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Best boiler installation pros near Thermal, CA

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TRUSTED BY THERMAL, CA HOMEOWNERS

  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon17
    Verified boiler installation services reviews

Top-Rated Boiler installation pros in Thermal - Updated Nov 2026

Avatar for Absolute Air Conditioning And Heating
Absolute Air Conditioning And Heating
4.9(
78
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Thermal, CA and surrounding areas

Approved

In business since 2002

Free estimates

Warranties offered

"Brian showed up on time and was very honest and friendly.  He performed the seasonal maintenance on our AC which was installed a few years ago by a different company.  I appreciate that he gave us an honest assessment of our system.  He was very thorough in what he did, going through each component.  We have a split air return system and the original installers had blocked off one side to meet the SEER rebate requirements, but makes the noise level a little louder.  I asked Brian if we should open up the 2nd side and he took the time to do an evaluation without charging us extra.
We were very happy with the service and price we got and feel we can trust Brian.  We'll be using Absolute Air from now on.
"
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10 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Water Heaters Only, Inc
Water Heaters Only, Inc
4.7(
440
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Thermal, CA and surrounding areas

In business since 1968

Free estimates

Emergency services offered

"My water heater was leaking but glad that I contacted water heater only. I called at 10:00am and by 12pm they were here installing my new water heater. David from Water Heaters Only came in the afternoon of 6/12/18 and it took 2 hours to install to city and state code. He had all the parts and tools to change the water heater on the spot. Old heater was taken away and new heater installed by 2pm.. I would highly recommend Water Heaters Only. They were very professional and courteous."
Our technician Fabian getting ready to drain a water heater.
A newly installed 40 gallon residential water heater.
A tankless water heater installed in a garage.
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+2

Recommended by94%of homeowners
Avatar for California Comfort Air Conditioning and Heating
California Comfort Air Conditioning and Heating
4.8(
21
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Thermal, CA and surrounding areas

In business since 1999

Emergency services offered

Credit card accepted

"

Thermostat screen went blank-furnace and A/C wouldn't come on

Chris arrived within 1 hour of my call and checked the furnace first. He found a blown fuse and no power to low voltage wires inside the unit. He then checked the thermostat and found it was no longer working. Chris replaced the fuses and the thermostat with a similar unit and tested the entire system. He then checked my A/C unit for Freon levels and found and repaired a wire that had come loose.

Chris was very pleasant to work with and explained what he was checking and why as he went along. He explained how the new thermostat worked and provided me with both the installation and operating manuals. Great service!  


"
Truck
Laguna Install
Laguna Install
Laguna Install
Recommended by100%of homeowners
Avatar for Bob & Marc Plumbing Heating & Air
Bob & Marc Plumbing Heating & Air
4.5(
104
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Thermal, CA and surrounding areas

In business since 1989

"Evening of Valentine's Day we learned our water heater had broken.
Called Bob & Marc the next morning and had an appointment of 3 pm. They were available earlier, but I could not get out of work any earlier.
Spencer was on time and got right to work. He was very professional, careful and friendly.
He assessed that the water heater was broken, drained and removed the old one and installed the new one.
He made sure that the TPM piping was exact, fit and would last. He was very helpful in explaining what he was doing and was even very helpful in providing advice on how to extend the life of this new water heater.
He cleaned up and all that was left was a professionally installed water heater that has been working great.
Thanks for the quick, friendly service (also be sure to use the 10% off coupon found on their  Angie's list page).
"
Recommended by89%of homeowners
Avatar for All Pro Plumbing, Heating, Air & Electrical
All Pro Plumbing, Heating, Air & Electrical
4.1(
93
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Thermal, CA and surrounding areas

In business since 1991

Free estimates

Emergency services offered

"He arrived and first tested the pilot to make sure it was functioning properly. It was not due to small leak that would extinguish the pilot. He then purchased a new water heater and installed it. He made sure that the earthquake strappings were properly set and took the defective water heater with him for disposal.
He was extremely polite and left the work area cleaner than it was when he arrived. This is the 2nd time that I used All Pro and in both instances the technician was prompt and efficient. I would not hesitate to use this company again.
"
Recommended by75%of homeowners
Avatar for North Air
North Air
4.5(
24
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Thermal, CA and surrounding areas

In business since 1994

Emergency services offered

Credit card accepted

"They were really good. They were helpful and really quick on getting back to us. We called him on a Tuesday and they came out on Saturday to get the job done. There was one hiccup with the installation. They felt that they would be able to use the hand lift, but when they figured out they wouldn't be able to use the hand lift, most instantly he went and called for a crane and we had a crane service set up the same day, so nothing slipped on the schedule. They were not the cheapest, but their service was satisfactory."
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Recommended by86%of homeowners
Avatar for Green Air Cooling
Green Air Cooling
5.0(
11
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Thermal, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"On time and honest. I have very old but still working systems (20+ y.o. a/c and 30+ y.o. furnace). I told the technician that I use them infrequently. He was practical and suggested that I replace both systems when one of them quits working. Didn't try to up-sell for services I don't need. Suggested some services, but at the same time, didn't push for it since the systems are at end of life. Overall I felt comfortable doing business with them in the future."
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+4

Recommended by100%of homeowners
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Install Boiler FAQs, answered by experts

In most cases, repairing a radiator is more affordable than replacing it. A typical repair may cost between $100 and $200, while a replacement can average $1,500, with a range of $250 to $2,500 depending on the unit type. Radiator issues are often simple fixes for a professional, such as a blown fuse, malfunctioning thermostat, or a loose valve, and can take less than an hour. However, if the long-term costs of fixing the radiator are higher than replacement, it's better to get a new model. It is recommended to consult a heating expert to diagnose the problem and determine the best solution for your situation.

Professionals can recommend efficient layouts or appliances and ensuring regulatory compliance.

Boilers provide even heating, energy efficiency, and a quiet operation compared to forced air systems.

Costs range from $3,000 to $7,500, depending on system size and efficiency.

A furnace takes in cool air, heats it through the burner and heat exchanger, and sends the air on its way to warm your home. A boiler is a pressurized vessel that produces hot water or steam to heat the home and provide hot water. A boiler may or may not work together with a furnace.

The Thermal, CA homeowners’ guide to boiler installation services

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