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TRUSTED BY ALTON, IL HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon373
    Verified boiler installation services reviews

Find Boiler installation pros in Alton

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services
3.4(
354
)
Electric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install

Serving Alton, IL and surrounding areas

Approved (Corporate)

In business since 1993

Free estimates

Emergency services offered

"They came out within 24 hours and I appreciated their promptness. They didn't charge me anything to come out and their quote seemed very reasonable for what they were asking. What stood out to me more than anything else was that they weren't stuck on any one brand of furnace or A/C unit. They marketed a wide variety of different brands and they picked the one that was the best to fit my needs. They found the best furnace for the size, the best efficiency, and the best cost. They're not getting a commission by pushing a particular brand like a lot of the others are. I think they could've done a tiny bit better on their pricing, but other than that the experience with them turned out to be was real enjoyable."
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+5

197 neighbors recently requested a quote
Recommended by74%of homeowners
American Airtemp LLC
New to Angi
Gas Boiler or Radiator Heating System - Install - For Business

Serving Alton, IL and surrounding areas

Approved

In business since 2008

Credit card accepted

Offers commercial services

American Airtemp LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.\n

Response time10 mins
Response rate100%
Avatar for Triplett Mechanical Services
Triplett Mechanical Services
4.9(
35
)
Gas Boiler or Radiator Heating System - Install - For Business

Serving Alton, IL and surrounding areas

In business since 1995

Free estimates

Emergency services offered

At Triplett Mechanical Services, we have been satisfying customers HVAC needs for over 13 years. Although we are a small company, we are quick to respond, and very competitive in our pricing. The work we do in our chosen trade is extremely well done and our materials are of the highest quality as well. Perhaps the thing we are proudest of is our ability to have a clean work environment at all times. Naturally, our desire is to always completely meet or exceed your needs as a consumer. When you have HVAC needs, we can fix it and in a timely fashion.

Response time10 hrs
Recommended by94%of homeowners
JMW Mechanical Heating & Cooling
4.7(
15
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Alton, IL and surrounding areas

Credit card accepted

"Very professional company. He returned my call promptly, came out to install my water heater in timely manner, and followed up after job was finished. He went above and beyond to make sure everything was up to code. I have no negative feedback for this provider."
Recommended by92%of homeowners
Avatar for North Alabama Technical Services
North Alabama Technical Services
4.9(
124
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Alton, IL and surrounding areas

In business since 2010

Emergency services offered

Credit card accepted

"When my computer refused to boot up, I took it to Jim and he diagnosed a virus infection as the problem. He got the machine working again by installing a new hard drive and adding more memory for increased performance. Just a couple of weeks later, the computer again was having problems. This time, Jim dianosed the culprit as being the machine's original memory. While I decided not to remove and not replace the faulty memory for the time being due to cost, Jim upgraded my operating system to enhance the overall system performance. Jim was very professional and timely and was very sensitive to my concerns. Communication is excellent."
2014 Super Service Award Winner!
Additional Photos
Recommended by97%of homeowners
Avatar for Spengler Plumbing, Heating and Cooling
Spengler Plumbing, Heating and Cooling
3.8(
75
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Alton, IL and surrounding areas

In business since 1971

Emergency services offered

Credit card accepted

"Jody did a great job and was very professional.  My only complaint is the price seemed a bit excessive.  I did receive a discount using an internet coupon, so that did help some. Considering it was less than 1 hour of work and the cost of the part was probably less than $200, I would not expect labor costs to be so high.  Typically I will not use a company who I feel overcharges, but I really had little choice this time.  I understand it was after hours when the work was performed, but I requested service during normal hours.  Unfortunately they were backed up with service calls, so it was 8:30 PM before he was able to arrive.
I am grateful that I was able to get the pump replaced.  I just wished it was not so expensive.  I fully support our local businesses and that's why I use them.  However, sometimes they make it hard to come back for services.  If I had an option, I probably would have shopped around more before choosing a company.  This was a crisis, so no time to research and schedule an appointment.

"
Recommended by68%of homeowners
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Install Boiler questions, answered by experts

Safety concerns with propane boilers include proper venting to prevent carbon monoxide buildup, secure gas line connections, and regular inspection of safety controls. Professional boiler installation and annual maintenance are essential to minimize risks. Having a carbon monoxide detector installed in your home is essential for early detection of any leaks or ventilation issues.

Scale from hard water is hard to diagnose until it starts causing problems. If your area has particularly hard water, that’s most likely what your boiler is using. If scale build-up becomes a problem, it starts to cause decreased flow and heating, and eventually, valve failures as valves become blocked. Let boiler professionals know if you’re worried about scale and they can offer advice or implement a solution.

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.

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. 

Most home boilers will need an expansion tank. That’s because these boilers are closed-loop systems, where the water is trapped. An expansion tank is needed when the boiler heats the water and it expands, allowing air to condense in the tank to make room for the water. Other types of boilers don’t use an expansion tank, such as traditional steam boilers, but these aren’t as common. And hot water tanks may be able to use a pressure release valve instead. When in doubt, call in a pro to take a look.

The Alton, IL homeowners’ guide to boiler installation services

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