New A/C Or Better Insulation? - HVAC - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC


Thread Tools Display Modes
Old 12-01-2008, 10:53 PM   #1
Join Date: Aug 2008
Posts: 29
Rewards Points: 25

New A/C or better insulation?

I have a two story 1300 sq ft duplex. The 2.5 ton central A/C has a heat pump and eats about 3 kwH of electricity when it is heating.

It takes 1 hr 7 min for it to heat the air temperature 2 degrees F and 39 min for the temperature to drop 2 degrees.
Does this sound normal?

The temperature outside is in the low 30s and inside the thermostat is set to 71 F.

Do you think I need a more powerful A/C or should I improve the insulation? I feel slight cold air coming in on the sides of the two exterior doors (front and back). I will try to add more door seal material along the sides but they may only make a small difference. The doors themselves are cheaply made (thin hollow type). I'm thinking I could invest in a thicker door or double door. The windows are okay; double pane but installed in 1983 so not the best quality.

Or is my heating simply not powerful enough.


grgryl is offline   Reply With Quote
Old 12-01-2008, 11:51 PM   #2
An old Tradesmen
Join Date: Oct 2008
Location: Somewhere
Posts: 34,406
Rewards Points: 7,802

Seal the doors, that will make a big difference.
May want to recheck around your windows for air leaks, if you find any, caulk them.

When is the last time your heat pump was cleaned and serviced.
Might need a good cleaning.


beenthere is online now   Reply With Quote
Old 12-02-2008, 12:10 PM   #3
Join Date: Jul 2008
Location: Vienna, VA
Posts: 318
Rewards Points: 276

The attic is always a big leak. Seal penetrations from wires, pipes, and the hatch. To keep the top floor cool in the summer, put in a radiant heat barrier. Finally, blow in a thick layer of insulation above your existing insulation.
sweaty is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cape Cod Style House Attic/Crawl Space Insulation Help Danielg Insulation 24 05-21-2012 08:20 AM
Old home insulation woes nowwhatnapster Building & Construction 15 11-02-2008 11:59 PM
Insulation over Attic Walkway BigJimmy Building & Construction 4 06-23-2008 02:13 AM
attic insulation question dderolph Building & Construction 10 11-03-2007 05:21 PM
Installing new insulation in my basement and removing the old moldy insulation. Fixitgeorge Remodeling 3 10-17-2006 08:33 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1