HR150, 200; ER150, 200 FRESH AIR VENTILATION SYSTEMS
68-0269
6
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.
Fig. 5. Direct connection of supply air stream to furnace cold air return for HRV/ERV.
Fig. 6. Direct connection of ventilator supply air stream and exhaust air stream to furnace cold air return.
COLD AIR
RETURN
EXHAUST AIR FROM
VARIOUS PARTS OF
HOME (BATHROOMS
IF REQUIRED; KITCHENS
IF REQUIRED; ROOMS
WITHOUT OPERABLE WINDOWS,
AND POTENTIALLY BASEMENTS).
FORCED AIR
FURNACE
COMBUSTION
OR ELECTRIC
M20854
RETURN
AIR
OUTDOORS
NOTES:
1.
2.
3.
4.
FURNACE BLOWER NEED NOT OPERATE TO PROVIDE GOOD AIR DISTRIBUTION/QUALITY WITH THIS SYSTEM.
IF FURNACE BLOWER OPERATION IS REQUIRED TO HELP DISTRIBUTE SUPPLY AIR: RUN CONTINUOUSLY
OR INTERLINK ELECTRICALLY (LOW VOLTAGE).
NO SEPARATION REQUIREMENTS ARE NECESSARY BETWEEN DIRECT CONNECTION POINT AND FURNACE.
WEATHER-HOOD ARRANGEMENT IS FOR DRAWING ONLY. 6 FT (2m) MINIMUM SEPARATION REQUIRED,
18 IN. (0.46m) ABOVE GRADE MINIMUM.
40 IN. (1m) MINIMUM
COLD AIR
RETURN
FORCED AIR
FURNACE
COMBUSTION
OR ELECTRIC
M20853
RETURN
AIR
OUTDOORS
NOTES:
1.
2.
3.
4.
FURNACE BLOWER IS REQUIRED TO OPERATE WHEN VENTILATION IS REQUIRED.
SET THE FURNACE BLOWER TO RUN CONTINUOUSLY, OR INTERLINK ELECTRICALLY
(LOW VOLTAGE).
MINIMUM SEPARATION OF 40 IN. IS REQUIRED BETWEEN THE TWO
DIRECT CONNECTIONS.
EXHAUST AIR CONNECTION SHOULD BE UPSTREAM OF THE SUPPLY
AIR CONNECTION TO PREVENT EXHAUSTING ANY FRESH AIR.
WEATHER-HOOD ARRANGEMENT IS FOR DRAWING ONLY. 6 FT. (2 m)
MINIMUM SEPARATION REQUIRED, 18 IN. (0.46m) ABOVE GRADE MINIMUM.
