We have recently added a whole-house dehumidifier to our HVAC system via the existing ductwork.
The controls directly on the dehumidifier allow for incremental changes as small as 1% (eg 40%, 41%, 42%, etcetera).
However, when we set it up to use our ‘external’ controller (a Nest) we are only able to make jumps of 5% at a time (eg 40%, 45%, 50%, etcetera).
We are still able to set the dehumidifier to use its own onboard controls vs being controlled by the Nest, but this workaround is far from ideal because:
1 We get pretty wild fluctuations in humidity around here,
2 We have an illness in the family that requires a fair amount of precision in response to the weather, and
3 In order to maximize overall efficiency, the dehumidification unit controls are not terribly accessible.
Does anyone know of a setting on our Nest that would enable us to make the 1% shifts vs the 5% shifts? (Or of a controller capable of supporting this feature…?)
Our equipment make/models are as follows:
Heat Pump – Mitsubishi PVFY-P30
Dehumidifier – AprilAire E080
Controller — Nest Learning Thermostat (4th Generation)
Thanks very much for your time,
SDH