Room classification
Number of rooms
CFM (L/s)
CFM Required
Master bedroom
x 20 cfm (10 l/s)
=
Basement
yes or no
=
Bedrooms
x 10 cfm (5 l/s)
=
Living room
x 10 cfm (5 l/s)
=
Others
x 10 cfm (5 l/s)
=
Kitchen
x 10 cfm (5 l/s)
=
Bathroom
x 10 cfm (5 l/s)
=
Laundry room
x 10 cfm (5 l/s)
=
Utility room
x 10 cfm (5 l/s)
=
Total Ventilation Requirements
(add last column )
=
if yes add 20 cfm / 10 l/s
if no = 0
Alternate Method
2
TABLE OF CONTENTS
TECHNICAL DATA
VHR 704R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Mounting the Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Location & Ducting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Air Flow Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Modes Of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Optional Remote Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 15
The Best
Limited Warranty
in the Business
• The heat recovery aluminum core has a
limited lifetime warranty.
• The motors found in all Fantech HRV’s
require no lubrication, and are factory
balanced to prevent vibration and promote
silent operation.
• The limited warranty covers normal use.
It does not apply to any defects,
malfunctions or failures resulting from
improper installation, abuse, mishandling,
misapplication, fortuitous occurrence or
any other circumstances outside
Fantech’s control.
• Inappropriate installation or
maintenance may result in the
cancellation of the warranty.
• Any unauthorized work will result in
the cancellation of the warranty.
• Fantech is not responsible for any
incidental or consequential damages
incurred in the use of the ventilation
system.
• Fantech is not responsible for providing
an authorized service center near the
purchaser or in the general area.
• Fantech reserves the right to supply
refurbished parts as replacements.
• Transportation, removal and installation
fees are the responsibility of the purchaser.
• The purchaser is responsible for ensuring
that applicable local and national codes
are observed.
• The warranty is limited to 5 years on parts
and 7 years on the motor from the date of
purchase, including parts replaced during
this time period. If there is no proof of
purchase available, the date associated
with the serial number will be used for the
beginning of the warranty period.
* This warranty is the exclusive and only
warranty in effect relative to the ventilation
system and all other warranties either
expressed or implied are invalid.
Sizing (Example) for maximum airflow normally required.
HRVs are typically sized to ventilate the whole house at a minimum of 0.35 air changes per
hour. To calculate, simply take the square footage of the house (including basement) and multi-
ply by the height of the ceiling to get cubic volume. Then, divide by 60 and multiply by 0.35.
Example:
SQFT of House
1100
Basement
1100
Total SQFT
2200
Height of ceiling
x 8
Cubic volume
17600
/ 60
Maximum airflow required (CFM)
293
x 0.35
103
* Always consult your local code for sizing requirements in your area.
1 cfm = 0.47189 l/s
1 l/s = 3.6 m
3
/hr
***Illustrations &
images in this
manual may not be
exactly like unit
purchased, these
illustrations & imag-
es are for examples
only.***
