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  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon756
    Verified boiler installation services reviews

Find Boiler installation pros in O Fallon

Avatar for Air Duct Doctors
Air Duct Doctors
4.7(
781
)

Serving O Fallon, IL and surrounding areas

In business since 1999

Free estimates

Emergency services offered

"We purchased 2 of the deals because we have zoned heating/cooling systems.

in addition to that we had to pay extra for additional vents and mainlines.

I feel like the extras piled up pretty quickly but overall we were satisfied with the job.


"
Before Vent Cleaning
After Vent Cleaning
Additional Photos
Additional Photos
Recommended by92%of homeowners
Avatar for Froggy's Heating & Air LLC
Froggy's Heating & Air LLC
4.2(
143
)

Serving O Fallon, IL and surrounding areas

In business since 2004

Free estimates

Emergency services offered

"Jeremiah was on time and he tried fixing the leaky toilet first. when that didn't work, he replaced the toilet with a new one (pre-purchased by me) and additionally installed a water bidet that I had purchased eariler as well. He offered to dump the old toilet for a fee which I availed and was overall a positive experience. Looking to hire him to do additional plumbing and furnace related work in the future.

"
Working hard for you.
We do plumbing too
Look for our truck
Recommended by84%of homeowners
Avatar for Manson's Heating & Cooling
Manson's Heating & Cooling
5.0(
9
)

Serving O Fallon, IL and surrounding areas

In business since 1995

Free estimates

Emergency services offered

"He works very hard to keep our costs down and help us stay productive.  We call him all hours of the night and seven days a week and he's always there when we need him.  We rely on Kim for all of our maintenance needs when it comes to ac/boiler."
1
2
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Recommended by100%of homeowners
Avatar for Spengler Plumbing, Heating and Cooling
Spengler Plumbing, Heating and Cooling
3.8(
75
)

Serving O Fallon, IL and surrounding areas

In business since 1971

Emergency services offered

Credit card accepted

"The installation itself was very good.  I noticed the old tank leaking at 2:00pm Tuesday - was replaced by 2:00pm Wednesday.  They came out quickly to provide a bid and settled on Spengler that night and they were here at 8:30am the next morning.  The installer was friendly and considerate - top notch.  The only knock will be the salesman himself - a bit high pressure not a big deal because we knew we were going to use them after the research we had done.  He was here for nearly 3 hours looking things over then writing his bid then discussing with us his bid then sitting in his truck while we reviewed the bid then finally signing the contract.  The most disappointing was the discussing about their calendar - he wanted to be sure my wife knew which month he was "featured" - really - cmon man!
"
Recommended by68%of homeowners
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Install Boiler questions, answered by experts

Many HVAC companies offer free quotes and free estimates for repairs and new HVAC systems. Others offer low-cost quotes or apply the cost of the estimates or diagnostics to your final bill if you hire them. Be aware that some companies advertise free HVAC quotes and recoup the costs by charging more for their services. Free HVAC quotes are never truly free—they cost the company time and effort—so be a good customer. Also understand that you may end up paying for free quotes in another way if you don’t hire a reputable company.

The main difference between an outdoor wood furnace versus an outdoor wood boiler is what each appliance is heating. An outdoor wood furnace burns wood to create heat, which warms the air and moves it through the ducts in your home. An outdoor wood boiler uses the heat from burning wood to warm water, which goes through pipes to radiators in the home.

Yes. Boilers need water to run without overheating, also known as dry firing. If you run it without a sufficient volume of water, either because of a burst pipe or a leak, you run the risk of damaging your machine or jeopardizing the safety of your home as a whole. When in doubt, shut off your boiler and repair any plumbing issues before turning it back on. Alternatively, consider installing a low-water cutoff (LWCO) before any issues arise. This gadget will protect your boiler by monitoring water levels and automatically shutting it off if it gets too low. 

Deciding whether or not to replace radiators with a different heating system depends on your personal preferences. Radiators can take longer to heat up than a central heating system, and they take up floor space. However, they can be very efficient at heating, and they keep rooms at a more comfortable humidity level in the winter than forced-air systems.

The absence of heating or hot water, unusual noises like banging or gurgling, and visible water leakage are key signs. Abnormal boiler pressure, flame irregularities (for gas boilers), or pilot light issues may also signal trouble. Frequent cycling, soot or staining, and unusual odors, particularly gas-like smells, should not be ignored. Modern boilers often display error codes or lockout mode upon detecting issues. Uneven heating across radiators and rising energy bills without increased usage can further point to problems. Prompt attention to these signs is essential to prevent further damage and ensure safety.

The O Fallon, IL homeowners’ guide to boiler installation services

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