Nu-Air Ventilation Systems Inc. - HRV Operating &Installation Manual
Rev October 10, 2010 - 23 -
10.2. Defrost, Recirculation and Furnace Interlock Jumpers
Defrost and recirculation modes are set according to model and, in some cases, by preferences. All
models leaving the factory have their jumpers pre-set. Depending on local Codes, you may choose to
interlock whenever the HRV/ERV is operating at any speed, or just high speed.
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