Dimensions Guide

Frost Prevention Mode
WhisperComfort incorporates built-in frost prevention technology
to avoid core freeze up.
• Above 32ºF both exhaust and supply are fully functional
• From 32ºF to 20ºF the mechanical damper on the supply air
closes for 30 minutes, then opens 1 hour at the set high/
low mode. The cycle repeats itself to avoid core freeze up.
(Exhaust only 30 minutes per 90-minute cycle)
• Below 20ºF the mechanical damper on the supply air remains
closed for 1 hour and opens 10 minutes at low mode. After
10 minutes the cycle will repeat or change if the temperature
has risen above 20ºF. (Exhaust only 60 minutes per 80-minute
cycle)
Settings
WhisperComfort has two 2-speed CFM settings
High Low
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Setting 1. 20 CFM 10 CFM
Setting 2. 40 CFM 20 CFM factory preset
The factory setting is 40/20 CFM. To change to optional 20/10
CFM setting, move the plug connector located in the junction box
to the 20 CFM side of receptacle. This step must be completed
prior to installation.
Switches
WhisperComfort operates in an on/off and high/low mode. When
the switch is turned off, the unit does not operate. When the switch
is turned on, the unit will operate at the high or low mode. A duplex
switch, designed for a single gang box, may be selected for switch
operation. Switch labels are provided for convenience to attach to
the selected switches.
32ºF
Open 1 hr.
Close 30 m.
Open 1 hr.
Open 10 m.
40 CFM20 CFM
Close 1 hr.
Open 10 m.
19ºF
-13ºF
SIZING
Need to choose 10/20 CFM mode when installing.
Ventilation Capacity Requirements
(CSA-F326)
10 CFM Single Bedroom Living room Family room
20 CFM Master Bedroom Large Basement room
Spot Ventilation
Need to choose 20/40 CFM mode when installing.
ASHRAE 62.2 2007
1 Bedroom 2 Bedrooms 3 Bedrooms
20 CFM 500 sq ft. N/A N/A
40 CFM 2500 sq ft. 1750 sq ft. 1000 sq ft.
Whole House Ventilation (IAQ)
Balanced Ventilation With Spot ERV
WINTER
SUMMER
Outside
Inside
Whole House ERV
WhisperComfort is also suitable to meet whole house ventilation
requirements under ASHRAE 62.2. The sizing charts on the next
page provide a guideline for number of bedrooms and square feet.
Additionally, two or even three WhisperComfort ERV’s may be
installed, often at a cost lower than a traditional whole house ERV.
Ideal for: Condominiums / Housing Authority properties / Hotels /
Studio apartments
ASHRAE 62.2 2007 Standard
The American Society of Heating, Refrigerating and Air Condition-
ing Engineers (ASHRAE) set a standard for whole house ventilation,
requiring that continuous mechanical ventilation be 7.5 CFM per
bedroom (master bedroom X 2) plus 1 CFM per 100 square feet,
with sone not to exceed 1.0. Panasonic WhisperComfort ERV is an
affordable, efficient way to meet this ventilation standard.
FV-04VE1 2 X 4" Ducts
FEATURES
Balanced Ventilation
Tightly built homes and buildings utilizing exhaust only fans can
create negative pressure. WhisperComfort solves this by supplying
air to replace exhausted air, helping to balance air pressure within
the home.
Panasonic WhisperComfort Spot ERV uses two 4 inch ducts – one
to exhaust stale air and the other to supply fresh air from outdoors.
Its low, continuous run ensures volatile organic compounds (VOC’s)
are vented out and replaced with fresh air.
Exchange Capillary Core
Indoor and outdoor air passes through Panasonic’s patented capil-
lary core technology designed to transfer heat energy and mois-
ture. This process tempers supply air while transferring moisture.
Motor Technology
Panasonic uses a single AC condenser motor to run two highly
efficient blower wheels. The motor is totally enclosed to ensure
long-life and continuous quiet operation.
Filters
Two filters clean exhaust and supply air before passing through the
ERV core, extending the life of the core.
Grille Design
The contemporary, low profile grille design incorporates spring clips
for easy removal.
Spot ERV
WhisperComfort is a ceiling insert ideal for a single room. Fresh air
is supplied at a low rate while maintaining balanced air pressure.
This is an affordable way to add ERV to a specific room or a new
addition.
Ideal for: Home office / Game rooms / Family rooms
Tight Home Air Pressure
Without ERV With Spot ERV
Spot ERV Technology
OUTSIDE
Cool
Cool
INSIDE
WarmWarm
Heat & Moisture
Transfer
OPERATION
Sizing example 1 (based on ASHRAE 62.2):
TWO BEDROOMS at 1600 SQ. FT.
Master Bedroom (7.5 CFM x 2) = 15 CFM
Second Bedroom = 7.5 CFM
1600 SQ. FT. x .01 = 16 CFM
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Total 38.5 CFM
Use WhisperComfort set at 40 CFM
Sizing example 2 (based on ASHRAE 62.2):
FOUR BEDROOMS at 2200 SQ. FT.
Master Bedroom (7.5 CFM x 2) = 15 CFM
Other 3 Bedrooms (7.5 CFM each) = 22.5 CFM
2200 SQ. FT. x .01 = 22 CFM
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Total 59.5 CFM
Use 2 WhisperComfort or 1 WhisperComfort and
1 WhisperGreen
®
*
ON
OFF
HI
LO
* WhisperGreen
®
are Panasonic exhaust fans with variable speed DC motor and
built-in controls. Ideal for both bathroom intermittent ventilation and whole house
continuous run ventilation.
Switch is not supplied.