Running A/C With all the windows open - Canadian TV, Computing and Home Theatre Forums
  • 1 Post By Phils
LinkBack Thread Tools Search this Thread Display Modes

post #1 of 8 (permalink) Old 2018-07-12, 10:15 AM Thread Starter
Join Date: Mar 2006
Posts: 4,592
Running A/C With all the windows open

So I got my new Central A/C a year ago, one thing I was told when I had it installed is to make sure all the windows and doors are closed when its running, because the house air is a closed system compared to the air outside the house. I have been following this law religiously, but I have noticed, my next door neighbor also has a fairly new Central Air Conditioner, but his is constantly running 24/7 all the time. He runs his even with all the windows in his house wide open. Umm I was taught this was bad, but why do some people do it? is it really necessary to close all windows when running the A/C? If so maybe my neighbor did not get the same info I got?
17671 is offline  
Sponsored Links
post #2 of 8 (permalink) Old 2018-07-12, 10:49 AM
Join Date: Jan 2006
Location: Montreal
Posts: 145
It's a good idea to close the windows if you'd rather not pay for cooling the great outdoors.
DSgamby likes this.

Phils is offline  
post #3 of 8 (permalink) Old 2018-07-12, 10:58 AM
Join Date: Apr 2012
Location: Nova Scotia
Posts: 778
We have had a heat pump for about 18 years and always turn off the system when the windows are open. But, some people just set their thermostats at a certain temperature year round and never touch it, even when the windows may be open to let in some fresh air. Like Phils said, it will cost you more.
NovaMan is online now  
post #4 of 8 (permalink) Old 2018-07-12, 11:18 AM
Join Date: Feb 2010
Location: Kingston, ON - Bell ES 9241, Onkyo TX808, Oppo93, AppleTV3, Vizio 55", PSB & Yamaha speakers for 7:1
Posts: 209
Knowing only what the writer has said, these people are idiots. They are wasting money and it's also bad for the environment!
ExRobotGuy is offline  
post #5 of 8 (permalink) Old 2018-07-12, 11:29 AM Thread Starter
Join Date: Mar 2006
Posts: 4,592
Cool good to know, I have been teaching my wife the importance of setting the thermostat before you leave the house for long periods of time so you do not want to have the air conditioner running non stop on an empty house, and also teaching her that when you open the windows, you need to turn off the system via the thermostat so its not working extra hard unnecessary. Glad to know I am doing the right thing and my neighbor is an idiot, I already knew he was not so bright
17671 is offline  
post #6 of 8 (permalink) Old 2018-07-12, 12:18 PM
Join Date: Dec 2008
Location: Bruce County, ON
Posts: 1,251
My neighbor leaves his back door open all summer to let his dogs run free, with the Central AC running right beside it 24/7.

Always wonder how much extra he pays each summer. Does the same thing in the winter as well when I assume his furnace is running.
Inglewood is offline  
post #7 of 8 (permalink) Old 2018-07-12, 01:14 PM
Join Date: Jun 2011
Location: 43° N, 81.2° W
Posts: 8,268
Temperature is only part of the issue. Humidity can be more important than temperature, even when it is cool outside. It takes far more energy to condense water, something an A/C unit also does, than it does to cool air or even cool water. Keeping the windows closed keeps the humidity level at a point where the A/C is working continually to remove humidity (AKA water vapour) from the air.

The other thing that gets to me is people who use the oven in very hot weather. It's too hot to go out so they stay inside and bake. What's wrong with this picture?!
ExDilbert is online now  
post #8 of 8 (permalink) Old 2018-07-12, 02:58 PM
Join Date: Sep 2012
Posts: 227
+1 on the humidity, my kids complain because the Nest is set to be warmer in the summer/cooler in the winter during the day and I work at home. I would never try and heat my house with all the windows open
pinto is offline  

Quick Reply

Register Now

In order to be able to post messages on the Canadian TV, Computing and Home Theatre Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome