Physical Size Of Central AC Unit - HVAC - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 06-19-2010, 11:16 PM   #1
Join Date: Jun 2010
Posts: 1
Rewards Points: 10

Physical size of Central AC unit

I just had a 2.5 ton Trane XL15iAC unit installed (my house is about 1,400 square feet) and it is enormous. If it is so efficient why is it so big? I t seems to me that a unit that big would use more electricity. I keep reading about being careful not to oversize the AC. Does this not apply to the actual size of the unit?


Marjorie is offline   Reply With Quote
Old 06-19-2010, 11:20 PM   #2
Wire Chewer
Red Squirrel's Avatar
Join Date: Jun 2009
Location: Ontario, Canada
Posts: 3,352
Rewards Points: 132

I don't know much about ACs, but maybe it's efficient because the coils themselves are bigger, making the unit itself bigger. I would imagine if the condenser coil covers a larger surface area, it will cool off better, making the compressor work less hard. I might be full of it though, I'm no expert, just speculating.


Red Squirrel is offline   Reply With Quote
Old 06-20-2010, 06:43 AM   #3
An old Tradesmen
Join Date: Oct 2008
Location: Somewhere
Posts: 34,413
Rewards Points: 7,816

It is as Red said.

The larger coil surface area. Aids in rejecting heat better. So a smaller horse power fan is used. Which draws less wattage.
A lower head pressure means a lower compression ratio, so the compressor draws less wattage.
beenthere 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
Ruud Pack unit "KABOOMS" upon First Light Up of the Day! Wirenut2tite HVAC 18 12-15-2012 10:11 AM
Venting Water Heater near Central Air Unit rchrivera Plumbing 5 03-16-2010 11:03 PM
Central Air Unit is freezing up, all fans working rebuildergirl HVAC 3 06-08-2009 08:42 PM
Central Air unit Temp IntimidatorJD3 HVAC 5 05-11-2009 11:27 AM
Home Central Air Unit has No Freon Recharge Valve nofrey HVAC 1 04-28-2009 07:40 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1