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Rando
USA Fan
When IPs were Visible
Member since Apr 2015
12231 posts

A quick question about window units...
Small building, under 800 sqft.

We wanna keep it at 70 degrees or cooler 24/7.

Specwise, a 15000 btu unit will do it.

A 25000 heavy duty 230v pulls 4x as much moisture out of the air.

What does the OB say?

115V 15100 unit is 400ish.
230V 25000 unit is 600.


bayoubrucebruce
LSU Fan
Member since Jun 2008
146 posts

re: A quick question about window units...
How well insulated is the building? Around 800 square ft is a little over 1 1/2 ton of air. 12000 btu= 1 ton. 750 Sq ft would be 1 1/2 ton= 18000 btu cooling. That being said I would go with the bigger unit.


DownshiftAndFloorIt
LSU Fan
Here
Member since Jan 2011
50680 posts

re: A quick question about window units...
On the OB, the answer is always about 6x bigger than you really need or 2x what you can afford, whichever is greater.


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Motorboat
LSU Fan
At the camp
Member since Oct 2007
18104 posts

re: A quick question about window units...
always go bigger


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Rando
USA Fan
When IPs were Visible
Member since Apr 2015
12231 posts

re: A quick question about window units...
Building is well insulated, but a few drafty spots to fill.

Any harm in it being able to cool from 90 to 70 so quickly? That's my main worry. Moisture.



bayoubrucebruce
LSU Fan
Member since Jun 2008
146 posts

re: A quick question about window units...
Is it just a wide open building? 15k btu, I belive isn't going to get the job done. 25k will and shouldn't have any problems with moisture because it's not sized extremely too big. It all just depends on how well building is sealed and insulated to how well it will cool and remover moisture.


Rando
USA Fan
When IPs were Visible
Member since Apr 2015
12231 posts

re: A quick question about window units...
13X17 kitchen/living room area
15X3 hallway
6X10 bathroom
13X15 bedroom

Microhouse.

Closer to 500 sq ft living.

Closet/server area isn't an area of concern as it is seperately cooled and dehumidified.


bayoubrucebruce
LSU Fan
Member since Jun 2008
146 posts

re: A quick question about window units...
If your wanting to cool several rooms,you need to look into a split system. A window unit will cool that area but not be able to be consistent temp and moisture removal throughout. Or a small window unit in each room.


Tbooux
LSU Fan
Member since Oct 2011
1464 posts

re: A quick question about window units...
quote:

small window unit in each room


Prob your best option.


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Hammertime
UNO Fan
Will trade dowsing rod for titties
Member since Jan 2012
40183 posts

re: A quick question about window units...
What about one of those Mitsubishi ones that mounts on the wall? Can't those support a couple of vents (in addition to the big one), and they only cost like $1500


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Rando
USA Fan
When IPs were Visible
Member since Apr 2015
12231 posts

re: A quick question about window units...
Okay, so an 8000 for the bedroom area, what size for the rest? 15000, 18000, 25000?



bayoubrucebruce
LSU Fan
Member since Jun 2008
146 posts

re: A quick question about window units...
If you could find a mini split system (ex. Mitsubishi) , and with enough circuits to do wall mounts in living/kitchen, and bed and bath for $1500 is really cheap. The good mini splits I have done in the past are several thousand installed with just outside unit and one wall unit.
For window units you could put an 8k in bed room and prolly 12 in kitchen living room area because there probably isn't a spot to put one in bathbroom.


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Rando
USA Fan
When IPs were Visible
Member since Apr 2015
12231 posts

re: A quick question about window units...
Ended up going with two frigidaire 10k btu units.

Found a proce I couldn't pass up on amazon. Two to my door for under 530.


damnedoldtigah
LSU Fan
Middle of Louisiana
Member since Jan 2014
3859 posts

re: A quick question about window units...
Check out the below and order one of those mothers. Reasonably priced and damned reliable. Have three of them in an old house. Stay at 73' year round. Not bad on the electric bill either.


LINK


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Chad504boy
Longwood Fan
Member since Feb 2005
125399 posts

re: A quick question about window units...
quote:


Specwise, a 15000 btu unit will do it.

A 25000 heavy duty 230v pulls 4x as much moisture out of the air.



explain this to me, i was always told with central units that if you go too big, it doesn't run long enough to condition the air enough. Cooling too quickly is a problem too.


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Chad504boy
Longwood Fan
Member since Feb 2005
125399 posts

re: A quick question about window units...
check jet.com and see if its available there.


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Chad504boy
Longwood Fan
Member since Feb 2005
125399 posts

re: A quick question about window units...
quote:

Two to my door for under 530.


possibly $484 jet.com


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