Will it work with your system?
Works well with
- Dry winter air
Check first if you have
- Portable humidifiers
What it controls
The Aprilaire 4655 Humidistat is a humidistat.
It switches a whole-house humidifier by humidity rather than temperature. How humidistats work.
Voltage, per the listing: 24 V AC.
Compatibility, per the listing: Touch.
Also on the listing: dimensions of 1.94 in (D) x 5.13 in (W) x 3.38 in (H) and a weight of 5.6 ounces.
Warranty, per the listing: 5 Year Manufacturer.
Compatibility and specs
These come from the maker's listing for this exact model; the source of each is marked. Anything the maker leaves out is marked not stated.
| Model number | 4655 | Retailer |
|---|---|---|
| Features (seller) | Manual Mode | Retailer |
| Dimensions (seller) | 1.94"D x 5.13"W x 3.38"H | Retailer |
| Voltage | 24 V AC | Retailer |
| Power | ac | Retailer |
| Works with | Touch | Retailer |
| Product weight | 5.6 ounces | Retailer |
| Material | Plastic | Retailer |
| Model name | ['Manual Humidistat'] | Retailer |
| Warranty | 5 Year Manufacturer | Retailer |
Strong points and weak points
Strong points
- 24 V AC
- Humidistat
Weak points
- Needs a whole-house unit to control
- Check system compatibility first
Wiring and install notes
- Compatibility statements are the maker's own. Confirm with the maker's compatibility checker, turn the power off before wiring, and leave line-voltage and furnace work to a licensed electrician or HVAC technician.
Thermostats to compare it with
FAQ
Can I install the Aprilaire 4655 Humidistat myself?
Other zoning and humidity controls with similar wiring
Our take
A fit for dry winter air.
Where to get it
The link goes to this exact model's listing. Check that the box includes the trim plate or C-wire adapter you need, and confirm your wiring with the maker's compatibility checker before you order.
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