Has anyone ever seen a heat / AC thermost where you set the temperature you want for heat or cool, and the thermosts automatically switches between heat and cool depening oon outdoor temperature?
I have some elderly friends who are having a tough time....
I think the ultimate solution will be assisted living but they are fighting that.
I don't blame therm. There is a service in many places where someone
drops in every so often to see how things are going. Maybe every day,
maybe less often. Maybe he cooks or brings one good meal a day. It's
paid for or free, depending on where you are and how much money they
have. It's a heck of a lot cheaper for all concerned than assisted
OTOH, assisted living provides 3 hot meals a day and the chance to meet
people one's own age and some places have lectures, classes, courtesy
bus to the shopping center. One had a wood-working shop, about as nice
as the 7th grade woodshop. One of them had guaranteed admission when
the time comes to the nursing home associated with it, in a city where
it can be hard to get into a very good nursing home. But the big
problem is, Where do keep your baby grand piano, your bicycle, your
other bicycle, your floor jack, your ramps, your inflatable boat, your
small floor jack, your three large cartons of receivng tubes, your
carton of motors, carton of relays, carton of clocks, carton of AC
connectors, box of adapters, pieces of dowel rod of every popular size,
12 cans of partly used spray paint, 15 kinds of glue, your 22 volume set
of radio service manuals covering 1930 to 1944. (I forget their title
but they're famous. They were the predecessor to Sams, whose daughter I
went to high school with), your vcr, your spare vcr because you know
most vcrs are ready to break, your spare spare vcr for when the second
on one breaks. (speaking of brakes) your brake tools for redoing disk
brakes, and drum brakes if you ever get the 69 Buick Riviera Convertble
you've always wanted, your Victrola that your mother bought new in 1921,
your Hallicrrafter shortwave that your cousin Lou bought new in 1944,
your room heater that your mother bought new because you were born in
And this just scratches the surface.
The thermostats they took out of my church last
year did just that. Honeywell, and not sure what
model. They can also choose from occupied or not
At church we wet occupied for 69-72 degrees F, and
64-79F for not occupied. They would heat or cool,
Close match, found on web.
Honeywell RH7400 (I think that's the model): auto-switching is not the
default (IIRC) but an option somewhere. We don't have ours set to
autoswitch because there's a non-automated control in our system that
has to be changed from Summer to Winter to enable the humidifier.
On Monday, May 25, 2015 at 6:37:09 PM UTC-4, bob haller wrote:
The Honeywell VisionPro will do that. It's an option on the
install menu. You should check the manual for the particular
model to make sure it includes it, not sure if they all do.
Personally, I wouldn't want it as it's likely it's going to
use more energy. I don't want mine kicking on to cool if it's set
to 74 and it happens to go to 77 during a spring day.
On Tue, 26 May 2015 06:09:58 -0700 (PDT), trader_4
I actually like it when mine does that. It reminds me to change the
filter and clean the compressor coils for the season. (I do change
the settings between winter and summer, though. I lower the heat
setting during the colling season and raise the cool setting in the
heating season so the system doesn't often do both in the same day).
On Tuesday, May 26, 2015 at 9:14:59 AM UTC-4, Pat wrote:
If anything, having it change by itself would seem to me to
be less likely to remind you to do cleaning than if you change
it from Heat to AC manually.
I lower the heat
But if the thermostat is making it's own call on when to switch
there is no heating season, no cooling season. It switches on it's own.
And if you do what you just said, with auto switchover, it gets
worse. Let's say you have manual changeover. So, it's spring
and you have it set to 77, AC mode, it's a mild day and it's 72 right now
in the house. It won't go on. If you have it set for auto changeover,
it will go on and fire up the furnace to get it to 77.
Properly programmed, it would not, but I don't know if such a device
exists. It should be set that AC will not go on if the outside
temperature is less than 80, heat will not go on if outdoor temp is
above 68. Of course, you need an outdoor probe to do it right.
Then there is humidity control. Many years ago my father was the plant
manager for a printing plant. A few days a year is would be very humid
so they would run both the heat and AC at the same time. That 65 degree
air at 100% humidity would raise hell with the paper.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.