Will it work with your system?
Works well with
- Simple, set-and-forget control
- Furnace and central air systems
Check first if you have
- Phone or voice control
- Line-voltage baseboard heat
What it controls
The Honeywell Home RTH5100B Non-Programmable Thermostat is a non-programmable. Its listing doesn't spell out which heating and cooling systems it supports, so run the maker's compatibility checker before you buy.
On power, the listing doesn't say whether it needs a C wire. What a C wire does.
The listing doesn't state heat pump support; if you have an O/B wire, confirm with the maker before ordering. Heat pump wiring.
Power, per the listing: Ac/dc.
Not sure of your wiring? The wiring checker reads your system from the terminal letters and checks it against this model's statements.
Also on the listing: a weight of 8 ounces and a digital.
Warranty, per the listing: 1 year limited warranty.
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 | RTH5100B | Retailer |
|---|---|---|
| Model name | Honeywell RTH5100B1025 Deluxe Manual Thermostat | Retailer |
| Works with | Push Button | Retailer |
| Features (seller) | Temperature Display | Retailer |
| Power | Ac/dc | Retailer |
| Voltage | 30 V | Retailer |
| Display | Digital | Retailer |
| Mounting / installation | Wall Mount | Retailer |
| Product weight | 8 ounces | Retailer |
| Warranty | 1 year limited warranty. | Retailer |
Strong points and weak points
Strong points
- Power: Ac/dc
- No Wi-Fi or account needed
Weak points
- No remote control
- Systems not stated
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
Does the Honeywell Home RTH5100B Non-Programmable Thermostat need a C wire?
What systems does the Honeywell Home RTH5100B Non-Programmable Thermostat work with?
Other programmable and basic thermostats with similar wiring
- Honeywell Home TH1100DV1000/U Non-Programmable Thermostat
- Honeywell Home TL7235A1003 Non-Programmable Thermostat
- Honeywell Home TH4110U2005/U Non-Programmable Thermostat
- Honeywell Home THP2400A1027W Programmable Thermostat
All programmable and basic thermostats in one grid · Every Honeywell Home control listed
Our take
Shortlist it for simple, set-and-forget control.
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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