Planning The Installation - Honeywell Perfect Window HR150 Product Data

Fresh air ventilation systems
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PLANNING THE INSTALLATION

Application
The Fresh Air Ventilation System is designed to supply fresh
air and exhaust stale air. The system draws fresh outdoor air
through the ventilator for distribution throughout the house.
Stale air is exhausted through the ventilator and to the
outdoors. Heat is transferred from one airstream to the other
as the air passes through the opposite sides of the heat
transfer core. See Fig. 4.
FRESH
AIR IN
DEFROST
PORT
STALE
AIR FROM
HOUSE
Fig. 4. Duct connections and airflow.
Sizing
There are several methods that can provide satisfactory
results for sizing a ventilator to provide adequate ventilation
for a home. The ASHRAE Standard 62-1989 Ventilation for
Acceptable Indoor Air Quality suggests the following:
— .35 air changes per hour (ach) but not less than 15 cfm per
person for living areas = house size (sq ft) • ceiling height
(ft) / 60 (min) •.35 (ach)
Example:
= 2000 sq ft • 8 ft / 60 min •.35 ach = 93 cfm
— 50 cfm intermittent or 20 cfm continuous capacity for
bathrooms
Example:
50 cfm intermittent • 3 bathrooms = 150 cfm
20 cfm continuous • 3 bathrooms = 60 cfm
— 100 cfm intermittent or 25 cfm continuous capacity for
kitchens
Example:
100 cfm intermittent • 1 kitchen = 100 cfm
25 cfm continuous • 1 kitchen = 25 cfm
Option 1: Fresh Air Ventilation System provides continuous
fresh air supply of 93 cfm, and intermittent capacity for
bathrooms of 150 cfm. A separate 100 cfm exhaust fan is
used for the range hood.
Supply air flow required = 93 cfm
Exhaust air flow required = 150 cfm
Any Honeywell ventilation unit provides suitable ventilation
capacity. See Fig. 1.
HR150, 200, 205; ER150, 200 PERFECT WINDOW™ FRESH AIR VENTILATION SYSTEMS
STALE
AIR TO
OUTSIDE
FRESH
AIR TO
HOUSE
M6553B
5
Option 2: Fresh Air Ventilation System provides continuous
93 cfm fresh air supply, 150 cfm intermittent exhaust capacity
for bathrooms and continuous 50 cfm kitchen ventilation.
Supply air flow required = 93 cfm
Exhaust air flow required = 200 cfm
Honeywell HR200/ER200 have the exhaust capacity required
to meet the ventilation needs of this application. See Fig. 1.
Mounting Position and Location
The HR150/ER150, HR200/ER200 and HR205 can be
suspended from exposed ceiling joists, ceiling surface or floor
mounted. (Level ventilator so drains function correctly.)
NOTE: ER150C and ER200C are specifically designed for
installations in unconditioned spaces such as attics
and garages. (These units are not equipped with
drain kits.)
• Locate fresh air intake 6 ft (2m) or more from stale air
exhaust to prevent exhaust air from re-entering.
• Locate ventilator where length of ducting required is
minimal.
Install HR150/ER150, HR200/ER200 and HR205 in a
conditioned space using these guidelines:
• Pipe drain line (ER150C and ER300C do not have drain
kits) from the ventilator to a drain.
• Use an existing electrical outlet with appropriate current
rating (or install one) close to ventilator power cord.
• Allow space for drain line by placing the ventilator at least
10 in. (254 mm) off the floor.
• For access and removal of ventilator core, allow at least
25 in. (635 mm) of open space in front of unit.
Ducting
Ducting between the ventilator and the outdoors must be
insulated and have a continuous air vapor barrier. See Fig. 5.
IMPORTANT
All ducting to the outdoors must be terminated above
anticipated snow lines and be fitted with a weather
cap that incorporates bird screening.
SEAL OUTER LINING OF FLEX
DUCT TO OUTER COLLAR
INSULATED
FLEX DUCT
SEAL INTERIOR LINING OF
FLEX DUCT TO INSIDE COLLAR
Fig. 5. Sealing insulated duct terminations.
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.
COLLAR ON
VENTILATOR
M6557
68-0171-9

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