questionsany opinions about thermostats?

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We have a programmable Honeywell, and really like it. It also saves money by switching on and off automatically.

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I like mine well enough, but I don't remember the brand. It has separate times for day/weekend, with each having morning,noon,afternoon,evening,overnight. You can set max and min temps in each time period. I'm fairly liberal with my application of HVAC at home, so I'm not sure I'd notice any savings with a different thermostat. I think the savings you'd see all depends on how closely you can program the thing to match your lifestyle, along with utilities prices in your area.

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@khellendros1984: Not trying to be mean, but I am pretty sure that all thermostats turn off and on automatically. ;>)

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I pre-ordered the Nest thermostat: http://www.nest.com/

I should be receiving it at the end of the month.

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@90mcg112: $250? That's a lot of bacon for a t-stat.

We have a decent-quality Honeywell. It can be programmed differently every day, and up to 4 changes a day. I think I paid about $90 for it on eBay (brand new) maybe 7 years ago.

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Now in a condo with an external weatherhead, but back when I owned a house one of the first things I did was to replace the ancient day/night thermostat with a $70ish (19 years ago) electronic one that had three "days" (M-F, Sat, Sun) with four settings for each of the days.

Just as important as a more inteligent thermostat is to properly balance your heating system, especially if it is single pipe steam. (I won't go into the details unless someone wants them, but I reduced boiler run time by just under 25% and made the house more comfortable by replacing the steam vents and reducing the pressure cut out to 1PSI.)

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I like thermostats that have an recirculate or a "CIRC" setting for the fan. Most have Auto/ON some have Auto/CIRC/ON. Basically when the setting is selected it will make sure the fan runs like 30% of the time throughout the day regardless of weather the cooling is on. I like it because it keeps the bedrooms from getting too warm in the summer where people heat up the rooms while sleeping at night, without having the blower fan constantly running or the AC making the living room a freezer.

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I replaced the thermostat in my house a couple of years ago with an inexpensive (~$25) Honeywell that came with different settings for weekends and weekdays, 4 settings per day. I think I've reduced my energy expenses by about %10 overall.

There are a couple of features that I wish I did have:
-a backlit display (it's annoying to have to turn on a light to check the settings)
-a 7 day schedule (my wife and I are frequently and consistently gone at certain days/times but I can't really do anything about it)

One other thing that may be worth checking out - your utility company may have a rebate program that will send you money for installing a programmable thermostat. Since I have different companies for electric and gas and they both had rebate programs, I got paid twice to replace one thermostat ;)

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@jsimsace: Well, yeah...but not all of them are programmable for different time periods. My parents' is purely mechanical; couple vials of mercury to connect the current when the coils expand the right amount.

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@secretagentman02: Thank you for your suggestion- unfortunately my parents utility company only has thermostat rebates for commercial businesses- bummer...