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I must buy a new ac unit...am considering model HR42C1VAR....Haier 3.5 ton....house is 1600 sq ft...is this a good model....

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Yes if you have good insulation. It is just right. May I suggest a varriable speed air handler inside. Very quiet and a lot of your effeciency comes from the Air handler. Lower cost to operate.quiet,very good humidity control. cost about 400 dollars more but well worth it. Rus

Posted on Jul 13, 2009

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1 Answer

1800 sq ft house how many onne ac do i need


The rule of thumb is 600 sq ft per ton so you should be good with a 3.0 Ton unit.

Jul 19, 2011 | Heating & Cooling

1 Answer

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.

Jun 07, 2011 | Maytag M6X08F2D Air Conditioner

1 Answer

I HAVE A NEW AC 2.5 TON GOODMAN, MY HOUSE IS 1600 SF I HAVE 3 BEDROOMS AND TWO ARE CLOLED AND THE VENTS ARE CLOSED TOO, WITH EVERY THING OPEN THE HOUSE WILL ONLY GET TO ABOUT 80-81 % NEW HOUSE WITH LOTS...


Depending on everything working correctly with the system, the problem I see may be the size of the system. 2.5 tons is enough to condition around 1000 sq. ft. At 1600 sq. ft. Of living space, you will need a 3.5 to 4 ton system. Unless it was designed in a way that 2.5 tons would work which i doubt, there would be a problem with the charge of refrigerant or other under lying problems. First I would make sure your system is designed right for your house, check all filters and air flow from the vents. Then you go from there. Q good way to check the charge without equipment to do it, on a warm to hot day the outside copper lines should be sweating and warm to hot air coming from the fan on top of the condenser. It's not the accurate way to do it, but a good check anyways. Hope this helps and good luck!

May 25, 2011 | Goodman CLJ42AR49 Air Conditioner

1 Answer

Does not seem to be sufficient cool for a 1600 sq ft manufactured home coming from the Coleman unit installed. Some vents more air, others less air. Unit runs without stopping ever. Can you give us some...


Hi John, depending on the size, I would need the model number from the outdoor unit if it is a split system, you should have 400 cfm per ton of cooling. If you have a 1600 SQ' home, and a 3 ton unit, 3 x 400 cfm is 1200. It would be to small. There are 12,000 B. T. U.'s of cooling per ton. 2 tons would be 24,000 b t u's. 3 tons would be 36, 000 b.t.u.'s. Also, most contractors put lever dampers in the duct work that can be adjusted. They will put a red flag where the lever is and we can adjust the flow to balance out the house. I don't know where your ducts are, under or above, but with a good light find the crawl space and check it out. Get the model number and call it in to get the tonnage or send it to me and I will tell you. It will have a 024, 030, 036, 042, or, 060 in the number, MODEL number and figure like I told you above, 12,000 per ton. 060 would be a 5 ton. This will let you know if the unit is the right size or not. Please rate me on this and I know you will be kind. Thank you John.
Sincerely,
Shastalaker7
A/C, Heating, & Refrigeration Contractor
PS CFM is cubic feet per Minute.

Aug 05, 2010 | Coleman Heating & Cooling

2 Answers

I have a Goodman GSC130361DE it is too small for a 2100sq ft home


Well you have a 3 ton system, it might be a tick small depending on windows and insulation in the house. Make sure you set it at one temp and leave it. Zoneing would also help.

Jul 17, 2010 | Goodman CLQ30AR32 Air Conditioner

1 Answer

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

Jun 20, 2010 | Carrier 38CKC036 Air Conditioner

2 Answers

We have an older model Lennox ac model #HS26-461-P and we are trying to find out what the tonnage is. Can you tell me where to look or if you know what it is will you please tell me?


The answer that (TheMobilian) left couldn't be further from the truth, of offense. So you're saying if you have a 1000 sq ft house with 4 bedrooms you'd have 4.5 tons of cooling? That's insane, the compressor in that system would be shot in about 6 months from short cycling. Their are many factors in sizing equipment, but none of them involve how many bedrooms you have. If you don't know how to calculate load from windows and insulation factor, then you can use the old (1 ton per 500-550 sq ft) that will get you close.

Jun 18, 2010 | Heating & Cooling

1 Answer

AC not cooling


first off you should have a four ton unit. what is your super heat? is it pulling attic or outside air?

May 27, 2010 | Goodman CLQ36AR49 Air Conditioner

1 Answer

I have an '06 model combination cooling and heatin


For every 500 sq. ft. house or a 1-bedroom size new house you need 1-ton of cool . An old house you need a ton worth of cooling for every 400 sq. ft. house or a 1-ton per 1 bedroom size house.

Dec 22, 2009 | Whirlpool Heating & Cooling

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