toggleswitch
Well-known member
:-0
Thank you Glenn.
Thank you Glenn.
Check out my drawers
- Thread starter jasonl
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sudsmaster
Well-known member
Toggle,
What I meant to add was that heat pumps that use earth/water heat exchangers can be used far to the north of where air heat exchangers become inefficient. That's because, as I'm sure you're aware, the earth/water table stays at a fairly constant 55-60 degrees or so regardless of latitude.
What I meant to add was that heat pumps that use earth/water heat exchangers can be used far to the north of where air heat exchangers become inefficient. That's because, as I'm sure you're aware, the earth/water table stays at a fairly constant 55-60 degrees or so regardless of latitude.
gas/electric switch
yeah, here's what that switch does, as far as what i understand.
with a gas furnace, when the thermostat signals heat, the burners light and run for a few minutes to preheat the exchanger, then the fan starts. when the thermostat says the set temp has been reached, it shuts off the burners but keeps the fan running a few minutes to get as much residual heat out of the exchanger as possible.
when you turn the thermostat to "electric" the thermostat does not preheat the exchanger or leave the fan running after the set temp because electric furnaces are instantly hot, and practically instantly cold. so there's no need to delay the fan in any case.
that's all. i've tried it with my Hunter digital thermostat. Our apartment has a gas furnace, and when it's set to "electric" the fan delays are eliminated.
yeah, here's what that switch does, as far as what i understand.
with a gas furnace, when the thermostat signals heat, the burners light and run for a few minutes to preheat the exchanger, then the fan starts. when the thermostat says the set temp has been reached, it shuts off the burners but keeps the fan running a few minutes to get as much residual heat out of the exchanger as possible.
when you turn the thermostat to "electric" the thermostat does not preheat the exchanger or leave the fan running after the set temp because electric furnaces are instantly hot, and practically instantly cold. so there's no need to delay the fan in any case.
that's all. i've tried it with my Hunter digital thermostat. Our apartment has a gas furnace, and when it's set to "electric" the fan delays are eliminated.
sudsmaster
Well-known member
In my gas forced air furnace, the time delay for the fan is built into the furnace - the thermostat merely tells the furnace when heat is needed, or not needed. The wall thermostat is merely an on/off signal. So the gas/electric switch (if it exists on my Lux 1500 at all) isn't used.
One of these days I'd like to figure out how to shorten the delay on the device attached directly to the furnace. But it's in the crawl space with the furnace... not a nice place to work, and the device didn't come with any clear instructions on how to change the delay.
One of these days I'd like to figure out how to shorten the delay on the device attached directly to the furnace. But it's in the crawl space with the furnace... not a nice place to work, and the device didn't come with any clear instructions on how to change the delay.
My (non-gas) system has a blower turn-off delay (but no delay for turn-on) in both heat and cool modes.
Sometimes the blower delay, particularly on a gas furnace, is controlled by a plenum or heat-exchanger thermostat. This is to prevent a blast of cold air if the blower was to start before the heat-exchanger is heated up, and to get a but more efficiency by pulling the residual heat until it cools off.
Sometimes the blower delay, particularly on a gas furnace, is controlled by a plenum or heat-exchanger thermostat. This is to prevent a blast of cold air if the blower was to start before the heat-exchanger is heated up, and to get a but more efficiency by pulling the residual heat until it cools off.
jasonl
New member
Show us your thermostats
The analog roundie has a heat anticipator setting that is great to tweak the heater cycle so it doesn't get too hot in the house. When I was living in that trailer I went from the default 4 to like 3.75. The slide lever was moved about 1mm but it made a difference. Then I found the Round Digital and it worked perfectly right out the box. In my new house, I set it for electric heat cycle rate and Fan on.
The t-stat in my office is a Trane which is a rebadged Honey. It's a 5-2 programmable but I just keep the setpoint held at 73 because the AC here is underpowered.
Skip, keep them window units running. Not having AC here in Lousiana is torture.
The analog roundie has a heat anticipator setting that is great to tweak the heater cycle so it doesn't get too hot in the house. When I was living in that trailer I went from the default 4 to like 3.75. The slide lever was moved about 1mm but it made a difference. Then I found the Round Digital and it worked perfectly right out the box. In my new house, I set it for electric heat cycle rate and Fan on.
The t-stat in my office is a Trane which is a rebadged Honey. It's a 5-2 programmable but I just keep the setpoint held at 73 because the AC here is underpowered.
Skip, keep them window units running. Not having AC here in Lousiana is torture.
Jason You got that right for sure. I have to say I have one 220 and 2 110's in the house and the house believe it or not is very comfortable, as far as winter time, this old house is so well insulted that We run 3 electric radiator heaters and the house is very warm with them
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