Kenmore/Coldspot Model #1068742190, Serial #Y51769296, built 3/23/78. 21,000BTU cooling only, 230/208. This home is a three level, 3,000 sq ft on a lake. All windows/glass doors face lake. Each level has a wall AC only unit, BUT this unit serves the loft and downstairs living areas. Need best bang for buck,but also same or better cooling
Most air conditioners now are reverse cycle, which means that they can heat as well as cool. Cooling only units were popular many years ago due to the price difference for a reverse cycle. Today, the cost of manufacturing has dropped and it has resulted in cooling only units being virtually finished. I would suggest you get a local air con sales company to come to your house to measure up properly and determine what would be best. There are a lot of factors in installing air conditioning. IE/ The size of the house, the area it will be required to heat / cool, the amount of windows, types of walls, roof etc (Heat loading on the house) Roof and wall insulation etc etc.
SOURCE: Will PTAC solve my problem?
Nope its a big room for 24000btu. the computation is 18sqm./ 1 ton. or 1.5 hp.
SOURCE: btu or sq feet of home
tHATS DEPENDS ON YOUR PART OF THE COUNTRY YOU LIVE. DUE TO REQUIRED INSULATIONS VALUES!
SOURCE: 4 ton HVAC Unit for 2000 SQ FT Residential Bldg (Single Story)
One ton of cooling per 500 square feet of space assuming you have good insulation. Yes, 4 tons for 2000 feet would be accurate.
SOURCE: Can I mix brands/tons when installing AC unit to existing coils?
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
SOURCE: My landlord installed this brand
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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