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TRUSTED BY SAINT JOHN, MO HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon1.7k+
    Verified boiler installation services reviews

Find Boiler installation pros in Saint John

Avatar for Hosack Plumbing Heating & Cooling
Hosack Plumbing Heating & Cooling
4.8(
345
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Saint John, MO and surrounding areas

Approved

In business since 2009

Warranties offered

Credit card accepted

"Very good. Very professional. Explained new codes which resulted in additional parts and work to install. Answered all questions and offersed suggestions on other plumbing items to improve operation and which I could easily perform. Performed installation, tested system and verified existing plumbing continued to operate properly."
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+2

Response time8 hrs
14 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for SmartHouse Heating & Cooling
SmartHouse Heating & Cooling
4.7(
593
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Saint John, MO and surrounding areas

Approved

In business since 1947

Free estimates

Emergency services offered

"Marc spent a good amount of time gathering information and explained everything in detail. He readily answered all of my questions and generated an in-depth report that made my decision pretty easy. His installation crew was very professional thorough and courteous. I’m very happy with my decision and the completed project."
Old boiler being removed
A Manual-J load calculation is performed to determine the precise amount of heating and cooling needed for each space.
Installing a Mitsubishi Hyper Heat Mini Split System to Heat and Cool this Sunroom Addition.
Mitsubishi outdoor unit installed on rooftop to heat and cool 3rd floor of this St. Louis City home.
Daikin FIT Heat Pump Installed in University City Home

+106

Response time2 days
2 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for House Doctor's
House Doctor's
5.0(
3
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Saint John, MO and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Property maintenance is an essential yet often daunting task for homeowners and businesses. Finding the time or the right tools to carry out these tasks can be difficult and exhausting, leading to delays and frustration. At House Doctors of St Louis, we are here to alleviate these challenges, providing reliable solutions to all your maintenance and improvement needs efficiently and professionally.\n\nOur skilled handyman team excels in managing an extensive range of tasks for residential and commercial projects alike. We transform overwhelming to-do lists and stalled projects into completed tasks, ensuring a smooth process from start to finish. Whether it's quick repairs or major renovations, our technicians handle a variety of requests backed by free estimates to initiate the process, thus making your goals achievable.\n\n

Hvac Install
Hvac Install
Hvac Install
Hvac Install
Hvac Install

+1

American Airtemp LLC
New to Angi
Gas Boiler or Radiator Heating System - Install - For Business

Serving Saint John, MO 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 The Gutter Pros
The Gutter Pros
4.5(
28
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Saint John, MO and surrounding areas

In business since 2006

Free estimates

Emergency services offered

"They were absolutely wonderful. They had previously come 3 or 4 times for repairs on the old furnace and only charged me once. The other times they did it for free. They were here for 2 days to do the installation. The new system is very energy efficient. I shopped around and got a very good price. They were very punctual and organized in terms of scheduling. They were here when they said. They were very professional in their explanations about the heating systems. I had a lot of questions and they very patiently answered all my questions. They gave me a lot of options to choose from. They are a totally reliable company. They cleaned up everything and they were very professional. They came when they said. The owner even called and came back a week later to check to see if everything was okay. They wouldn't take any money until I had the system running for a whole week and was satisfied."
Nearing installation completion, Amana S Series is paving the way!
The Team!
Preparing installation of the new, slim unit
These units, just like all the others, require a professional to install.  They are high-tech units and are very impressive.
Additional Photos

+14

Recommended by84%of homeowners
Avatar for Vitt Heating & Air Conditioning Co Inc
Vitt Heating & Air Conditioning Co Inc
4.7(
161
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Saint John, MO and surrounding areas

In business since 1954

Free estimates

Emergency services offered

"I would recommend this company to everyone. Loved they are a small local, family owned business. Our furnace-boiler went out on a Saturday, Monday morning they were out and a quote in the afternoon. They made sure we had heat before Thanksgiving day. Very professional, knowledgeable, great craftsmanship. Best price on comparable equipment out of 3 quotes. Thank you!!"
Military Discounts (retired & active)
Senior Citizen Discounts
Residential HVAC
Multifamily & Commercial Installation & Maintenance
Professionally Installed Ducts

+6

Response time3 days
Response rate100%
Recommended by91%of homeowners
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Install Boiler questions, answered by experts

No, boilers and water heaters are not interchangeable because they serve different primary functions. Boilers are used for central heating systems, providing hot water or steam to heat your home. In contrast, a water heater's purpose is to supply hot water for daily household use, such as for faucets and showers. A water heater alone cannot supply the warm water or steam needed for a central heating system.

While they are not interchangeable, it is common to have both a boiler and a water heater. In fact, a conventional boiler often works best when a water heater system is already in place. The two systems can be combined to provide both heating and hot water, either by pairing a boiler with an indirect water heater or by installing a premade combination boiler-water heater unit. For home heating, some homeowners may also opt for a furnace instead of a boiler.

DIY is not recommended due to safety risks and technical expertise required. Hire licensed professionals.

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.

Boiler installations and replacements cost between $3,600 to $8,400. Expect to pay around $5,900 on average for a new boiler, including installation. Adding new radiators or heaters to the boiler may include separate costs if you are also upgrading those components, so the final price may be higher. To decrease costs, you can look for local energy rebates for using a boiler and wait until installers are offering discounts for a first-time installation.

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 Saint John, MO homeowners’ guide to boiler installation services

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