Revision 0.36 [01/27/2015] Page 7
INSULATING
In the winter, the unit will be bringing in cold air, passing it through the heat pump, and then
exhausting EVEN COLDER air. In the summer, the CERV will be bringing in hot air, passing through the
heat pump, and exhausting EVEN HOTTER air. It is therefore extremely important that the components
of the system are properly insulated, as to prevent any condensation on the ducting.
PART AAND PART BMODULES
The Part A (control module) and Part B (heat pump module) are internally insulated using a UL
approved R8.0 insulation. The Part A and Part B modules therefore do not need to be insulated (with
the exception of the duct fittings).
DUCTS
All ducts except for the RETURN (from inside) must be insulated. It is recommended to use a
minimum of R6.0 insulation (such as 6” fiberglass ductwork insulation sleeve found at home
improvement stores). In colder climates, it may be necessary to add additional insulation if it appears
that the ducts may be showing signs of sweating.
FILTER BOXES
The Fantech FB6 filter box (in the fresh air supply line) must be insulated. It is recommended to use a
minimum of R6.0 insulation surrounding the entire filter box (be sure to leave a way to replace the
filter). If there are multiple filter boxes stacked together (such as one on top of the other), you must
insulate between the two.
IN-LINE FANS
Both supply and exhaust fans must be insulated. It is recommended to use a minimum of R6.0
insulation surrounding each fan. If there are multiple fans stacked together (such as one on top of the
other), you must insulate between the two with a double layer of insulation. In the winter, for
instance, the supply fan may be blowing 80F air inside the house, while the exhaust fan may be
blowing 30F air back outside. Without insulation between the two fans, therefore, the CERV’s
conditioning capabilities would be severely diminished.
