⚡ Quick Answer
The Ecobee SmartThermostat Premium (~$219) is the best smart thermostat for heat pumps in 2025 — it supports multi-stage heat pumps with auxiliary/emergency heat, includes a room sensor, and works with every major smart home platform including Apple HomeKit. On a tighter budget, the Sensi Touch 2 (~$139) is a reliable runner-up with solid heat pump compatibility. The Honeywell Home T10 Pro (~$170) is the top pick for multi-zone heat pump setups.
Table of Contents
Why do heat pumps need a different thermostat?
Heat pumps operate differently from standard furnace/AC systems — and a thermostat that doesn't understand this difference can cost you significantly more on energy bills, or even damage your equipment.
Unlike a furnace that either fires or doesn't, a heat pump has multiple operational modes: primary heat pump heating, auxiliary electric resistance heat (for very cold days), emergency heat (bypasses the heat pump entirely), and cooling. A compatible smart thermostat must:
- Support an O/B reversing valve wire (tells the heat pump whether it's heating or cooling)
- Manage auxiliary heat lockout — preventing the expensive electric strip heat from kicking in at mild outdoor temperatures where the heat pump is more efficient
- Support multi-stage operation if your system is two-stage
- Handle the full wiring configuration, typically: Y1, Y2, W1 (aux), W2 (emergency), G, R, C, O/B
Best Overall: Ecobee SmartThermostat Premium (~$219)
Ecobee SmartThermostat Premium
The definitive heat pump thermostat: full multi-stage support, built-in room sensor, Alexa speaker, Apple HomeKit, Google Home, and SmartRecovery for efficient ramp-up. Works with virtually every heat pump on the market.
Check Price on AmazonThe Ecobee SmartThermostat Premium is the best smart thermostat for heat pumps because it handles every heat pump configuration with grace — from simple single-stage units to complex two-stage systems with auxiliary and emergency heat. It supports up to 2 stages of heating, 2 stages of cooling, and a dedicated auxiliary heat output, covering the wiring needs of virtually every residential heat pump system.
Key specs and features
- Display: 3.5-inch color touchscreen at 480×480 px
- Wiring support: Y1, Y2, W1, W2, G, R, C, O/B — full heat pump wiring
- Included SmartSensor: Monitors temperature in a second room to eliminate hot/cold spots
- Built-in microphone & speaker: Full Alexa functionality without a separate Echo device
- Smart home platforms: Apple HomeKit, Amazon Alexa, Google Home, Samsung SmartThings
- SmartRecovery: Calculates when to start heating/cooling to hit your target temperature exactly at the scheduled time — important for heat pumps that ramp up slowly
- Aux heat lockout: Configurable temperature threshold below which auxiliary heat is allowed to engage, maximizing heat pump efficiency
- Wi-Fi: 802.11 b/g/n, dual-band 2.4/5 GHz
- Warranty: 3 years
The SmartRecovery feature deserves special mention for heat pump users. Because heat pumps heat more slowly than furnaces, a thermostat needs to start the heating cycle earlier to hit your scheduled temperature on time. Ecobee's algorithm accounts for this automatically, something simpler thermostats miss entirely. Independent testing suggests Ecobee users with heat pumps save an average of 23% on heating costs compared to manual thermostats.
Best Budget Pick: Sensi Touch 2 (~$139)
Sensi Touch 2 Smart Thermostat
Solid heat pump compatibility at a wallet-friendly $139. Supports multi-stage heating/cooling and auxiliary heat. Clean touchscreen display, works with Alexa, Google, and HomeKit.
Check Price on AmazonThe Sensi Touch 2 is made by Emerson — a company that has been making HVAC controls for over 100 years — and it shows. The thermostat has excellent heat pump compatibility at a price point $80 below the Ecobee SmartThermostat Premium.
Key specs and features
- Display: 3.5-inch color touchscreen
- Heat pump support: Up to 2-stage heat pump with auxiliary heat, O/B reversing valve
- Smart home platforms: Amazon Alexa, Google Home, Apple HomeKit, SmartThings
- Flex scheduling: 7-day flexible scheduling with up to 4 periods per day
- Wi-Fi: 2.4 GHz 802.11 b/g/n
- Installation: Wiring labels guide on app, no C-wire required for most systems
- Warranty: 5 years — the longest warranty in this roundup
The Sensi Touch 2 doesn't learn your schedule automatically (you set it manually), and it lacks the room sensor that makes the Ecobee so effective for multi-room comfort. But for users who want a reliable, well-supported heat pump thermostat without extra bells and whistles, the Sensi Touch 2 at $139 with a 5-year warranty is an outstanding value.
Best for Multi-Zone: Honeywell Home T10 Pro (~$170)
Honeywell Home T10 Pro Smart Thermostat
Professional-grade heat pump thermostat with room/occupancy sensor support, multi-zone compatibility, and a clean 3.5-inch touchscreen. Ideal for larger homes with zoned HVAC.
Check Price on AmazonThe Honeywell Home T10 Pro is marketed as a professional-grade thermostat, and its heat pump feature set lives up to that billing. At $170, it sits between the Sensi and Ecobee in price but offers unique advantages for homeowners with zoned HVAC systems or those who want room sensors without paying the Ecobee premium.
Key specs and features
- Display: 3.5-inch color touchscreen
- Heat pump support: Up to 3-stage heat pump with auxiliary and emergency heat
- Room sensors: Compatible with Honeywell T6 Pro Room Sensors (sold separately, ~$35 each)
- Zoning: Compatible with Honeywell's TrueZONE and other zone control systems
- Smart home platforms: Amazon Alexa, Google Home (no HomeKit)
- Wi-Fi: 802.11 b/g/n, 2.4 GHz
- Warranty: 5 years
The T10 Pro's support for 3-stage heat pump systems is uncommon at this price and makes it valuable for homes with premium variable-speed heat pumps. Its room sensor ecosystem is also more flexible than Ecobee's — sensors are cheaper at $35 each vs. $79 for a 2-pack of Ecobee SmartSensors.
Side-by-Side Comparison
| Feature | Ecobee Premium ($219) | Sensi Touch 2 ($139) | Honeywell T10 Pro ($170) |
|---|---|---|---|
| Heat Pump Stages | 2-stage + aux | 2-stage + aux | 3-stage + aux |
| Included Room Sensor | Yes (1 included) | No | No (sold separately) |
| Apple HomeKit | Yes | Yes | No |
| Auto-Schedule Learning | Yes | No | No |
| Built-in Alexa Speaker | Yes | No | No |
| Aux Heat Lockout | Yes | Yes | Yes |
| Warranty | 3 years | 5 years | 5 years |
| Price | $219 | $139 | $170 |
What to look for in a heat pump thermostat
Before purchasing, confirm these key compatibility points:
- O/B wire support: Every heat pump thermostat must support this reversing valve wire. No O/B support = not heat pump compatible.
- Auxiliary heat control: If your heat pump has electric strip auxiliary heat (most do in cold climates), the thermostat must support it via a W1 or AUX terminal.
- Number of stages: Check your heat pump's spec sheet. Most residential units are single or two-stage; high-efficiency variable-speed units may need 3-stage support.
- C-wire availability: Heat pump systems almost always have a C-wire available — confirm before purchasing.
- Smart home ecosystem: Apple HomeKit users must choose Ecobee or Sensi Touch 2; Nest users are limited to Google Home.
⭐ Our Verdict
Best Overall: Ecobee SmartThermostat Premium ($219) — The most capable heat pump thermostat available at any reasonable price. Multi-stage support, an included room sensor, SmartRecovery, Alexa built-in, and universal smart home platform support make it the clear winner for heat pump homes.
Best Budget: Sensi Touch 2 ($139) — Solid heat pump compatibility from a trusted HVAC brand, with a 5-year warranty that beats the competition. Lacks auto-learning, but everything you need is here at a fair price.
Best for Zoning: Honeywell Home T10 Pro ($170) — The right choice for multi-zone heat pump homes, with 3-stage support and an affordable room sensor expansion ecosystem.
Frequently Asked Questions
Can I use a Nest thermostat with a heat pump?
Only the Nest Learning Thermostat ($249) supports heat pumps with auxiliary heat. The cheaper Nest Thermostat E and base Nest Thermostat do not support heat pump wiring. Always check the compatibility chart at nest.com before buying.
What is auxiliary heat lockout and why does it matter?
Auxiliary heat lockout prevents the backup electric resistance heat strips from engaging when outdoor temperatures are mild enough for the heat pump to work efficiently alone. Without it, your aux heat may run unnecessarily, costing 2–3x more to operate than the heat pump alone.
Do I need a C-wire for a heat pump thermostat?
Heat pump systems almost universally have a C-wire (common wire) because the system requires continuous power. If yours doesn't, a C-wire adapter or add-a-wire kit can resolve this, but it's rare for heat pump installations.
What does the O/B wire do on a heat pump thermostat?
The O/B wire controls the reversing valve — the component that switches the heat pump between heating and cooling mode. Thermostats without an O/B terminal cannot control heat pumps. Most are "O" type (energized in cooling), but some older systems use "B" type (energized in heating).
How much can a smart thermostat save on a heat pump system?
Studies suggest 10–23% energy savings depending on previous behavior. The biggest gains come from optimized auxiliary heat lockout and smart scheduling — preventing expensive backup heat from running unnecessarily is often worth $100–$300 per winter season in cold climates.
Is the Ecobee SmartThermostat Premium worth the extra cost over the Sensi Touch 2?
If you want auto-schedule learning, an included room sensor, Apple HomeKit, or a built-in Alexa speaker, yes — the extra $80 is well justified. If you're happy to set a manual schedule and don't use HomeKit, the Sensi Touch 2 saves you money with equivalent heat pump support.
SmartWired participates in the Amazon Associates Programme. We may earn a commission from qualifying purchases at no extra cost to you.