Honeywell Lyric T5 vs. T6 Pro — What’s the Difference?

Lyric T5 vs Lyric T6 Pro

Honeywell has been providing thermostat solutions for residential and commercial applications for over 100 years. Two of its latest releases, the Lyric T5 and Lyric T6 Pro, are incredibly similar. They’re so alike that it’s nearly impossible to find anything online about the differences between the two. So, we did some research and have put together all the differences we could find between the Lyric T5 vs. Lyric T6 Pro thermostats.

Honeywell Lyric T5 vs. T6 Pro — The Differences

  • Difference #1: Ventilation – Lyric T5 does not support Universal Relay (U terminals) for ventilation, whereas the T6 Pro model can control ventilation equipment with ERV (Energy Recovery Ventilator) / HRV (Heat Recovery Ventilator) or damper.

  • Difference #2: Dual Fuel – A dual fuel heating system is a system that combines a heat pump with a gas furnace. The dual fuel system allows for more efficient heating and thus energy use. The Lyric T6 Pro is compatible with most dual fuel systems, whereas the Lyric T5 is not.

    And even though the Lyric app can walk you through configuring your Lyric T6 Pro to work with your heating system, please note that choosing the incorrect options for a dual fuel system can result in damage to your system. Just make sure to hire a professional to assess the requirements for your specific dual fuel configuration. If you’re looking for easier dual fuel thermostat integration, check out the Venstar Color Touch T7900. It can control humidity as well.

  • Difference #3: Wired Sensors – The Lyric T5 thermostat does not support Universal Input (S terminals) for indoor and outdoor sensors. Whereas the Lyric T6 Pro has an S/S terminal for both conventional and heat pump systems.

  • Difference #4: Color – The Lyric T5 thermostat comes in black, while the T6 model comes in white.

  • Difference #5: Installation – The Lyric T6 Pro Wi-Fi thermostat is for professional installation, so you would need to contact your local HVAC technician. Whereas the Lyric T5 Wi-Fi thermostat is designed for consumers and DIY applications.

  • Difference #6: Warranty – This difference is up to you, and here’s why: the warranty for Lyric thermostats depends heavily on two factors — where you buy it from and whether you install it yourself or with the help of a contractor. In general, it has a 2-year retail and 5-year trade warranty from the date it was installed.

    So, in case you want to get the 5-year warranty on the Lyric T5 or T6 Pro models, you’ll need to buy the thermostat from a professional contractor, either in-person or online, and have them install it for you. Check out the detailed warranty for Lyric thermostats on this Honeywell warranty page.


Lyric T5 vs. T6 — Important Differences Chart

Lyric T5Lyric T6 Pro
Vent Type ModesNone, PassiveNone, Passive, ERV/HRV,
Fresh Air Damper
Dual FuelNoYes
Wired SensorsNoYes
InstallationDIY or ProfessionalProfessional (suggested)
ColorBlackWhite
WarrantyDepends (2/5 years)Depends (2/5 years)
Install GuideLyric T5 PDFLyric T6 Pro PDF

Lyric T5 vs. Lyric T6 Pro — Our Thoughts

The choice between Lyric T5 vs. T6 Pro isn’t really too hard: it all depends on your HVAC system. So, before getting a Lyric thermostat, make sure to find out if you have a heat pump or dual fuel system, and whether your HVAC system has an S/S (wired sensor) and U (ventilation) terminals. This information will help you to make the right choice between Lyric T5 vs T6 Pro thermostats.

And if you’re looking for a simpler smart solution for your HVAC system, make sure to check thermostats from both ecobee and Nest. Here’s a detailed comparison between the two: Ecobee3 vs. Ecobee4 vs. Nest — What’s the Difference?

Our Score:
  • Lyric T5
  • Lyric T6 Pro
4.5

Let us know what you think!

If you had to choose between Lyric T5 vs. T6 Pro smart thermostat, what would you choose and why?


Last update on 2018-12-13 at 17:30 / Affiliate links / Images from Amazon Product Advertising API

8 Replies to “Honeywell Lyric T5 vs. T6 Pro — What’s the Difference?”

  1. Thanks for pulling this together! Not easy to find this type of information anymore. Not clear why. I do have a few questions but want to re-read first before typing something really stupid. Thanks again.

  2. I’ve been researching this theme for around two weeks at this point and this is the very first page that actually adds up. How come it’s so difficult to locate effective guidance involving security and safety these days? Absolutely respect the energy you spent getting your thoughts in to words so rookies just like me personally may take action. Could there be a part 2 to your page? Thanks again!

  3. Many thanks for putting this all together and saving me on the time and frustration it would have taken me to find on my own.

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