aldes H/E95 - Indoor Air Dryness and Humidity Issues; Frost Formation and Water Accumulation; Timer Cycle and High Speed Issues

Residential HRV/ERV
41
Indoor air is too dry
(note: an HRV is
not a dehumidier,
however by
exchanging indoor
air with outdoor air,
it can reduce excess
indoor humidity if
the outdoor air is
drier).
• Dehumidistat wall control is set too
low
• HRV operang speed is too high
• Improperly balanced HRV
• Increase setpoint of dehumidistat.
• Operate HRV at low speed.
• Call a contractor to balance the HRV airows
• Add moisture to air with a humidier
Indoor air is too
humid and/or
condensaon is
forming on the inside
of windows
• Dehumidistat is set too high
• Obstructed supply or exhaust grilles
• Not enough exhaust capacity near
source of moisture
• HRV operang speed is too low
• Decrease the setpoint of the dehumidistat.
• Reduce sources of indoor humidity (steam,
wet clothes, plants, rewood) and excessive
temperature
• Operate HRV at high speed or use
connuous venlaon (not intermient or
ECO modes).
Frost is forming on
the HRV and/or
ducts connected to
the HRV
• HRV is not balanced
• HRV automac defrost funcon is
not working
• Leaky vapour barrier around
insulated duct
• Hole in exible duct
• Tape and seal all joints and duct connecons
• Repair any holes in exible duct
• Call contractor to balance the HRV and
verify defrost funconality
Water is
accumulang in the
boom of the HRV
• Obstructed drain line or drainage
pan.
• Improper connecon of drain
• HRV is not level
• Remove obstrucons or kinks in the
drainage tube
• Open HRV and check for material blocking
the drainage holes.
• Adjust the mounng chains or bracket so
that the HRV is level
HRV stays in high
speed aer the
20/40/60 minute
mer cycle is
complete
• One or more extracon ZRT dampers
remains open
• Timer in another bathroom is sll
acve
• Dehumidistat detected excess
humidity while mer was on
• Automac defrost cycle is running
based on cold outdoor temperature
• Check if wall control is set to a high speed
mode (dehumidistat, high-occupancy, etc...)
• Check the bathroom exhaust terminals to
ensure that the dampers are fully closed.
• Wait a maximum of 30 minutes for defrost
cycle to complete.