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 zzzzsetbackthermostat.htm Setback thermostat: Although a thermostat is the brain which starts and stops every central heating system, most home owners pay little or no attention to this important little device until it actually fails to work. Thermostats are fairly delicate instruments which should not be tampered with by the average person, but there are some things you should know about that can make a considerable difference in how your system operates and, in fact, whether or not it operates at all. First of all, if the unit is more than about fifteen years old it is probably a good idea to replace it entirely with a new one. New ones operate more efficiently, with fewer spells of excessive heating or cooling, and they keep the temperature closer to the setting you desire. Setback thermostats can be purchased that have built-in timers or computers that can be programmed so that the heat will be turned down automatically each night, and up before you rise in the morning and conversely for cooling. There are two major types of setback thermostats the mechanical type and the electronic type. The more sophisticated, computerized models allow for multiple setbacks (or temperature changes) each 24 hour period. They can change the setting several times a day while everyone is out, yet return the setting to the proper comfort level just before everyone comes home. Be aware that the inspector does not check the accuracy of thermostats. If you find your thermostat to be grossly inaccurate a qualified heating contractor may be able to recalibrate it, but most thermostats will need replacement. Thermostat built-on unit Zoning system: Prefabricated fireplaces zero clearance fireplaces Masonry fireplace proportion
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