Thermostats

Your thermostat runs your heating and cooling, so it shouldn't depend on a cloud service. When one maker ended support for its early smart thermostats, owners lost app and remote control, though schedules kept running on the device. You set these programmable models on the thermostat itself. Each listing shows what we've checked.

Each category lists the models we've checked so far and shows the tests that matter for that kind of product.

3 models listed Last checked Oct 25, 2026

Each model below links to its source, checked on Oct 25, 2026. Our evidence is the maker's own page; retailer pages only show a model is on sale. We don't show prices.

Current models 3

Honeywell Home RTH20B

X2P programmable thermostat, single-stage 1 heat/1 cool, 5-2 day schedule

Listed; tests pending evidence

What we know: Honeywell Home says it's powered by 2 AA batteries (not included). Not confirmed yet: whether any feature needs an app or a sign-in, which features you can use right on the thermostat, and whether anything needs a subscription.

Evidence "Powered by 2 AA batteries (not included)" (per Honeywell Home product page, checked Oct 2026). In stock at Home Depot as the RTH20B/N as of Oct 25, 2026.

Source Honeywell Home X2P product page
In stock at Home Depot (RTH20B/N) as of Oct 25, 2026

Last checked Oct 25, 2026

Spec page on honeywellhome.com

Full specs

Honeywell Home RTH21B

X2P programmable thermostat (flexible scheduling)

Listed; tests pending evidence

What we know: Honeywell Home says it's powered by 2 AA batteries (not included). Not confirmed yet: whether any feature needs an app or a sign-in, which features you can use right on the thermostat, and whether anything needs a subscription.

Evidence "Powered by 2 AA batteries (not included)" (per Honeywell Home product page, checked Oct 2026). In stock at Home Depot as the RTH21B/N as of Oct 25, 2026.

Source Honeywell Home X2P product page
In stock at Home Depot (RTH21B/N) as of Oct 25, 2026

Last checked Oct 25, 2026

Spec page on honeywellhome.com

Honeywell Home RTH22B

X2P programmable thermostat, conventional/heat pump, flexible schedule

Listed; tests pending evidence

What we know: Honeywell Home says it's powered by 2 AA batteries (not included). Not confirmed yet: whether any feature needs an app or a sign-in, which features you can use right on the thermostat, and whether anything needs a subscription.

Evidence "Powered by 2 AA batteries (not included)" (per Honeywell Home product page, checked Oct 2026). In stock at Home Depot as the RTH22B/N as of Oct 25, 2026.

Source Honeywell Home X2P product page
In stock at Home Depot (RTH22B/N) as of Oct 25, 2026

Last checked Oct 25, 2026

Spec page on honeywellhome.com

Not listed yet

These models are not listed yet. Either we couldn't confirm they're currently sold, or the spec page was ambiguous.

  • Honeywell Home X1N (RTH11B) non-programmable: We didn't find it at a major retailer on Oct 25, 2026. (source)
  • Honeywell Home T4 Pro (TH4110U2005): Honeywell spec: WiFi: No. Sold mainly through professionals, and Home Depot lists it under another brand name, so retail availability isn't clear. (source)
  • Honeywell Home T5 7-Day Programmable (RTH7560E): Excluded: Honeywell's spec table for this listing says WiFi: Yes, which doesn't match how retailers describe it. Left off until it's clear. (source)
  • Others (Emerson/Copeland, Braeburn, AprilAire) : Not checked yet.

Notes

Before you buy: check your wiring and system type (single-stage, multistage, heat pump, or line-voltage baseboard). Line-voltage baseboard heaters need a different kind of thermostat.

Retailer listings use the trailing letters differently (e.g. RTH20B/N at Home Depot). The model family is what matters.

Spotted a mistake or a model that has changed? Tell us.