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2 of 2 people found the following review helpful
3.0 out of 5 stars just what we needed It's not perfect - in fact I'm not in love with the ..., January 8, 2017
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This review is from: Honeywell TL8100A1008 Programmable Hydronic Thermostat (Tools & Home Improvement)
When we bought our new home back in September I really wanted to go to a wifi learning thermostat such as nest...unfortunately we discovered that our home is currently wired for line voltage & with other projects a greater priority conversion to low voltage had to be shelved...still, I wanted us to have something programmable instead of the old fashioned dial that was on the wall...enter this Honeywell mode - digital, programmable, configured for line voltage, just what we needed

It's not perfect - in fact I'm not in love with the programming system at all: you basically get two temperatures to set, one for daytime (sun button) and one for night time (moon button) - you can program time in 15 minute increments but only for these two temperatures, and only four adjustments per day...we were able to make it work with our schedule but it's nothing like others I've seen where you can adjust times & temperatures to whatever you wish

So all in all it's not perfect but... Read more

7 of 7 people found the following review helpful
5.0 out of 5 stars Quality Thermostat - Good Pump Cycling Feature, July 1, 2015
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This review is from: Honeywell TL8100A1008 Programmable Hydronic Thermostat (Tools & Home Improvement)
This is a nice quality thermostat. I have hot water heat with 4 zones. I replaced my very old thermostats with this model about a year ago. They have been working fine. They have adequate programing without getting too complex. A back-light would nice though. One very good feature they have that isn't publicized much is "circulating pump cycling". They will turn on the circulating pump(s) for 1 minute, once a day, every day. It appears they do the 1 minute cycle at 12:00 midnight. This is to help prevent the pumps from seizing due to non use such as during the summer. Therefore, don't shut off power to your system during any non-heating season or they won't be able to cycle the pump(s). A good method is to just set the thermostat on manual and drop the temperature setting to a low value.
Additional Note: Note that this is a heat only thermostat - no air conditioning control.

1 of 1 people found the following review helpful
5.0 out of 5 stars One of The Only Inline Voltage Thermostats Still Available, November 11, 2015
Verified Purchase(What's this?)
This review is from: Honeywell TL8100A1008 Programmable Hydronic Thermostat (Tools & Home Improvement)
One of the only thermostats I could find that will work with both 120V inline setup and 24 low voltage. I am using it for my oil hot water heating system which had two wires (120V) running to my very old Honeywell thermostat. Rather than convert to low voltage with a transformer and relay I purchased this thermostat. It has enough bells and whistles for my needs. I hooked it up in a few minutes and learned the programing in a few more minutes. You can set it to turn the temp up and down 4 times a day each day of the week. It also has a feature that will turn on the circulator pump for one minute every 24 hours to prevent any sort of pump seizure. A good price and two day Prime shipping was an added bonus for me. I would recommend this thermostat if you have an inline voltage system and do not want to convert to a low voltage system. If you already have a 24V system than I'd probably suggest you get a more high tech thermostat like the Nest or the Iris which is also wifi enabled.

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