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Samsung 8000 btu window air conditioner

I just bought this unit, yesterday, from Lowe's and installed it in our 225 sq. ft. bedroom. I put a thermometer in front of the grill and it blowing air at about 50 Fdegrees. I set the conditioner at 64 degrees. it's lowest setting, but the room was actually 68 degrees when I awoke in the morning. I then checked the temp. of the air coming out of the conditioner and it was at 60 degrees, ten degrees warmer than the preceeding night. The outside air temp. was approximately 70 degrees, and the humidity was very high. I am ready to take the unit back, but thought I would see if there is an explanation as to why the output air temp was 50 degrees upon start up, but ten hours later could only get as low as 60 degrees. Is this normal, if so, I perhaps I need to get a 10000btu, or a different brand of 8000 btu??

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  • woodgood Jun 19, 2008

    Thank you so much for your reply, which was very clear and concise. I understood perfectly and now can appreciate why airconditioners in motels sometimes do not cool as much as I like. Often, especially the upper floors in high rise motels, the temperature of the room is quite warm, yet the outside temp. can be rather low in the spring and late fall. I sleep best when the temp. is around 64 degrees, and often can not achieve this temp. with the motel air conditioners. Now, I understand why I can't.

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Air conditioners rely on a difference in pressure between the "high side" and "low side" in order to perform. Of course, a/c's are designed to work in the heat. Having a cooler outdoor temp of 70 degrees probably is not sufficient to maintain adequate head pressure and will result in reduced cooling capacity. Also, since it was 68 in the morning in the room, it is possible that the indoor coil began to freeze up. Basically, you have a cold coil that you keep warm by moving air over it. If the air doesn't have enough specific heat (what your thermometer measures) it can allow the coil to get colder than 32 degrees and the condensate from all of your humidity will begin to freeze on the coil. My recommendation would be to check the a/c on a day that is 80+ degrees. If you have an avarage indoor temp of 70 degrees you should be able to look for the air coming out to be approximately 20-25 degrees colder than the air being sucked in.

Posted on Jun 12, 2008

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I have a Maytag window unit and i am trying to find out how many btu is has. right now it is in a small room and i want to know if it will work in a bigger size room. MODEL M6Q1OF2A SERIAL CR 264327...


that is a 10000 btu unit and a good rule of thumb to go by when 'sizing' a unit is 12000 btu for every 600 sq ft of cooling space (if the place is well insulated) or 400 sq ft (if not well insulated).
So, you have a 10000 btu unit which is 5/6th of 12000 btu - so - can reasonably expect that unit to cool approximately 500 sq feet.
In other words the room it's in now could be only - say - 300 sq feet (and well insulated) - in which case the AC unit is cooling it - well.
However, if you try to cool a 800 sq ft room - it will not work as well.
Hope this has helped.

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Not cooling room


Assuming the unit is 'cooling' but not cooling it 'well,' I would think the unit is too small.
NOTE: 2000 Btu for every 100 sq ft of cooling space if the room is well insulated. If not - then 2000 btu for every 66 sq ft.
For example - a 12000 btu AC unit should cool 600 sq feet of cooling space if well insulated.
or
400 sq feet if not well insulated.
hope this has helped.

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It is 106 degrees outside, I have a a/c unit which is cooling at 75 degrees in a 1180 square foot townhouse apartment, this seems like the unit is doing all it can with the excessive heat, is it


Unfortunately, 7000 Btu's will not cool 1180 sq ft. At best, it's rated for 400 sq ft, as it's only rated as a "Room Air Conditioner". To cool 1180 square feet, you'll need at least 30,000 Btu's (like in Central Air Conditioning) or 4 more window units spread out throughout the condo. It takes more Btu's to cool, than it does to heat.

I really sorry. I wish I had better news for you. Thanks for choosing FixYa.

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My landlord installed this brand new out of the box. Our apt is 900 sq ft tops. This unit can't even cool down our living room and kitchen. If the whole 2 bedroom apt is 900 sq ft, you can imagine how...


The AC your landlord installed is rated at 8000 btu which is way too small for 900 sq ft. You need at least a 15000 Btu Air conditioner and a 'well insulated' house to be cool.
A good rule of thumb in the AC business says you need 1 ton (12000 btu) of Air conditioning for every 600 sq feet (if the house is well insulated) - if not - then you will need 1 ton (12000 btu) for every 400 sq feet.
So, if you have 900 sq feet and the house is well insulated you should have at least a 15000 btu unit.
If it's not well insulated you will need 24,000 btu.

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1 Answer

The unit is not cooling the room. It is only comforting when you are in direct line of it.


you need to find out the size of the unit.
Rule of thumb - for every 600 sq ft of cooling area (in a well insulated house) you will need 1 ton of air conditioning. 1 ton = 12000 btu.
So, if your cooling area is 600 sq ft you would need an AC which was rated at 12000 btu, assuming your house is well insulated.
If it is not insulated well - you might need a bigger unit, i.e. 15000 btu.

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Hitachi Madris ac console


Hitachi is a good brand, I wouldn't be afraid of it.

As to the size, it seems a little 'oversized' for the room you're talking about.

24x12 = 288 sq ft. As a general rule you need 12000 btu for every 600 sq ft.

I'm thinking between 6000 -10000 btu ought to be big enough.

Lots of things go into sizing, and the size of the room is important - but the 'heat load,' needs to be considered too. For example - will there be a lot of people in this room, or is there a lot of windows, is there electrical equipment in this room that will be putting off heat, and how well is it insulated? So you need to consider all of these things when deciding what size unit to buy.

For example - if this room is a bedroom and used primarily for sleeping - I wouldn't be afraid to put a 6000 btu unit in it - but if it was going to be used as a place with tv's, computers and other electrical equipment I might want to put a 10000 btu (or larger) in it.

Good Luck!



Generally speaking, it sounds like 18000 btu is too much AC here, and there's no reason to spend more money than you need to and you can 'oversize' just as easy as you can 'undersize' when it comes to Air Condtioning.



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