Venting For Indoor Units - Greenheck IGX Installation, Operation And Maintenance Manual

General Venting and Combustion Air
1. Do not install units in locations where flue products
can be drawn into adjacent building openings such
as windows, fresh air intakes, etc. Distance from
vent terminal to adjacent public walkways,
adjacent buildings, operable windows, and
building openings shall conform with the local
codes. In the absence of local codes, installation
shall conform with the National Fuel Gas Code,
ANSI Z223.1, or the CAN/CGA B-149 Installation
Codes.
2. Building materials that will be affected by flue
gases should be protected.
3. Avoid locating in an area where deep snow is likely
to accumulate. During the winter months, keep
snow clear on the access side of the unit to
prevent any blockage of combustion air inlet or
flue exhaust openings (outdoor units only).
Venting Instructions:
Outdoor Units
1. Do not modify or obstruct the combustion air inlet
cover or the combustion blower weatherhood.
2. During winter months, periodically clear snow from
the access side of the unit to prevent blockage of
the inlet and exhaust openings.
4. Maintain minimum horizontal clearance of 4 feet
from electric meters, gas meters, regulators, and
relief equipment. In Canada, the minimum
clearance is 6 feet.
5. Local codes may supercede any of the above
provisions.
6. Be sure that the minimum clearances to
combustible materials are maintained.
Unit Clearances to Combustible Materials
Indoor units, clearance from combustible
material are determined by the National
Fuel Gas Code and/or other local codes.
Outdoor units, the combustion blower
discharge must be located a minimum of
42 inches from any combustible materials.
3. Do not add vents other than those supplied by the
manufacturer.
Combustion Blower
Exhaust Weatherhood
Combustion Air Inlet Cover
8