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Twelve white rectangular wall thermostats with blue LCD screens showing temperature and humidity

Mroinge M721 Non-Programmable Heat Pump HVAC Control 2H/1C 24V 12 Pack

SKU CH-K9TD-9Q8FF MPN M721

A 12-pack of non-programmable 24V heat-pump thermostats with large temperature and humidity display, battery or C-wire power, and compressor delay protection

  • Rated voltage24 V AC
  • Mounting styleWall Mount
  • Relay contactHeat Pump Thermostat, 24 V AC
  • Certifications and standardsNot capable emitting RF energy
  • Product typeTemperature Sensor, Manual, Push Button
  • Size or dimensions0.99 in × 4.92 in × 3.73 in
  • Non-programmable heat pump control up to 2H/1C
  • Large LCD shows temperature and humidity clearly
  • Powered by 24 VAC or two AAA batteries no C-wire
  • Compressor delay protection extends equipment life and saves energy
  • Temperature calibration ensures accurate indoor climate control

12-Pack Non-Programmable Heat Pump Thermostat

The Mroinge M721 is a non-programmable heat pump thermostat sold in a 12-pack for residential heating and cooling control. It supports up to two heating stages and one cooling stage with a large LCD showing room temperature and humidity. The unit is designed for straightforward manual operation via push buttons.

Check 24 VAC Compatibility Before Ordering

This thermostat requires a 24 VAC power source or two AAA batteries and will not work with 110-240 V HVAC systems, 120/240 V electric baseboard heat, or RV thermostats. Verify that your existing wiring provides a low-voltage 24 VAC supply and that your system is a compatible heat pump or central gas, oil, or electric furnace.

Wall-Mount Design with Battery or C-Wire Power

The blue housing measures 0.99 in x 4.92 in x 3.73 in and mounts directly to the wall. It can run on 24 VAC or two AAA batteries without a C-wire, offering flexible installation. Features include temperature calibration and compressor delay protection to reduce short-cycling and extend equipment life.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $41.99
Typical for this category: the median of 1,762 items is $45.99.

Specifications

Product
Brand nameMroinge
Model nameM721
Part numberM721
Product typeTemperature Sensor, Manual, Push Button
Product colorBlue
Power
Rated voltage24 V AC
Size & build
Size or dimensions0.99 in × 4.92 in × 3.73 in
Mounting styleWall Mount
In the box
Number of items12 pack
Environment & compliance
Certifications and standardsNot capable emitting RF energy
More details
Relay contactHeat Pump Thermostat, 24 V AC

Questions about this item

Does the 12-pack include batteries or a C-wire adapter, or must I buy them separately?

The 12 thermostats run on 2 AAA batteries each or a 24 VAC supply; batteries and any C-wire hardware are not included.

Should I choose the 2H/1C model if my system has two heating stages and one cooling stage?

Yes, this M721 supports up to two heat stages and one cool stage on compatible heat-pump or conventional furnace systems.

What does the 24 VAC rating mean when the thermostat is mounted on the wall?

It connects to the low-voltage control wires from your furnace or air handler; it will not work on 110–240 V line-voltage or millivolt systems.

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