What Is The Difference Between Honeywell T9 and T10?

A popular brand in the industry is Honeywell smart thermostats; they have a variety of models to choose from, such as T9 and T10 thermostats, if you’re in the market for a new one. So how are these two devices different?

In terms of functions, both the Honeywell T9 and T10 thermostats are similar, but the T10 offers a dual fuel mode. Depending on the wiring and pumps in your home, you may need two sources of heating and cooling, which the T10 can provide.

Many people are still confused about what dual fuel mode is and whether or not they will ever need it. No worries, we’ll go over all of the specifics here on the site. A few further distinctions between the two models will be discussed as well.

Difference Between Honeywell T9 and T10 (T9 vs T10)

Despite sharing many features with one another, the Honeywell T9 and T10 thermostats are distinguished by a number of key differences. The type of thermostat you should purchase is determined by your own tastes and the characteristics you desire in a thermostat.

The T10 also has the capacity to control humidifiers, dehumidifiers, and ventilation systems, among other things. The system is professionally installed, and the installer has a greater choice of installation options to choose from when synchronizing all of those indoor air quality equipment.

Specification Honeywell T9 Thermostat Honeywell T10 Thermostat
Voltage Powers At Low Voltage Powers At Millivolt and or Low Voltage
Virtual Assistant Google Assistant, Alexa, Siri Google Assistant, Alexa
Features Programmable Remote and Device Programmable Remote and Device
Screen Two Options(Touchscreen and Digital) Digital Only
Wiring/Installation C-wire, Wire-sensing, DIY More Wires, Professional Installation
Price $155+ depending on sensors $185+ depending on sensors
Controls Temperature Only Temperature, humidity, ventilation Of Room


1. Dual Fuel Mode

The most significant difference is the addition of the fuel mode, which was previously noted, as well as the additional settings on the T10. This implies that it is capable of controlling both your heat pump and your gas furnace in dual-fuel mode on the T10.

If your heat pump fails to operate or pauses, the gas furnace will immediately take over and regulate the thermostat setting to compensate. If you don’t have a gas furnace and aren’t concerned about the dual fuel mode, purchasing the T9 may be a more cost-effective option that will save you money in the long run.

What Is The Difference Between Honeywell T9 and T10?

If you aren’t sure whether or not you require dual fuel, you might consider having a professional come out and inspect your system and pump. Using this method can save you both money and time when searching for the ideal thermostat.

2. Professional Installation

The installation is yet another significant consideration to bear in mind. The T10 has significantly more wires than the T9, owing to its more sophisticated control mechanisms. The T10 is a difficult job to complete on your own.

What Is The Difference Between Honeywell T9 and T10?

In addition, the 5-year warranty is only valid if you can provide confirmation that the product was installed by a qualified professional. Attempting to install the T10 on your own might be tricky and may void your warranty completely. As a result, make sure you have an HVAC professional assist you with the installation.

3. Humidity And Ventilation Control

Using the T9 will not be possible if you wish to regulate the humidity and ventilation in your home. In comparison to the T10, the T9 can only monitor humidity and notify you if your levels are harmful. Nevertheless, it will not be able to adjust your humidity level.

4. Voice Assistance Control And Support

The T9 can also be operated by Siri, however, the T10 is not capable of doing so. It is possible that the T9 is a better pick if you only use Siri as your home assistant. Hence you can only use Google Assistant or Alexa as your voice assistant to control the T10 Honeywell Thermostat.

Wrap Up

Because the Honeywell T10 thermostat is capable of controlling both humidity and ventilation, it distinguishes itself from its predecessor, the T9. T10 is highly recommended if you have an intelligent home ventilation system and wish to increase the efficiency of your home.

The installation process varies as well, the T10 will require the services of a professional, whereas the T9 may be completed by the homeowner.

I hope you understood the difference between Honeywell T9 and Honeywell T10 Thermostat[1] and now you have decided which thermostat to install in your house. Let me know in the comment section if you are facing any problems with the decision I will be happy to help you.

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Further Read:

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  4. How To Unlock Honeywell Thermostat Quickly
  5. Quick Fix: Reset Honeywell Thermostat After Battery Change