Honeywell Perfect Window HR150 Product Data page 4

HR150, 200; ER150, 200 PERFECT WINDOW™ FRESH AIR VENTILATION SYSTEMS
FRESH AIR
FROM OUTSIDE
DEFROST
PORT
FILTERS
STALE
AIR FROM
INSIDE
Fig. 3. Duct connections and airflow (HR150B/HR200B,
ER150B/ER200B).
FRESH AIR
FROM
OUTSIDE
FILTERS
STALE
AIR FROM
INSIDE
Fig. 4. Duct connections and airflow (ER150C/ER200C).
Sizing
There are several methods that can provide satisfactory results
for sizing a ventilator to provide adequate ventilation for a
home. There is a new residential ventilation standard,
ASHRAE 62.2, that suggests the following:
— 7.5 CFM per person (count people as 1 per bedroom plus 1)
plus 1 CFM per 100 sq. ft.
Example:
2200 sq. ft. house with 4 bedrooms
= (7.5 CFM x (4 bedrooms + 1)) + (1 CFM x (2200 sq. ft. / 100))
= (7.5 x 5) + (2200 / 100)
= 37.5 + 22
= 59.5 CFM
In this case 60 CFM continuous would provide satisfactory
ventilation for this home.
Some regions still use the previous standard, ASHRAE 62.1,
as the code for ventilation in their region.
The ASHRAE Standard 62.1 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
68-0171—10
STALE
AIR TO
OUTSIDE
FRESH
AIR TO
INSIDE
BALANCING
DAMPER
M29739
STALE
AIR TO
OUTSIDE
FRESH
AIR TO
INSIDE
BALANCING
DAMPER
M29740
4
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.
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 and HR200/ER200 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 in regions where the outdoor tempera-
ture does not drop below freezing. (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 and HR200/ER200 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.