The sizing chart below is useful to help you determine your approximate central air conditioner size requirements. If you still need help, don't worry! Chat with or call one of our factory trained advisors to help get you the answers you need. As an alternative to the sizing chart below we offer MANUAL J - a professional load calculation based on your floor plan, location, and all variables. Please follow the link below for pricing. The turnaround for this service is 1-2 days. MANUAL J Residential Load Calculation Air Conditioning Square Footage Range by Climate Zone In order to scientifically calculate the right central air conditioner size, you can perform a Residential Load Calculation. Another way to size air conditioners is to determine the system size that is currently in place. The manufacturers do not list the air conditioner size on the unit. The system capacity will be coded into the model number of the outdoor unit. For example, model CKL24-1 is a 2 ton unit.

There are 12,000 Btu's per ton. The number 24 in the model number indicates the unit is 24,000 Btu's, divided by 12,000 Btu's per ton, equals 2 tons. 24,000 Btu's/12,000 Btu's per ton = 2 tons Use the following conversion information to determine your existing system size (use the system model number NOT the serial number) 18 = 1.5 tons 24 = 2 tons 30 = 2.5 tons 36 = 3 tons 42 = 3.5 tons 48 = 4 tons 60 = 5 tons When sizing air conditioners, be careful not to make the mistake of getting one that is too large. If the system you install is too large for the space, it will short cycle. In other words, the compressor will not run long enough to dehumidify the space and will limit your comfort. In addition, it will cycle on and off more frequently, increasing operating costs and reducing the system life. Proper air conditioner sizing is critical to optimize performance. If you're still unsure which system size is right for you, or if you're having difficulty downloading the Air Conditioner Size Calculator , please e-mail us or call us toll free number at 1-855-634-5588.

Sizing air conditioners by phone is difficult but we can provide you with the tools to get you started. Heating Square Footage Range by Climate Zone Use the lower of the two numbers if your home is well insulated and the higher number if it is older or poorly insulated. (Hint: Use the larger of the two numbers above if you're unsure of your home's insulation) Simply multiply the appropriate factor above by your home's total heated square footage to arrive at your approximate required heating capacity. For example, if you live in the yellow zone, your home is well insulated, and you have 2000 heated square feet, the equation will look like this: X .40 heating factor (from the chart above) 80,000 Btu actual output Then, to calculate the output on a gas furnace, multiply its efficiency rating by its listed input rating for the actual Btu output of heat. For example, if a furnace has a listed input rating of 100,000 Btu's and an efficiency rating of 80%, it will produce

If the same 100,000 Btu furnace has an efficiency rating of 93% it will produce:Mo Knows T Shirt 93,000 Btu actual outputCustom Bath Liners Reviews For this example, using an 80% efficient furnace, the 2000 square foot home above would require a 100,000 Btu input furnace which will produce the necessary 80,000 Btu's output of heat.American Standard Bathroom Faucet Vintage If you're still unsure which system size is right for you, please e-mail us or call our toll free number at 1-855-634-5588. An experienced design technician will be happy to assist you. Variables such as your insulation, type and number of windows, number of stories, construction type, etc. will greatly affect the required Btu's per square for both heating and cooling.

A general rule of thumb is that if your home is well insulated with newer style windows, you can select the smaller size system that falls within your total square footage. If your home is two story it will place less of a load on the system in the downstairs area as the second floor acts as additional insulation. If your home is not well insulated, has older style windows, and/or a larger than average number of windows, you will want to select the larger system which falls within your square footage range. The less insulated and more windows within the environment, the more likely you will experience greater air and heat loss. Contact Us for More Info If you're still unsure which system size is right for you, or if you're having difficulty downloading the Air Conditioner Size Calculator, please e-mail us or call our toll free number at 1-855-634-5588. An experienced design technician will be happy to assist you. 3 ton unit - 2200sq ft home Re: 3 ton unit - 2200sq ft home

B.A. King Home Inspections, LLC Serving Charlotte NC area and Rock Hill SC areas. CMI Certified Master Inspector and Independent License NC2449 and SC1597 "Discovery consists in seeing what everyone else has seen and thinking what no one else has thought." - Albert Szent-Gyvrgyi, Nobel Prize for Medicine 1937 I have 3.5 ton, water source hp, on 2950 ft., works great. I will probaly add zoneing to it next year along with a masterbath upgrade. There are a lot of factors that get consideration when sizing a unit. I looked at a retail space once that needed 5 ton of AC just for the lights. R-30 cellulose in attic. I just don't want to get a call down the road from the homeowner telling me that his a/c unit is constantly running to maintain the temperature. It would have been nice for the builder to zone the a/c but it's one thermostat (upstairs location) for the entire home. Like i said, it seemed to do fine in the short term. General rule of thumb is 1 ton to 500-600 sq.ft.

Would you recommend an hvac guy to evaluate or leave it be? This is the first time I've come across a 1 ton per 750 sq.ft of home so I just wanna be sure before I give the report. I mean, it's not the end of the world to recommend the builder get an hvac guy to look at it and let him make the call. General rule of thumb is 1 ton to 500-600 sq.ft. If the unit was working properly at the time of the inspection, that is what I would report. The inspector is not required to: A. Determine the uniformity, temperature, flow, balance, distribution, size, capacity, BTU, or supply adequacy of the cooling system. Many things determine whether the system is sized properly for the home. My house has a 3 ton unit for 1800 sq. ft. In VA, my house had a 3 ton unit for 2800 sq. ft. Don't interfere with anything in the Constitution. That must be maintained, for it is the only safeguard of our liberties. I mean, it's not the end of the world to recommend the builder get an hvac guy to look at it and let him make the call.

If you are dealing with a Builder who do you suppose he would have come look at the unit. The guy that installed it. Would you recommend an hvac guy to evaluate or leave it be? Leave it be don't go there you as an inspector with no HVAC training as Blaine stated are only required to operate the unit from its stat to many variables. If you can calculate the heat load go for it if not leave it be. As an HVAC/HI I don't go there unless I am 100% postive that the unit can not cool the home and I will call for a heat load to be performed. I would say this has happened only twice in my tenure as a HI. And there were special circumstances Master HVAC Mechanic Retired Level III Thermographer # 8486 Infraspection Institute CMI Certified Master Inspector Moisture Intrusion Expert Witness As you do not know what your doing (or you wouldn't be asking), I would recommend that you keep away from attempting to report anything on what you suspect concerning equipment sizing.

This evaluation is not within the scope. Guessing will get you in trouble. If you call in an HVAC guy and it's ok, your wrong. If you say it's ok, you might be wrong. Document your findings at the time and date of inspection. Indoor and outdoor conditions. If you write anything beyond your scope, you had better know what your talking about. There are heat/cooling load calculations (which are a hell of a lot more complicated than ton/sf) that can be done. Even the HVAC guy won't likely get it right. The more you say, the more you may get in trouble. First off, unless the system has a zoning system, you can not effectively heat and cool a two story house with one unit. This has to do with the psycrometric properties of air, not equipment design. When the weather changes, the client may get uncomfortable. If you said it was properly sized, they may be knocking on your door, asking for you to explain. Sizing is not the only thing that effects HVAC control.

I think it depends more on number and placement of return air ducts. My home is 2 story and the A/C works fine and there is no zoning. Cold air is heavy and takes more to push it to second floors. Ideally the return air ducts should be at ceiling level to pull the hot air off ceiling imho. thanks for the replies. I simply reported that the ac was working properly at the time of inspection without getting into the size of the unit. I realize that this is beyond the SOP but so are a hundred other things that we do. I just don't want a phone call later on if that unit craps out and they find it was too small for that size house. But, I do understand where everyone is coming from and decided to take that route. If you set the expectations with your client through your pre inspection agreement, and explain to them at the inspection that you cannot tell them through a visual inspection whether the unit is properly sized, you won't get that phone call. If you do get the call, you can remind them what you explained to them at the inspection.