I've been a lurker here for a long time. I get a kick out of the wall of shame. I've owned seven houses, and each one had HVAC / electrical plumbing issues
that could have made the wall.
What I'm asking for today is some advice on thermostats. I have a 1960's ranch house here in San Jose that has some nice energy efficiency features like a living room vaulted ceiling with no insulation. Hey everybody knows that by the 70's nuke plants will make electricity too cheap to meter.
When I had a new 80% eff. Trane furnace and 4 ton SEER 12 system installed 6 years ago they gave me a crummy White Rodgers thermostat.
I went and replaced it with a Honeywell Chronotherm IV Plus. I guess some of you guys would consider that DIY. This may not endear me to you but I have a master's degree in electronics and can wire a stat. When I want the refrigerant checked I'll call one of you guys.
Anyhow the thermostat is on an interior wall right next to the main return duct. In both summer and winter when returning the thermostat from setback (or setup?) I have a couple of hours for which the thermostat reads a couple degrees lower in summer, and higher in winter than what a thermometer in the same location reads. I believe this is because the stat
is somehow reading the temperature of the wall. ( An idea first patented in
1939 Patent 2158435 )
I don't want to go to a zoned system ( my ducts are already pathetically
small that I had replaced 6 years ago, but I figure I'm moving 350 CFM per ton, which is not good, but not terrible )
What I want to know is there a good residential thermostat (system )
with multiple sensors. Or failing that, just a digital thermostat where I
can tweak or turn off the wall measurement feature?
You probably will be offended that I have a 4 ton system in a 1700 ft^2
house. But that's what the contractor put in when I bought the house and
was starting a new job and not paying attention. And it can drop the temp.
here on a 105 degree day. Fortunately humidity removal is not a big issue here.
Over the last twenty years I have paid contractors for 3 new central Air systems, one heat pump and two gas furnaces. (In seven different homes)
While I haven't funded the HVAC industry like I have Realtors, you folks haven't done too badly on me.
Anybody know a good thermostat? Aprilaire?