I have a 900 sq ft home that I have no heat or air and I just bought two PTAC units that are 12000 btu's each and I wonder would they heat & cool my home?

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Nope its a big room for 24000btu. the computation is 18sqm./ 1 ton. or 1.5 hp.

Posted on Mar 19, 2008

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Posted on Jan 02, 2017

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12000 btu cools 550 sq ft

Jun 23, 2015 | Heating & Cooling

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.

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.

Aug 05, 2011 | Maytag M6Q10F2A Air Conditioner

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.

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.

Aug 05, 2011 | Danby DPAC12031 Air Conditioner

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.

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.

Jun 07, 2011 | Maytag M6X08F2D Air Conditioner

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.

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.

Jun 06, 2011 | Samsung AW0603B Air Conditioner

the 'rule of thumb' is 1 ton of AC for every 600 sq feet of a well insulated space (400 sq ft if not well insulated)- for example if the space to be cooled is 1200 sq ft - and is well insulated - you would require a 2 HP unit. 1200 divided by 600 = 2

if the space was not well insulated - you would require a 3 HP unit. 1200 divided by 400 = 3

note; 1 ton of air conditioning - is sometimes referred to as 1 HP or 12000 Btu. Whether you call it 1 HP or 1 Ton or 12000 Btu - they all three mean exactly the same thing.

take this example - 2 tons of air conditioning can also be referred to as 2 HP or 24000 Btu.

fyi - it doesn't matter what 'brand' - they all work off the same principle.

hope this helps

if the space was not well insulated - you would require a 3 HP unit. 1200 divided by 400 = 3

note; 1 ton of air conditioning - is sometimes referred to as 1 HP or 12000 Btu. Whether you call it 1 HP or 1 Ton or 12000 Btu - they all three mean exactly the same thing.

take this example - 2 tons of air conditioning can also be referred to as 2 HP or 24000 Btu.

fyi - it doesn't matter what 'brand' - they all work off the same principle.

hope this helps

Jun 25, 2010 | Carrier XHB123D X/Y Series Heat/Cool Air...

First off - the 'rule of thumb' is 600' per ton of Air Conditioning. In other words your old unit is a 2 ton unit. So - 2 tons x 600' = 1200'. As you can see if you install the 2.5 ton unit - you will be installing a AC that 'could' cool a 1500 sq ft house (2.5 x 600' =1500 sq ft.). Slightly more than what you need; and the 3.5 ton unit is 'way to big,' (3.5 x 600' = 2100 sq ft.).

Note: fyi - many in the AC business will sometimes refer to tonnage in btu's, i.e. 1 ton = 12000 btu - hence a '2 ton unit' can also be referred to as a 24000 btu unit and vice versa.

So... from the above - you can easily see that "2 tons" of Air conditioning is what is required to cool the 'average' home of 1100 sq ft. "roughly speaking."

Note: it is always best to have a professional 'size' your cooling/heating needs.

One of your questions was could you 'mix tonnage?'

The answer is 'usually you don't mix the tonnage of your outside/inside units.' However, professionals sometimes do (mix the tonnage) in certain situations, and installing a 2.5 ton outside unit with an existing 2 ton inside unit is often done, however, there are some 'tech issues' here and - I would "again" recommend that you call a Service Tech to help you with the sizing/mixing of your cooling/heating needs.

hope this has helped

Note: fyi - many in the AC business will sometimes refer to tonnage in btu's, i.e. 1 ton = 12000 btu - hence a '2 ton unit' can also be referred to as a 24000 btu unit and vice versa.

So... from the above - you can easily see that "2 tons" of Air conditioning is what is required to cool the 'average' home of 1100 sq ft. "roughly speaking."

Note: it is always best to have a professional 'size' your cooling/heating needs.

One of your questions was could you 'mix tonnage?'

The answer is 'usually you don't mix the tonnage of your outside/inside units.' However, professionals sometimes do (mix the tonnage) in certain situations, and installing a 2.5 ton outside unit with an existing 2 ton inside unit is often done, however, there are some 'tech issues' here and - I would "again" recommend that you call a Service Tech to help you with the sizing/mixing of your cooling/heating needs.

hope this has helped

Jun 20, 2010 | Carrier 38CKC036 Air Conditioner

there is most likly no problem with the machine itself. most likly its oversized. how many sq. ft. is the space. 700 sq. ft. per 12000 btu's is the norm. If its over sized the unit will cool the space quickly and not have the time to remove humidity like its supposed to. check your sq. ft. and on the unit you will see the BTU's of the unit and go from there. I hope this answers your question!!!

Sep 01, 2009 | Heating & Cooling

The unit is probably undersized for the space. Rule of thumb is 12000 btu per 500 sq ft. Take a thermometer and measure the entering air to the unit and then hold it in the outlet air stream you should see a temp. difference of about 10 to 15 degrees if it functioning properly. Hope this helps 2rns4u <*{{{>(

Jul 22, 2009 | Sunpentown WA-1210E Air Conditioner

tHATS DEPENDS ON YOUR PART OF THE COUNTRY YOU LIVE. DUE TO REQUIRED INSULATIONS VALUES!

Jun 09, 2008 | Weather King Heating & Cooling

Feb 02, 2016 | Amana PTH123B25AJ Heat Pump Air...

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