User Guide
Table Of Contents
- 1 Controlling Your HRV
- 2 Selecting the Ventilation that is Right for You
- 3 How the Dehumidistat Works
- 4 Main Wall Controls
- 4 Main Wall Controls
- 4 Main Wall Controls
- 4 Main Wall Controls
- 4 Main Wall Controls
- 5 Timers and Repeaters
- 5 Timers and Repeaters
- 6 Maintenance Instructions
- 6 Maintenance Instructions
- 7 Troubleshooting
- 7 Troubleshooting
- 8 Limited Warranty
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3 HOW THE DEHUMIDISTAT WORKS
During the heating season (winter), high indoor humidity levels have become a problem in
many well insulated, tight homes. Excessive condensation on the window is a visual sign of high
indoor humidity levels. High indoor humidity levels can result in mold and mildew and the
eventual degradation of the building structure itself.
Your HRV reduces indoor humidity levels when the outdoor air is drier than the indoor air.
These conditions usually occur during the heating season when outdoor temperatures are less
than 15°C (59°F). During the heating season, the operation of the HRV may reduce indoor
humidity levels sufficiently to eliminate the need for further dehumidification. If your home
requires further dehumidification, use the Dehumidistat feature located on the wall control. High
speed ventilation will be initiated upon exceeding the Dehumidistat set point regardless of the
mode and speed of operation. Once the humidity in the house is reduced, the HRV will revert to
its previous setting. The Dehumidistat function should be set to off for all seasons except the
heating season because a dehumidifying effect occurs only when the outdoor air is dryer than
the indoor air.
We suggest operating the HRV for the first few days without using the Dehumidistat function to
observe if further dehumidification is required. The Dehumidistat operates in percentage of
relative humidity (% RH), with 60 being high and 20 being low. If, after a few days, further
dehumidification is required (i.e. the house is still too humid), set the humidity level to a lower
amount.
The average person is comfortable between 30% RH and 50% RH. The Dehumidistat should be
set to off for all seasons except the heating season.
Note
• Only certain main wall controls are equipped with an adjustable Dehumidistat.
• Dehumidistat Disable automatically disables the Dehumidistat function on the main wall
control when outdoor temperatures exceed 15°C (59°F) for a full 24-hour period. All other HRV
features and functions operate normally while the Dehumidistat function is disabled.
• Dehumidistat Re-enable automatically re-enables the Dehumidistat function if either the
outdoor temperature drops below 15°C (59°F) for a full 24-hour period or if the HRV is reset
(unplugged for 30 seconds).