What is the most common rule used for HVAC load calculation?

• <div><p>A common HVAC rule is that for every 500 to 600 square feet of living space, you need 1 ton of heating or cooling capacity. Now that you know this common rule, you also need to know that it isn’t very accurate, and a dedicated pro wouldn’t use it for your home. If you talk to a pro who won’t or can’t perform a proper Manual J calculation, consider hiring someone more thorough.</p></div>

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*The Angi rating for Boiler Installation companies in Tremont, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Installation needs.

*The HomeAdvisor rating for Boiler Installation companies in Tremont, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Installation needs.

Last update on January 19, 2026

Reviewed in December 2021
The entire experience was beyond excellent. The price and quality of material far surpassed other companies that I received quotes from. The installation exceeded expectations.
Four Seasons Gutter Protection Company
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Reviewed in March 2021
Had a chimney repair but when he came he noticed that my chimney caps were missing. He went and bought 3 caps and also installed them. Completed the job very timely and was very satisfied with the price. Did a great job and did not leave a mess. I certainly would hire Will again for my next...
Ratliff Masonry
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Reviewed in May 2019
Mr. Carlyle is dependable and very professional. I hired him through Home Advisor to install a vinyl fence in my yard and the installation is excellent. I really enjoy looking out my window at the new fence, Quinton takes great pride in his work which is apparent by the finished product. I would...
Carlyle Construction & Remodeling
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Reviewed in December 2016
Everyone from the beginning estimate to the end of installation was professional, knowledgable, and courteous. The installation was done on time and as promised. I highly recommend Fritch Heating and Cooling. You will not be disappointed if you choose them for your heating and cooling needs.
Fritch Heating & Cooling, Inc
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Reviewed in January 2015
Dan was extremely pleasant and professional, neither one easy to accomplish on the bitter cold winter day we had in January. He was punctual, completed his job in about 30 minutes, spent another 5 minutes greasing and oiling all the moveable parts, even the ones he did not install. A...
Greg's Garage Door Service Inc
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Reviewed in September 2014
Bill was very responsive. I had contacted him regarding a defective thermostat on a house we had just purchased. Bill had installed the furnace, etc last year and the thermostat was still under warranty. He came out the same day, took his shoes off when he entered our house and inspected and...
Bill Irwin Heating & Air Conditioning
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Reviewed in August 2014
Mr.. Cargill was very prompt for the appointment to estimate the job and on time when he did the installation. Mr. Cargill and his associate were very professional and efficient. His quality is outstanding and his price is not the cheapest but a good value. He has 18 years experience and...
Todd Cargill Seamless Gutters
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Reviewed in April 2014
He was very thorough, we did like him. We considered using him, we were looking at the kitchen area but got carried away and he seemed willing to go beyond that. He did say it will take a little while to make a bid from us. We have not yet heard from him. We have decided on a contractor and so...
RO Properties and Remodeling
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Reviewed in December 2013
The Chimney Doctor cleaned and examined my fireplace, installed 2 new caps on the chimney, replaced a valve, gas starter pipe and gas logs. Todd was great. He didn't try to sell me things I didn't need and gave me options on other services. He was professional, prompt and thoroughly addressed...
The Chimney Doctor
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Install Boiler questions, answered by experts

Most experts recommend getting three to five HVAC quotes from licensed, insured, reputable local heating and cooling companies. Getting multiple detailed HVAC quotes (but not too many) lets you compare the equipment, services, and prices of several contractors without being overwhelmed by options. It can also let you see if one contractor’s prices are much higher or lower than the others and give you a chance to ask for clarification. That way, you can weed out any contractors who aren’t providing quality services or materials and find the company that best meets your budget, quality requirements, and long-term goals.

You can use a boiler and a furnace, although it’s not common to use both for whole-house heating. For example, your furnace may take care of HVAC heating through your vents, while a boiler powers your floor-based radiant heating in the bathrooms. Mixing and matching like this gives homeowners a variety of heating possibilities.

A common HVAC rule is that for every 500 to 600 square feet of living space, you need 1 ton of heating or cooling capacity. Now that you know this common rule, you also need to know that it isn’t very accurate, and a dedicated pro wouldn’t use it for your home. If you talk to a pro who won’t or can’t perform a proper Manual J calculation, consider hiring someone more thorough.

Boilers are used mainly for central heating, and water heaters are used for ordinary household water use. In fact, a conventional boiler works best if your home already has a water heater system in place. Sometimes a boiler can be combined with indirect water heaters. But there are also premade combination boiler heaters.

If you’re looking for a way to heat your home that is lower in cost and higher in efficiency, you should run the numbers to see what it would look like to switch to gas or electric heat. The best choice for how to heat your home depends on your location, budget, and energy priorities.

The Tremont, IL homeowners’ guide to boiler installation services

From average costs to expert advice, get all the answers you need to get your job done.

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