

H10 75 175 1,400

RPM 998 1128 1245 1352 1456

BHP 0.41 0.48 0.57 0.67 0.78

H20 75 250 2,400

RPM 1216 1306 1397 1484 1569

BHP 1.10 1.31 1.40 1.60 1.70

IG-110

H10 150 175

2,000

RPM 912 1013 1110 1199 -

H20 200 300 BHP 0.59 0.71 0.80 1.0 -

H30 325 400 3,000

RPM 1097 1172 1244 1315 1386

BHP 1.4 1.6 1.7 1.9 2.1

IG-112

H20 175 300 2,600

RPM 761 853 934 1009 -

BHP 0.7 0.9 1.0 1.2 -

H30 175 400 4,400

RPM 939 1006 1073 1137 1197

BHP 2.1 2.4 2.6 2.9 3.1

IG-115

H20 250 300 4,000

RPM 681 756 822 892 -

BHP 1.3 1.5 1.8 2.1 -

H30 250 400 7,000

RPM 889 943 994 1044 1093

BHP 4.2 4.6 5.0 5.5 5.9

Air Performance Data & Furnace Availability

Note: The air performance data shown does not include internal static pressure losses due to items such as filters, dampers and furnaces. For exact air performance data based on specific unit configuration, use the Greenheck CAPS selection program.

Model IG Performance Data

IG Maximum Motor Size

IG Pressure Loss Table

Maximum Motor Size by Fan Size

Housing 108 109 110 112 115

H10

⁄4 11⁄2 3- -

H20 -3355

H30 --357

⁄2

Housing Size CFM Housing

Louvered

Weatherhood

Aluminum Mesh

V-Bank Filters

Inlet Damper Furnace

Evaporative

Cooler

H10

1200 0.12 0.02 < 0.01 < 0.01 0.23 0.03

2400 0.25 0.10 0.03 0.01 0.90 0.12

3000 0.26 0.16 0.04 0.02 1.41 0.19

H20

1500 0.10 0.03 < 0.01 < 0.01 0.12 0.05

3000 0.26 0.10 0.03 0.01 0.50 0.19

4400 0.34 0.23 0.06 0.03 1.07 0.20

H30

3000 0.16 0.10 0.03 0.01 0.23 0.19

5000 0.23 0.29 0.08 0.03 0.65 0.26

7000 0.45 0.57 0.15 0.07 1.28 0.50

Note: The 3, 5, and 71⁄2 HP motors are not available with 115V supply power. The 71⁄2 HP motor is only available with 3 phase supply power.

36 in.

Weatherhood with Birdscreen (Optional)

All IG housing sizes are the same height.

Optional roof curb

Return Air

Opening

(Optional)

Downblast

Discharge

Opening

Horizontal Discharge

Power Vent Exhaust

Supply Gas Connection

*Unit weights by housing based on largest furnace and motor size available.

Total Unit with Evap Cooling

Housing Total Unit Weight Dry Weight Wet Weight

H10 380 695 936 H20 845 990 1231 H30 1190 1415 1797

Model IG Approximate Unit Weight (lbs.)

Model IG Return Air or Downblast Discharge Dimensions

Model IG Horizontal Discharge Dimensions

Model IG Unit Base Unit Dimensions

Model IG Intake Dimensions

Housing V W X Y

H10 32.5

30.0 3.8 8.5H20

41.5

H30

Model IG Unit Dimensions

Filter Section Intake

All dimensions are shown in inches

Housing

Width

100% Outside Air Recirculation

Louvered

Weatherhood

Birdscreen

WeatherhoodNoWeatherhood

Louvered

WeatherhoodNoWeatherhood H10 84.7 99.0 73.1 101.3 89.8 43.5 H20 87.6 102.0 76.2 104.3 92.8

52.6

H30 96.6 111.0 85.2 113.3 101.9

Housing B C D E F

H10 43.6 30.2

21.0

1.8

5.0

H20

52.6 39.2 1.0

H30

Housing G

H J K L M N P R S T

100%

Outside

Air

Recirculation

H10 73.1 89.0 43.5 26.5 23.7

2.7 3.9 12.4

73.8

12.9

35.6 2.1

H20 76.2 92.0

52.6

29.5

32.7

76.7

44.6

2.1

H30 85.2 101.0 38.5 85.7 2.1

Base of Unit

1.497

UNIT BASE PAN

0.500

1.652

1.500

WOOD NAILER

GPI CURB

SHEETMETAL SCREW

(BY OTHERS)

Sealant

Model IG Roof Curb Dimensions

Greenheck provides installation flexibility with multiple roof curb options that meet your needs. Whether for flat or pitched roofs, insulated or non-insulated decks, Greenheck curbs facilitate installation and provide weather tightness when roofed and flashed to the factory supplied roof curb 2 inch wood nailer. All curbs are manufactured with 18 gauge galvanized steel and may be shipped with, or in advance of the equipment. Roof curbs over 120 inches in length (70 inches for GPIP at 24 inches height) may ship knocked down for ease of installation.

Roof Curb Model Options Table for Model IG

GPI GPNS GPS GPIP

Roof Deck

Flat x x x Pitched x Insulated x x Non Insulated x x

Curb Construction

Tabbed & Riveted x Welded x x x Curb Height in inches 12, 16, 20, 24 8, 12 8, 12 12, 16, 20, 24

Model IG

Roof Curb Unit Detail

Model IG Roof Curbs

Housing

100% Outside Air Recirculation

H10 57.5 89.0 40.0

H20 60.5 92.0

49.0

H30 72.5 101.0

Model IG Roof Curb Dimensions

Model IG Supply Side Roof Curb Dimensions

Housing C D E F G H J K

H10 26.44 23.67 30.5 35.5

2.72 2 3.85 12.48H20 29.44

32.67

33.75 44

H30 38.44 42

Housing L M N P Q R S T

H10

12.89

35.55

36.5

2.32 2 2.4 2H20 44.55

45.5

H30 44.55

Model IG Return Side Roof Curb Dimensions

*Recommended roof openings.

Curb

Width

O.D.

Curb Length O.D.

2.25 in.

Roof Opening

Supply

Duct

Curb

Width

O.D.

Curb Length O.D.

1.75 in.

Roof Opening

Return

Duct

Curb Width

O.D.

Curb Length O.D.

Return

Duct

Supply

Duct

TYPICAL

SPECIFICATIONS

H & V

CONTROLS

MUA

CONTROLS

FILTERS

DIFFUSERS

FURNACE

VENTING

MODEL IGX

DATA

MODEL IG

DATA

Model IG Evaporative Cooler

Model IG Evaporative Cooling

Greenheck Evaporative Coolers include a galvanized steel housing with louvered intake, 2 in. aluminum mesh pre-filters, stainless steel evaporative media casing and drain pan. Evaporative cooling media shall be cellulose or fiberglass with a depth of 12 inches for approximate cooling effectiveness of 90%. Supply connection is field located through unit. Drain and overflow connections shall be piped through the side for easy installation. Equipment supports for mounting are optional. See Greenheck IOM for piping guidelines.

Model IG Total Unit Length with Evap

Drain

Connection

Overflow

Connection

Supply

Connection

FILTERS

Replacement

Media

Housing CFM 100% O.A.

Return Air

Unit

A B C D E F G Qty Size GFC P/N: Qty Size

H10 800 to 3,500 109.2 125.8 36.0 52.5 36.0 2.3 6.4 4.0 3.8 0.75 0.75 0.25 4 16x25x2 07451763

3 12x12x28.5

1 8x12x28.5

1 6x12x28.5

H20

800 to 3,500 112.2 128.8 36.0 52.5 36.0 2.3 6.4 4.0 3.8 0.75 0.75 0.25 4 16x25x2 07451763

3 12x12x28.5

1 8x12x28.5

1 6x12x28.5

3,501 to 7,000 112.2 128.8 36.0 68.6 36.0 2.3 6.4 4.0 3.8 0.75 0.75 0.25

2 16X25X2 07451763 5 12X12X28.5

4 16X20X2 07451437 1 6x12x28.5

H30

2,400 to 3,500 121.2 137.8 36.0 52.5 36.0 2.3 6.4 4.0 3.8 0.75 0.75 0.25 4 16x25x2 07451763

3 12x12x28.5

1 8x12x28.5

1 6x12x28.5

3,501 to 7,000 121.2 137.8 36.0 68.6 36.0 2.3 6.4 4.0 3.8 0.75 0.75 0.25

2 16X25X2 07451763 5 12X12X28.5

4 16X20X2 07451437 1 6x12x28.5

Typical Installation

Evaporative Cooler

Equipment Support

Curb

Louvered Intake

Pre-Filters

Stainless Steel Drain Pan

Evaporative Media

Supply Connection Field Located

Overflow

Drain

G E

TYPICAL

SPECIFICATIONS

H & V

CONTROLS

MUA

CONTROLS

FILTERS

DIFFUSERS

FURNACE

VENTING

MODEL IGX

DATA

MODEL IG

DATA

Hp1⁄41⁄23⁄4 111⁄2 2 21⁄2 3 5 71⁄2 10 15 20 25

Motor

Weight

16 20 22 36 42 45 67 69 75 110 115 203 268 350

Model IGX Motor Weights (lbs.)

Model Housing

MBH

CFM RPM/BHP

Total Static Pressure in inches of WG

Min. Max 0.75 1.00 1.25 1.50 1.75

IGX-108 H12 100 150

800

RPM 1109 1216 1311 1399 BHP 0.26 0.31 0.35 0.4 -

1,200

RPM 1347 1445 1530 - -

BHP 0.59 0.68 0.75 - -

IGX-109 H12 100 250

1,500

RPM 1014 1140 1255 1361 1460 BHP 0.45 0.54 0.63 0.73 0.84

2,400

RPM 1244 1329 1419 1503 1587

BHP 1.2 1.4 1.6 1.7 1.9

IGX-110 H12 100 250

2,000

RPM 0.995 1082 1166 1247 1325 BHP 0.93 1.1 1.2 1.4 1.5

3,000

RPM 1202 1275 1340 1401 1464

BHP 2.0 2.2 2.4 2.6 2.8

IGX-112 H22 150 600

2,600

RPM 761 853 934 1009 BHP 0.72 0.86 1.0 1.2 -

4,400

RPM 939 1006 1073 1137 1197

BHP 2.1 2.4 2.6 2.9 3.1

IGX-115 H22 150 600 4,000

RPM 741 808 871 931 986

BHP 2.0 2.3 2.6 2.9 3.2

IGX-118 H32 300 1,200

7,000

RPM 627 685 738 790 839

BHP 2.5 2.8 3.2 3.6 4.0

10,000

RPM 759 805 849 891 933

BHP 5.5 6.1 6.6 7.1 7.7

IGX-120 H32 300 1,200

10,000

RPM 590 634 678 723 765

BHP 4.0 4.5 5.0 5.6 6.1

15,000

RPM 763 795 829 861 892

BHP 10.9 11.6 12.3 13.1 13.8

IGX-122 H35 800 2,400

15,000

RPM 605 637 667 698 727

BHP 8.3 8.9 9.6 10.4 11.1

19,000

RPM 720 746 771 796 821

BHP 15.2 16.1 17.0 17.8 18.6

IGX-125 H35 800 2,400

19,000

RPM 563 594 625 655 683

BHP 9.8 10.7 11.7 12.8 13.8

23,000

RPM 643 671 697 723 748

BHP 15.9 16.9 18 19.2 20.4

Air Performance Data & Furnace Availability

Model IGX Pressure Loss Table

Note: The air performance data shown does not include internal static pressure losses due to items such as filters, dampers, cooling and furnaces. For exact air performance data based on specific unit configuration, use the Greenheck CAPS selection program.

Model IGX Performance Data

Housing

Size

CFM Housing

Louvered

Weatherhood

Aluminum

Mesh V-Bank

Inlet

Damper

Furnace

Evaporative

Cooler

H12

1200 0.12 0.04 0.02 0.01 0.04 0.10

2500 0.27 0.15 0.07 0.05 0.05 0.43

3500 0.35 0.30 0.13 0.10 0.07 0.84

H22

3000 0.16 0.08 0.02 0.02 0.04 0.22

4000 0.28 0.15 0.04 0.04 0.04 0.40

6000 0.33 0.34 0.09 0.09 0.09 0.90

H32

7000 0.26 0.26 0.03 0.06 0.11 0.42

10000 0.27 0.53 0.06 0.11 0.23 0.86

14000 0.54 1.03 0.12 0.22 0.45 1.69

H35

15000 0.40 0.03* 0.09 0.11 0.84 0.35

19000 0.39 0.05* 0.14 0.17 1.35 0.57

23000 0.57 0.08* 0.21 0.25 1.98 0.83

*The louvered weatherhood is not available on the IGX-H35. Weatherhood loss is shown for the birdscreen weatherhood.

Model IGX Intake Dimensions

Model IGX Unit Dimensions

Intake Width

Intake Height

Housing TUVW

H12 30.9 34 4.9 1.1

H22 41.7 39.95 4.9 1.1

H32 49.75 43.75 4.9 1.2

H35 74 47 5.8 1.6

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*AA - Filtered Weatherhood

Weatherhood Louvered V-Bank Mixing Box Cooling Fan Furnace Downturn

w/Birdscreen Intake w/Filters Filters Coil Plenum

Model IGX Unit Dimensions

*A downblast discharge on the IGX-H35 requires an additional downturned plenum section. All dimensions are shown in inches

Reference dimension S on page 12 for total width of filter housing

Housing A AA AAA B BB

D Furnace Size E F

Downturn*

Plenum

Width

Low High

H12 24.8 31.5 13.8 21.5 30.7 30 50.4 42.5 100-250 33.2 39 n/a 44.1

H22 31.5 46.6 16.9 24 34 30 69.4 52.2

150-300

33.2

44.9 n/a

44.6 350-400 53.9 500-600 66.4 44.6

H32 47 48.5 16.9 25.8 40.7 98 66

350-400 33.2

48.7 n/a 53.1500-800 66.4

1050-1200 99.6

H35 47 n/a n/a 27.7 45.25 n/a 62

800 50

54.6 37 93.75

1200 74 1600 87.1 2000 111.1 2400 124.2

Housing Furnace Size G H J K L

H12

100

44.1

28.6

21.9

1.8

150 21 15.9 200 27 9.9 250 32 4.9

H22

150

53.4

28.6

21.8

1.8

200 27.1 15.8 250 31 11.9 300 38

4.9

350-400 53.4 38 28.7

500

53.4

28.6

11.9

600 38 4.9

H32

350

52.2

39.4

8.7 2

400 38 8.7

500-600 29 17.6 1.8

700-1200 29 8.7 2

H35 800-2400 93.75 35 75.75 18.6 3.4

IGX Horizontal Discharge Dimensions

Discharge

Opening

Filter

Intake

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