1
How the NU-AIR System Works
This heat recovery ventilator (HRV) provides fresh air to a conditioned space while exhausting an equal
amount of stale air. Heat energy is transferred from one air stream to the other within a non-contact cross
flow heat exchanger.
Two forward curve blowers work to bring fresh air into the space and exhaust an equal amount of
stale air.
Incoming fresh air is filtered before flowing through the heat exchange core.
Stale, humid air flows through the cross-flow heat exchanger and transfers the heat to the
incoming fresh air.
Warm fresh air is distributed through an independent ductwork system or an existing air distribution
system.
2
Features and Operation
These models use microprocessor based control technology.
The standard control configurations of these HRV’s consist of two speed settings selectable from a remote
control. Connection between the HRV and control is achieved through low voltage wiring.
Features include:
Powerful transformer
Intelligent defrost.
Self-resetting fuse to protect the board against mis-wiring.
Motor speed control (NU0103, NU0305, NU0406 only) – Motors can be independently adjusted in
HRV high and low speeds. Optional setting for 220V/50Hz geographic areas.
Fan interlock
3
Installation Instructions
3.1
Installer’s Responsibilities
Installers are responsible for the performance of the ventilation system and for ensuring that all codes and
standards are met.
Do not mount the fresh air supply near a source of contaminated air such as automotive exhaust, gas or
propane exhaust or oil tanks.
Combustion appliances such as furnaces and hot water heaters must not draw combustion air directly from
an H/ERV.
3.2
Installation Basics
Before installing a
Nu-Air
Light Commercial H/ERV for the first time, please read these instructions.
Summary of Contents for NU0103
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