The best smart thermostat
We installed 8 smart thermostats in three homes with furnaces and heat pumps. The WarmWise 3 saved the most energy without sacrificing comfort.
Jake Morrison
Ryan Mitchell, editor-in-chief
September 1, 2026
12 weeks · 8 models
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In this guide
Our picks at a glance
WarmWise 3
Thermi Go
WarmWise Pro
Prices checked September 30, 2026 at 9:00 a.m. ET. Prices may change.
Why you can trust us
Jake Morrison spent ten years as an HVAC technician and has tested tools and smart home products since 2023. For this guide we tested 8 models over 12 weeks in our test house. We bought most models ourselves; loaned units were returned after testing. Manufacturers don’t see our conclusions before publication.
Who is this for?
How we tested
We installed each thermostat ourselves and tracked energy use for twelve weeks, compared with a regular programmable thermostat. We also tested the app and integration with Google, Alexa and HomeKit.
Test setup in our test house in Columbus. Photo: BrasQ
Our full test methodTest results compared
| Model | Rank | Test score | Price from |
|---|---|---|---|
| WarmWise 3 | Our pick | 8.9 | $219 |
| Thermi Go | Budget pick | 7.9 | $119 |
| WarmWise Pro | Upgrade | 9.1 | $299 |
Test score based on our fixed weighting scheme. Price from: lowest price on September 30, 2026.
Frequently asked questions
Does a smart thermostat work with every HVAC system?
How much do you really save?
- Test protocol for smart thermostats, BrasQ (2026)
- Manufacturer specifications and manuals
- Prices and availability checked.
- First version published after testing 8 models.
Jake spent ten years as an HVAC technician installing furnaces and heat pumps. Since 2023 he has tested tools and smart devices for BrasQ. He has renovated two houses himself.
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