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Questions on Efficient & Proper Use of a Residential Central A/C No Way 07-27-2007
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Posted by No Way on July 27, 2007, 12:47 pm
I recently have installed a Lennox XC15 and was wondering whether I
should have the A/C constantly going even when nobody's home during
the day or have it not come on until shortly before we get home from
work?

I currently have the thermostat programmed so that the A/C will not
come on after we leave for work and have it come back on to start
cooling down the house shortly before we come back from work.

But what I noticed on my couple of days off from work is that during
the day when it's not programmed to come on at all and is hot out, my
house can reach as high as 30C/86F inside. Then when it came time to
cool down the house, the A/C was going for quite a while before it
brought the indoor temperature down to 24C/75F which is what we're
comfortable at.

So, what I was wondering was, which would be a more efficient and less
taxing use of the A/C?

1. Have the A/C not come on during the day at all after we leave for
work until we come home, no matter how hot it gets inside, thereby
having the A/C run for quite a while before the indoor temperature is
brought down to 24C/75F.

2. Do have the A/C keep the house cool, but just not at 24C/75F, which
is what we normally have the house at. But a little warmer while
nobody's home, say 26C/78.8F. And then have the A/C cool down the
house to our comfortable 24C/75F by the time we get home from work.

3. Have the A/C running all the time to keep the house at the 24C/75F
level whether nobody's home or not.

FYI, I believe my A/C has a SEER rating of 15 or so. How do you guys
have your A/C programmed? Thanks.

Posted by on July 27, 2007, 1:00 pm

>I recently have installed a Lennox XC15 and was wondering whether I
>should have the A/C constantly going even when nobody's home during
>the day or have it not come on until shortly before we get home from
>work?
>
>I currently have the thermostat programmed so that the A/C will not
>come on after we leave for work and have it come back on to start
>cooling down the house shortly before we come back from work.
>
>But what I noticed on my couple of days off from work is that during
>the day when it's not programmed to come on at all and is hot out, my
>house can reach as high as 30C/86F inside. Then when it came time to
>cool down the house, the A/C was going for quite a while before it
>brought the indoor temperature down to 24C/75F which is what we're
>comfortable at.
>
>So, what I was wondering was, which would be a more efficient and less
>taxing use of the A/C?
>
>1. Have the A/C not come on during the day at all after we leave for
>work until we come home, no matter how hot it gets inside, thereby
>having the A/C run for quite a while before the indoor temperature is
>brought down to 24C/75F.
>
>2. Do have the A/C keep the house cool, but just not at 24C/75F, which
>is what we normally have the house at. But a little warmer while
>nobody's home, say 26C/78.8F. And then have the A/C cool down the
>house to our comfortable 24C/75F by the time we get home from work.

        Yep.

>
>3. Have the A/C running all the time to keep the house at the 24C/75F
>level whether nobody's home or not.
>
>FYI, I believe my A/C has a SEER rating of 15 or so. How do you guys
>have your A/C programmed? Thanks.

--
Click here every day to feed an animal that needs you today !!!
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Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo now available online http://pmilligan.net/palm/

Posted by on July 27, 2007, 1:02 pm

> I recently have installed a Lennox XC15 and was wondering whether I
> should have the A/C constantly going even when nobody's home during
> the day or have it not come on until shortly before we get home from
> work?
>
> I currently have the thermostat programmed so that the A/C will not
> come on after we leave for work and have it come back on to start
> cooling down the house shortly before we come back from work.
>
> But what I noticed on my couple of days off from work is that during
> the day when it's not programmed to come on at all and is hot out, my
> house can reach as high as 30C/86F inside. Then when it came time to
> cool down the house, the A/C was going for quite a while before it
> brought the indoor temperature down to 24C/75F which is what we're
> comfortable at.
>
> So, what I was wondering was, which would be a more efficient and less
> taxing use of the A/C?
>
> 1. Have the A/C not come on during the day at all after we leave for
> work until we come home, no matter how hot it gets inside, thereby
> having the A/C run for quite a while before the indoor temperature is
> brought down to 24C/75F.
>
> 2. Do have the A/C keep the house cool, but just not at 24C/75F, which
> is what we normally have the house at. But a little warmer while
> nobody's home, say 26C/78.8F. And then have the A/C cool down the
> house to our comfortable 24C/75F by the time we get home from work.
>
> 3. Have the A/C running all the time to keep the house at the 24C/75F
> level whether nobody's home or not.
>
> FYI, I believe my A/C has a SEER rating of 15 or so. How do you guys
> have your A/C programmed? Thanks.



#1 if your unit is grossly oversized

#2 if your unit is properly sized

#3 if your unit is undersized




Posted by on July 27, 2007, 1:22 pm

>
>#1 if your unit is grossly oversized
>
>#2 if your unit is properly sized
>
>#3 if your unit is undersized

        Let's not get personal here .....


--
Click here every day to feed an animal that needs you today !!!
http://www.theanimalrescuesite.com/

Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo now available online http://pmilligan.net/palm/

Posted by Tony on July 27, 2007, 3:19 pm

>
>> I recently have installed a Lennox XC15 and was wondering whether I
>> should have the A/C constantly going even when nobody's home during
>> the day or have it not come on until shortly before we get home from
>> work?
>>
>> I currently have the thermostat programmed so that the A/C will not
>> come on after we leave for work and have it come back on to start
>> cooling down the house shortly before we come back from work.
>>
>> But what I noticed on my couple of days off from work is that during
>> the day when it's not programmed to come on at all and is hot out, my
>> house can reach as high as 30C/86F inside. Then when it came time to
>> cool down the house, the A/C was going for quite a while before it
>> brought the indoor temperature down to 24C/75F which is what we're
>> comfortable at.
>>
>> So, what I was wondering was, which would be a more efficient and less
>> taxing use of the A/C?
>>
>> 1. Have the A/C not come on during the day at all after we leave for
>> work until we come home, no matter how hot it gets inside, thereby
>> having the A/C run for quite a while before the indoor temperature is
>> brought down to 24C/75F.
>>
>> 2. Do have the A/C keep the house cool, but just not at 24C/75F, which
>> is what we normally have the house at. But a little warmer while
>> nobody's home, say 26C/78.8F. And then have the A/C cool down the
>> house to our comfortable 24C/75F by the time we get home from work.
>>
>> 3. Have the A/C running all the time to keep the house at the 24C/75F
>> level whether nobody's home or not.
>>
>> FYI, I believe my A/C has a SEER rating of 15 or so. How do you guys
>> have your A/C programmed? Thanks.
>
>
>
> #1 if your unit is grossly oversized
>
> #2 if your unit is properly sized
>
> #3 if your unit is undersized
>

What in hell got anything to do with his question
oversize, undersize, properly size.
he is looking for comfort and not if system is properly matched.
you call yourself pro.???????



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