Best Thermostat With Auxiliary Heat for Heat Pump Systems
Answering your search for a thermostat with auxiliary heat, this guide highlights top options that work well with heat pump systems that include aux or emergency heating. Each product is suited for specific setups—choose based on compatibility, ease of installation, and display clarity. Below you’ll find a quick buying table and five carefully chosen thermostats, with clear pros and limits to help you decide which model fits your home HVAC arrangement best.
| Product | Best For | Key Benefit |
|---|---|---|
| Aowel AW721 | 2H/1C heat pump systems | Recordable humidity/temperature monitoring on a backlit display |
| Riseem Non-Programmable | Easy DIY installs | Dual power (24VAC or batteries) and no C-wire required in many setups |
| Heagstat H721 | Manual control lovers | Straightforward 2H/1C operation with emergency heat option |
| Suuwer S721 | Mid-range compatibility | Blue backlit display and clear wiring guidance |
| Honeywell Home RTH20B | Single-stage setups with 5-2 schedule | Flexible scheduling and large display |
Aowel 2 Heat/1 Cool Non-Programmable Thermostat
Best for two-heat/one-cool heat pump or conventional single-stage systems that include aux or emergency heat. The AW721 supports up to 2H/1C and features a room temperature and humidity monitor on a backlit display. It’s suitable for buyers seeking straightforward, non-programmable operation with clear status indicators. A key caution: verify system compatibility and the wall cutout size to match your existing opening before purchasing, as fit can vary.
Riseem Thermostat For Heat Pump, Non-Programmable
Best for simple homes needing quick DIY installation and clear, readable controls. This thermostat supports 2H/1C heat pump configurations and can be powered by 24VAC or two AAA batteries, reducing wiring constraints. It does not require a C-wire on most systems, making it a practical pick for setups with limited wiring. It’s less suited for advanced multi-stage or electric-baseboard configurations—useful for straightforward heat pump or single-stage systems.
Heagstat H721 Non-Programmable Heat Pump Thermostat
Best for users who want straightforward manual control of a 2H/1C heat pump with emergency heat. The H721 supports manual operation for cool/heat and emergency heating. It does not work with certain multi-stage or high-voltage configurations, so verify your system type and wiring before purchase. This model is chosen for reliability in basic heat-pump setups where simple, intuitive control is preferred over advanced programming.
Suuwer Non-Programmable Heat Pump Thermostat
Best for households needing a backlit display with dependable 2H/1C heat pump operation. The Suuwer S721 is compatible with heat pumps that include aux or emergency heat and frequently works with most 24V conventional single-stage systems. A noted limitation is that wiring accuracy is important; incorrect wiring can affect performance. Choose this for a balanced blend of readability and straightforward operation.
Honeywell Home X2P Programmable Thermostat
Best for users who want flexible scheduling with a 5-2 day program and a large viewing display. The RTH20B offers programmable control and a straightforward setup, serving homes with regular routines. Although it’s programmable, it’s included here for compatibility with single-stage heating and cooling. It may lack advanced multi-stage or emergency-heat specific features found in higher-end models.
Buying Guide
How to choose the right thermostat with auxiliary heat:
- System compatibility: Confirm your heat pump supports aux or emergency heat and matches the thermostat’s 2H/1C or other configurations.
- Power source: Look for 24VAC power or battery power options; ensure your wiring supports the chosen model, especially if a C-wire is required.
- Programming needs: Decide between programmable and non-programmable models based on your schedule requirements and desired energy savings.
- Display and usability: A backlit display and intuitive controls improve daily use, particularly for older adults or visually sensitive users.
- Installation ease: For DIY installation, prefer models with universal sub-base and clearly labeled terminals; consider wall compatibility and old-wall cutouts.
- Limitations: Some models do not support multi-stage heat pumps or high-voltage systems. Always check manufacturer compatibility notes before purchasing.
Frequently Asked Questions
- What is auxiliary heat on a heat pump?
Auxiliary heat is an extra heat source used when the heat pump alone cannot reach the desired temperature, often electric resistance heat activated during very cold conditions. - Do all thermostats support auxiliary heat?
No; compatibility varies. Look for models labeled for heat pump systems with aux or emergency heat. - Is a C-wire required for these thermostats?
Some require a C-wire; others work with batteries or do not need a C-wire. Verify with your installed HVAC wiring. - Can I install these thermostats myself?
Many are designed for DIY installation, but confirm wiring, compatibility, and wall opening size before proceeding. - Which thermostat is best for a simple setup?
Non-programmable models with clear displays, like Aowel AW721 or Riseem, are good for straightforward heat pump configurations. - What should I avoid when choosing a thermostat for a heat pump?
Avoid models not supporting auxiliary heat or those incompatible with your system’s voltage and stage configuration.