NitroBox NO2 Filter
INSTALLATION GUIDE FOR ENGINEER / INSTALLER
1
NitroBox NO2 Filter
SHOULD YOU ENCOUNTER ANY PROBLEMS INSTALLING
THIS UNIT, CALL US ON: 0345 27 27 810
Safety
Important: Read these instructions fully before the installation of this appliance
1. Installation of the appliance and
accessories must be carried out by a
qualified and suitably competent person
and be carried out in clean, dry conditions
where dust and humidity are at minimal
levels.
2. Installation and maintenance personnel
must wear suitable safety clothing to
minimise the accident risk.
3. This manual covers the installation and
maintenance of the EnviroVent NitroBox
NO2 Filter.
4. The unit must be stored in a clean and
dry environment. Do not install the
appliance in areas where the following
may be present or occur;
• Excessive oil or grease laden
atmosphere.
• Corrosive or flammable gases, liquids or
vapours.
• Ambient temperatures above 80°C or
below -5°C.
• Humidity levels above 90% or is a wet
environment.
5. The appliance is not suitable for
installation to the exterior of the dwelling.
6. This appliance can be used by children
aged from 8 years and above and persons
with reduced physical, sensory or
mental capabilities or lack of experience
and knowledge if they have been given
supervision or instruction concerning
use of the appliance in a safe way
and understand the hazards involved.
Children should be supervised to ensure
that they do not play with the appliance.
Cleaning and user maintenance shall not
be made by children without supervision.
7. Ensure that external grilles are located
away from any flue outlet, in accordance
with relevant Building Regulations.
2
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Recommendation
1. Any flexible ducting used must be pulled
taught;
2. Ducting must be installed in such a way
that resistance to airflow is minimised;
3. Duct joints to the unit’s duct ports must
be fixed using a method that ensures a
long term seal is achieved.
Handling
1. Before off-loading products, please
ensure that the means of transport/
lifting is suitable to accommodate the
required weight and size capacity;
2. Manually handle unit in accordance
with the 89/391/EEC-OSH standard
(and associated updates) and/or local
regulations.
Packing Contents
Inspect the unit when taking delivery. Check
the unit for damage and that all accessories
have been supplied. Package supplied with:-
• NitroBox NO2 Filter system
(including active carbon filters and G4
pre-filter as standard) x 1.
• Product Manual x 1.
• 3mm Hex Key with inset magnet x 1.
Any shortages or damage must be
immediately reported to the supplier.
3
NitroBox NO2 Filter
SHOULD YOU ENCOUNTER ANY PROBLEMS INSTALLING
THIS UNIT, CALL US ON: 0345 27 27 810
Contents
Safety
Important Information 1
Recommendation 2
Handling 2
Packing Contents 2
Product Information
Component Identification 4
Dimensions 5
Installation
Mounting 6
Wall Mounting 7
Ducting Connection
Airflow Direction 8
Ducting Connection 8
Ducting Behind Unit 8
Maintenance
Filter Replacement 9
Pre-Filter 9
Active Carbon Filters 9
NO2 Testing Kit 9
Carbon Life Prediction Service 9
How to Change Filters 10
Disposal of Filters 10
Accessories and Spare Parts List
Removable Insulation Jacket 11
Filters 11
NO2 Testing Kit 11
Fitting Kit 11
Warranty
Terms of Warranty 12
4
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Product Information
The NitroBox NO2 Filter reduces Nitrogen Dioxide (NO2) which is prominently produced by
exhaust gases from diesel engines. Due to this pollution arising in cities and urban areas
there is a need to implement mitigation measures to improve the indoor air quality (IAQ). The
NitroBox NO2 Filter is an effective means of reducing high NO2 levels down to an acceptable
level of 40µg/m
3
as a mean annual concentration level.
The units are fully foam insulated. This reduces duct bound noise and thermal transmission
and helps to avoid condensation build up. Where the unit is installed in very cold spaces or if
the outside air is below -5°C then a custom designed removable insulation jacket is available
from EnviroVent, see Accessories and Spare Parts List.
Airflow IN Port
Carbon Filter
Retention
Screws
Pre-Filter
Front Panel
Filter Rails
Active Carbon Filters
Component Identification
5
NitroBox NO2 Filter
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Dimensions (mm excluding ports)
Product Information
205
604
350
Port Size
Round: Ø150mm
Filter Access - 400
6
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Read and observe the guidance and
safety information
• The NitroBox NO2 Filter is designed to be
mounted in any orientation.
• The mounting surface substrate must be
sufficiently strong to support the unit.
• Ensure there is sufficient access around
the unit for future maintenance.
• Do not ‘box-in’ the unit making access
to the unit difficult for maintenance and
repair.
Mounting
1. Mark positions of the mounting holes onto
the mounting surface using dimensions
as shown.
2. Prepare the mounting surface in the
positions specified for four Ø8mm fixings.
Fixings must be suitable for the mounting
surface substrate and the weight of
the unit. Fixings are not supplied due
to the variation in materials. For advice
on suitable fixings contact your local
specialized fixings dealer.
3. Mount the unit using selected fixings.
722
324.5
Fixing
positions
Installation Instructions
7
NitroBox NO2 Filter
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Wall Mounting (Vertical Only)
Ducting Behind Unit
1. Attach the mounting brackets to the unit
using M8 fixings provided (EV-FILTBM-NO2).
2. Mark positions of mounting holes onto wall
using dimensions as shown.
3. Prepare the wall in the positions specified for
eight Ø6mm fixings at the marked positions.
Fixings must be suitable for the mounting
surface substrate and the weight of the unit.
Fixings are not supplied due to the variation
in materials. For advice on suitable fixings
contact your local specialized fixings dealer.
4. When fitting screws position the head leaving
between 2mm and 4mm gap between wall
and underside of head, see illustration.
5. Guide slots in mounting bracket over fixing
screw heads. Lower the unit so that the fixing
comes to rest in the slots in the mounting
brackets ensuring that all fixings heads are
within the slots.
6. Connect ducting in the method shown
opposite.
Installation Instructions
20
MIN 2MM
MAX 4MM
20
500
324.5
284.5
Fixing
positions
Rear Front
Fixing Screw
8
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Airflow Directions
The NitroBox NO2 Filter uses a prefilter and
active carbon filters, the air to be filtered must
pass though the prefilter before the active
carbon filters, therefore it is very important
that ducting is connected correctly
Ducting Connection
The NitroBox NO2 Filter has labels with icons
indicating the airflow IN and airflow OUT
ports.
Ducting Behind Unit
Ducting Connections
Mounting Ducting Behind Unit
IN
This label defines that the
port at this end of the unit
must have airflow going
into the unit.
OUT
This label defines that the
port at this end of the unit
must have airflow leaving
the unit.
9
NitroBox NO2 Filter
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THIS UNIT, CALL US ON: 0345 27 27 810
Filter Replacement
Prefilters should be replaced at least annually,
or more regularly dependent on environmental
conditions. To be certain if the active carbon
filters require changing, we recommend using
the NO2 testing kit or the Carbon Life Prediction
Service.
Prefilter
Prefilter can be changed by the householder.
Replacing the prefilter for a higher grade (G4 to
F7) will increase the system resistance and may
require re-commissioning to maintain the design
airflow rates.
Active Carbon Filters
Changing of active carbon filters should be
carried out by experienced or trained personnel
in accordance with safety requirements as
defined by the “Control of Substances Hazardous
to Health” (COSHH) Regulations. i.e. Someone
who fully understands the design, operation and
implications of the product and its use.
NO2 Testing Kit
A NO2 testing kit is available from EnviroVent
that can be used to determine the levels of NO2
within the property. The testing kit requires a
minimum of 8 hours of exposure to the air and
during this time the property must be sealed
from the outside air meaning all doors/window/
vents closed and only the ventilation system
containing the NO2 filter to be in use.
This will give an accurate result for the
performance of the NO2 filter. If the levels of NO2
are greater than 40µg/m
3
then the filter should
replaced.
The 8hr exposure test kit consists of a plastic
container with a removable black plastic cap.
If the testing kit is not to be used immediately
after receipt then it must be stored in a sealed
polyethylene bag or similar and kept in a
refrigerator.
Instructions for use
1. Apply sample identifier that comes with the
kit to the back of the sampler.
2. Fix the sampler to a vertical surface using
adhesive tape, blu-tack or similar.
3. Remove the black cap and store in a safe
place. There is a minimum of 8 hours of
exposure and can be exposed up to 72 hours.
At the end of the exposure period, replace
cap and label the sample with the barcode
label provided.
4. Affix the corresponding number label to the
exposure sheet.
The testing kit should be returned within 2
weeks and must be stored in a refrigerator
until dispatch.
Carbon Life Prediction Service
If requested, EnviroVent can provide a Carbon Life
Prediction Service. Part used filters can be sent to
EnviroVent whereby they are tested to determine
the life expectancy of the carbon cells in use.
If the filters are likely to have been exposed to
hazardous contaminants then EnviroVent must
be informed of this. Please contact EnviroVent
for more information.
Maintenance
10
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Maintenance
How to Change Filters
1. Remove front cover using 3mm Hex Key
provided.
2. For pre-filter slide out filter from casing
using handle attached to filter.
3. For active carbon filters unscrew M5
screws using 3mm Hex Key on the top
mounting rails as shown, and slide out
filter from casing. Only perform this
action one filter at a time as filters may
drop when mounted in a ceiling void.
4. Replace active carbon filters one at a
time. Slide filter into casing and fully
screw down the M5 screw in filter rail, do
not over tighten.
5. Replace pre-filter by sliding back into
casing. Ensure the airflow direction
corresponds with the direction arrow on
filter.
Disposal of Filters
The carbon within the filters are impregnated
with chemicals and therefore has to be
treated as specialist waste. The disposal of
the filters must be carried out by a specialist
waste disposal company and not by the
inhabitant of the property.
EnviroVent do not offer a waste disposal
service and therefore cannot accept filters for
disposal, but can recommend the following
company:
Environmental Resource Group
T: 0844 692 0000
W: www.environmentalresourcegroup.com
DO 5463 Iss 01
The Active Carbon Filters are
Dangerous for the Environment
11
NitroBox NO2 Filter
SHOULD YOU ENCOUNTER ANY PROBLEMS INSTALLING
THIS UNIT, CALL US ON: 0345 27 27 810
Accessories and Spare Parts List
Removable Insulation Jacket
EnviroVent can provided a custom designed
removable insulation jacket for the NitroBox
NO2 Filter which will provide 30mm of insulation
material with thermal conductivity of 0.04W/
(m.K). This jacket needs to be wrapped around
the unit before mounting to a wall or ceiling. The
unit must be offset from the wall or ceiling by
a minimum of 30mm for space required for the
insulation material. The method of offsetting
the unit must be able to support the weight of
the unit. The insulation jacket can be opened by
means of hook and loop fasteners on flaps at
the front and this will give access to the filters
for inspection and replacement.
Filters
Model Part
Number
G4 Pre-
Filter
F7 Pre-
Filter
Active
Carbon
Filter
EV-FILTB1-
NO2
FILTER-G4-
FILTB
FILTER-F7-
FILTB
FILTER-C-
FILTB1
EV-FILTB2-
NO2
FILTER-G4-
FILTB
FILTER-F7-
FILTB
FILTER-C-
FILTB2
Model Part Number
Removable
Insulation Jacket
EV-FILTB1-NO2 EV-FILTBJ-NO2
EV-FILTB2-NO2 EV-FILTBJ-NO2
Fitting Kit
Model Part Number
Ducting Behind Unit
Mounting Kit
ALL MODELS EV-FILTBM-NO2
NO2 Testing Kit Exposure Time
KIT-TEST-NO2 8 to 72 Hours
NO2 Testing Kit
A NO2 testing kit is available from EnviroVent
that can be used to determine the levels of NO2
within the property.
12
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Warranty Conditions & Exclusions
The EnviroVent NitroBox NO2 Filter is covered by a full 3 year warranty which will benefit the
occupier over many years. In the event that the product requires servicing, maintenance or
reaches the end of its useful life, the quick, simple component replacement programme will
ensure minimal disruption - no re-wiring, no drilling or dust.
What should I do if I have a problem?
If, after thoroughly reading this booklet, you feel that your NitroBox NO2 Filter is not working
correctly, you can telephone 0345 27 27 810 (operational from 9:00am to 5:00pm Monday to
Friday), and ask for technical assistance. You will either be given guidance over the telephone,
or an arrangement will be made for an engineer to visit. In any event, please have the following
information ready. This will enable your call to be dealt with quickly and efficiently.
Please note that proof of purchase by the way of a receipt is required and that any fans bought
from an unapproved source, including but not limited to Ebay, will render the guarantee invalid.
Serial number of the unit
We appreciate you choosing this quality EnviroVent product, which is designed and manufactured
to the highest specification in Harrogate, North Yorkshire. We are confident that you will be
delighted with the performance of the system and the resulting improvement in air quality in
your home after the installation of the unit.
Your warranty covers any defect or break down that arises due to faulty materials or construction.
Terms of Warranty
• The unit must be correctly installed and operated according to the instructions contained
in the user guide supplied.
• The warranty will be rendered invalid if the unit has been serviced, maintained, repaired,
taken apart or tampered with by any person not authorised by EnviroVent Ltd.
• The warranty will be rendered invalid if the unit is turned off. Turning the unit off can
damage it.
• The warranty does not cover accidental damage, misuse or abuse.
• The warranty is in addition to your statutory or legal rights.
• The guarantee will only be honoured from approved suppliers.
13
NitroBox NO2 Filter
SHOULD YOU ENCOUNTER ANY PROBLEMS INSTALLING
THIS UNIT, CALL US ON: 0345 27 27 810
Serviced By Company Date Notes
Service Record
Weee Directive
To all residents of the European Union;
Important environmental information about
this product. This symbol on this unit or
the package, indicates that disposal of
this unit after its lifecycle could harm the
environment.
Do not dispose the unit as unsorted
municipal waste; it should be disposed by a
specialized company for recycling. This unit
should be returned to your distributor or to
a local recycling service. Respect the local
environmental rules. If any doubt contact
your local authorities about waste disposal
rules.
We want to hear from you
Your feedback is important to us as we strive to improve our
products, services, and overall customer experience. Please email
us to help us serve you better: feedback@envirovent.com
AFTER INSTALLING THIS UNIT PLEASE PASS ONTO END USER
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Please read carefully to ensure
simple installation and a long
trouble free life for the user.
Delivering innovative and sustainable
ventilation solutions worldwide
EnviroVent Ltd
EnviroVent House
Hornbeam Business Park
Harrogate
HG2 8PA
T / 01423 810 810
F / 01423 301 022
E / info@envirovent.com
W / envirovent.com
E&OE | MKT ENV343-V1-21.02.18
Due to our policy of continuous innovation
and improvement EnviroVent reserves
the right to alter products specification
and appearance without notice.
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