Honeywell Perfect Window HR150 200 Product Data page 9

Design and installation of ductwork must be according to standard HVAC practice to deliver required quantities
of fresh air to temperature-controlled space and exhaust equivalent quantities of room air to the outside.
Keep intake and exhaust duct runs as short as possible with few bends or elbows.
• Keep duct sizes as large as possible throughout the installation.
• Use a 6 in. diameter round duct for all connections to and from the ventilator.
• Separate outside intake and exhaust vents by at least 6 ft (2m).
Do not locate the fresh air vent where it blows directly onto occupants or the thermostat.
NOTES:
Do not locate the fresh air intake close to known sources of pollutants such as automobile exhaust, a
dryer vent or chimney smoke.
• Ducting the supply outlet and/or the exhaust inlet of the ventilator to the return air plenum of the air handler
is an excellent way to distribute fresh air and exhaust stale air from all parts of the house, while reducing
installation costs. When choosing this method, balance the ventilator when the air handler is running and
interlock the ventilator so that it can run only when the air handler runs. See Fig. 6. An alternate method is to
balance the ventilator when the air handler is not running and let the ventilator run whether the air handler is
running or not, see Fig. 5. An independent installation is shown in Fig. 7.
NOTE: When the home is occupied, continuous operation of the ventilator is recommended. When the furnace air handler
operates, fresh air is distributed through the heating/air conditioning supply registers. When the air handler is off,
fresh air is delivered through both supplies and returns.
• An electrical interlock or an automatically powered damper must be used to prevent unwanted entry of
outside air if the ventilator is turned off while the furnace air handler continues to operate.
OUTDOORS
EXHAUST AIR FROM
VARIOUS PARTS OF
HOME (BATHROOMS
IF REQUIRED; KITCHENS
IF REQUIRED; ROOMS
WITHOUT OPERABLE WINDOWS,
AND POTENTIALLY BASEMENTS).
NOTES:
1. FURNACE BLOWER NEED NOT OPERATE TO PROVIDE GOOD AIR DISTRIBUTION/QUALITY WITH THIS SYSTEM.
2.
IF FURNACE BLOWER OPERATION IS REQUIRED TO HELP DISTRIBUTE SUPPLY AIR: RUN CONTINUOUSLY
OR INTERLINK ELECTRICALLY (LOW VOLTAGE).
3.
NO SEPARATION REQUIREMENTS ARE NECESSARY BETWEEN DIRECT CONNECTION POINT AND FURNACE.
4.
WEATHER-HOOD ARRANGEMENT IS FOR DRAWING ONLY. 6 FT (2m) MINIMUM SEPARATION REQUIRED,
18 IN. (0.46m) ABOVE GRADE MINIMUM.
Fig. 5. Direct connection of supply air stream to furnace cold air return for HRV/ERV.
HR150, 200; ER150, 200 Perfect Window™ Fresh Air Ventilation Systems 68-0171—12
RETURN
AIR
COLD AIR
RETURN
FORCED AIR
FURNACE
COMBUSTION
OR ELECTRIC
M6549D
7