What size window a/c unit should I buy?

Reply

  #1  
Old 06-11-14, 12:40 PM
G
Member
Thread Starter
Join Date: Mar 2007
Location: USA
Posts: 153
Received 0 Votes on 0 Posts
What size window a/c unit should I buy?

I have a 2 story house that I'm looking for advice on.
Top floor is 3 bedrooms, each has a 5,000 or 6,000 BTU window unit that works great at keeping the temperatures around 70F at night with the doors closed.

The bottom floor has 3 rooms with no doors between them. Total square footage is ~700:
Living room (approximately 12.5' x 19.5')
Dining Room (approximately 12.5' x 12.5')
Kitchen (approximately 17' x 10')

..and stairs that go up to the second floor. There is no door on the stairs

I'd like advice on a window unit to help cut some of the heat on the first floor.

Goals:
Keep temperature at 75F or lower in living room. Reduce humidity. Low energy use/low amps.

I don't need an even disribution of cold air throughout the house. The most important thing is keeping the living room manageable.

What should I do?
Should I go for a 8,000 BTU unit that's rated for 350 ft2 (more than enough for the living room) or will this just end up making no difference as the cold air won't stick in the living room?

Should I go for a bit larger 10,000 BTU unit that can approach a 450 ft2 room?

Or am I going to have to buy something huge, one of the 14,000 BTU units that actually rated up to 700 ft2?

Thanks!
 
Sponsored Links
  #2  
Old 06-11-14, 12:52 PM
T
Member
Join Date: Jun 2012
Posts: 988
Received 13 Votes on 11 Posts
  #3  
Old 06-11-14, 01:11 PM
G
Member
Thread Starter
Join Date: Mar 2007
Location: USA
Posts: 153
Received 0 Votes on 0 Posts
....yes, I've seen that. Maybe you didn't read the post?
I'm not looking for optimal cooling or even distribution of cold air.
I'd like to cool a ~250 sq ft room that is part of a ~700 sq ft floor with no doors to prevent airflow and stairs leading upstairs.

Will I need a unit rated for 250 sq ft or one for 700 sq ft?
If I'm just looking to keep the house at ~75F will the smaller unit be ok?
 
  #4  
Old 06-11-14, 01:28 PM
G
Member
Thread Starter
Join Date: Mar 2007
Location: USA
Posts: 153
Received 0 Votes on 0 Posts
Also, should I consider a minisplit instead?
How much would something like that run to install professionally
 
  #5  
Old 06-12-14, 05:57 AM
HVAC RETIRED's Avatar
Member
Join Date: May 2008
Location: Wisconsin USA
Posts: 715
Received 0 Votes on 0 Posts
Mini-splits are pricy.

A 5,000-Btu/hr window unit will cool that room.

You could use a small fan to circulate the air around that room.

With a 6,000-Btu/hr half ton window unit if you use a Wind Machine larger floor type fan the air might be able to be circulated through all the rooms cooling them to around 75F.
 
  #6  
Old 06-12-14, 06:51 AM
G
Member
Thread Starter
Join Date: Mar 2007
Location: USA
Posts: 153
Received 0 Votes on 0 Posts
Thank you so much, that is very helpful!
 
Reply
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


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: