Re: more fun with air conditioning
From: TURTLE (turtle_at_worldnetla.net)
Date: 07/23/04
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Date: Thu, 22 Jul 2004 19:45:25 -0500
"J Jensen" <jjensen14@hotmail.com> wrote in message
news:c3f2060d.0407221116.4fd3587f@posting.google.com...
> In regards to the recent posting I saw about running the a/c or opening the
> windows, I would like to list several statements that people have made to
> me about air conditioning. The location is Texas, where the temperature
> is about 75 F at night and 100 F at the hottest part of the day.
>
> 1. Keeping the a/c cooling the house all day uses less electricity than
> turning it off and then back on in the evening or when you return from
> a vacation.
>
> 2. Running the a/c a few degrees colder at night cools the big cement slab
> that the house is built on, and thus saves electricity during the day
> (the a/c is set back to normal living temperature during the day).
>
> 2b. If the temperature inside the house reaches 78 F at 10 AM on both days
> with the a/c set colder the previous night, and also when it was just
> set normally the previous night, then that proves setting it colder made
> no difference.
>
> 3. The a/c uses less current at night ( you measure it with an ammeter as
> it is running ).
>
> 4. The a/c uses less current if you spray the outside unit with the garden
> hose and then measure it with the ammeter.
>
> 5. Shading the outside unit (compressor and condenser) does not reduce
> electricity costs [Assume shade does not block air flow].
>
> 6. If you have high ceilings and ceiling fans, it is more energy efficient
> to leave the fans running at low speed all the time to pull down hot air
> and get it to circulate through the a/c system.
>
> 7. It isn't worthwhile to check on the amount of Freon (or whatever) that is
> in the system -- all that matters is measuring the temperature of the
> cold air coming out (say 62 F) and the outside temperature or maybe the
> attic temperature.
>
> --Jeff
This is Turtle.
You got too many Question here and I will answer just the first 2 .
Answer to 1 ) If you turn a hvac system off less than 8 hours. It will cost
you more money to recool the house from a very high temperature to the lower
temperature than just moving up to a higher temperature on the thermostat. If
your going to be gone more than 8 hours move the thermostat to about 85ºF or so
and turn it back down when you get back home. If your going to be gone for 24
hours or more like on vacation. move the thermostat to the highest setting of
about 95ºF and keep the house below 95ºF because refrigerator , Freezers, and
Wine Coolers are not designed to run in temperatures above 95ºF. Most or a lot
of Refrigerator & Freezers will stop working at 100ºF or above. If you read the
installation instruction when you bought the refrigerator or freezer it tells
you to not run the appliance in ambiant above 95ºF. Also do not run it in
Ambiants of below 40ºF.
Answer to 2) and 2B) .
2) Hog wash.
2B) You found the Hog wash answer was the answer.
TURTLE
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