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Best boiler installation pros near Pasadena, CA

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    Average homeowner rating
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    Verified boiler installation services reviews

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

Avatar for Global Green Solutions
Global Green Solutions
5.0(
248
)
Boiler or Radiator Heating System - Install or Replace

Serving Pasadena, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Outstanding effort! Our old air conditioner was replaced and a new system was expertly installed by the team from Heating & A/C Repair, Replacement, New Installation. They produced outstanding results, worked neatly, and adhered to the timetable. Unquestionably a trustworthy business."
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+24

Response time3 days
8 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for AC Dave Heating & Air
AC Dave Heating & Air
4.9(
93
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"We hired AC Dave to install a heating & cooling unit, after using them for our old unit's maintenance for years. It was a unit that. went on the roof, so installation was no small task. They did a fantastic job, kept the area clean, were extremely courteous, and we felt like we were hiring family to help us out. They pulled all of the permits which cost extra of course, but it saved us the hassle of dealing with the city and handled the post work city inspections."
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+6

Response time7 hrs
Response rate100%
3 neighbors recently requested a quote
Avatar for HD MECHANICAL INC
HD MECHANICAL INC
4.9(
32
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Emergency services offered

"HD MECHANICAL! I don’t even know where to start, Chris and his team were went above and beyond when doing work at my house. They were honest and and caring which you don’t see from a lot of companies now a days. My wife and i weren’t sure which direction to go in as far as picking a unit to the whole installation process and what we would need. They walked us through it all and were very comforting as they explained every step of the way. I will 10/10 use them again and recommend it to anyone who is needing A/C and heating!"
Heating & A/C Project
Heating & A/C Project
Heating & A/C Project
Heating & A/C Project
Additional Photos

+14

Response time6 hrs
Response rate100%
62 neighbors recently requested a quote
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 Pasadena, 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 CAL CLIMATE CORP
CAL CLIMATE CORP
4.9(
152
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Pasadena, CA and surrounding areas

In business since 1970

Warranties offered

"I've used them a couple of times. I don't think they were the cheapest. It was a big job, so at least three people came to complete the service. It was very clean when they left. They were very punctual, they cleaned up after themselves. They had to cut a hole in our attic; they installed an attic door that we provided to them at no extra charge because they needed to get up there anyway. Their estimator was really friendly knowledgeable, he was excellent."
Response time12 hrs
Recommended by99%of homeowners
Avatar for Precision Auto Works
Precision Auto Works
4.8(
43
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Pasadena, CA and surrounding areas

In business since 1994

Credit card accepted

"I needed an oil change done on my Mercedes. Dave the owner made sure he had all the right spec fluids for my car when I go there. Connie the friendly receptionist was friendl and efficient.. I was in and out quick all fluids topped off, and potential problems brought to my attention, no sales pitch just good old fashioned honest people. We'll do business with them again. Highly Recommended
"
Recommended by92%of homeowners
Avatar for Mirsky Heating & Air Conditioning
Mirsky Heating & Air Conditioning
4.9(
134
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Pasadena, CA and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"They were AWESOME. Same day service and quickly diagnosed the issue (blown transformer, since my furnace does not have a fuse). The guys were professional, courteous, explained what they were doing and why, and couldn't have been nicer. They finished the job quickly, and even installed the NEST which I had done wrong the first time, hence the need to call them. :-P"
CEO & INSTALLER
CRANE
Rheem Puron System
Crane placing unit
Additional Photos

+15

Recommended by100%of homeowners
Avatar for West Tech Mechanical Services
West Tech Mechanical Services
4.9(
97
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Pasadena, CA and surrounding areas

In business since 2008

Credit card accepted

"West Tech Mechanical Services (Joe Gonsalez) did an excellent job. This is the best investment that I have ever made for our quality of life in our home. Joe's attention to detail is evident in the care and consideration that he put into the duct work in the installation process. He thoroughly explained to me the importance of the duct work: location and size of the ducts to maximize the efficiency of the system that he was installing. Our home is an old home, and I really appreciate the care that he took in the installation process. I obtained 3 quotes for this job and West Tech Mechanical was in the middle. All the persons that came to our house were nice people. However, Joe's obvious attention to detail and how he explained the job is what convinced me that he and his company were the right people for the job. For a home owner that is considering the installation of a central air and heat system in their home or, any work for that matter on an existing heat and air system, I highly recommend this company as one that should be considered."
2.5 ton Trane furnace
Trane Condenser
Trane 10 ton President
Wall Heater
1964 Trane split system

+8

Recommended by95%of homeowners
Avatar for DNA Heating & Cooling, Inc.
DNA Heating & Cooling, Inc.
5.0(
13
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Pasadena, CA and surrounding areas

In business since 2016

Free estimates

Emergency services offered

"Our heater broke in the middle of winter, just before my wife started chemotherapy. After getting a bid from a big outfit - who wanted an exorbitant price, and couldn’t get to us for a couple of weeks, Andrew and DNA came to the rescue. Within two days, he and his crew put in a whole new system - including getting the unit off the third story roof of our condo building. We had heat a day before my wife’s therapy started. Andrew’s crew is professional, polite and didn’t leave a speck of dust behind. Totally satisfied and deeply appreciative."
Heating & A/C Project
Package unit upgrade
New indoor unit
Recessed lighting
Package unit upgrade

+27

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

If your boiler is 20 years old, it’s time to get a new one. Although it may seem to be working fine, it’s likely eating up more fuel than it should. Also, compared to a brand-new boiler, one that’s 20 years old is probably not working as well. When you get your new unit, you’ll notice that your home is heating more quickly, and the heat is consistent throughout all the rooms.

A furnace is a big unit where gas, heating oil, or electricity heats the air. The warmed air is then pushed back out through ducts and vents. 

A boiler uses electricity, heating oil, or gas to heat water that is pushed into the room through a radiator. This is one of the oldest and most effective ways to heat a house, but radiators can also be unsightly and leave hot and cold spots in the room.

Heat pumps use a refrigerant to move heat from outside into the house and return it to the room through ducts and vents.

All modern boilers are condensing boilers because they’re the most efficient type. Instead of extra heat leaving through the flue, these boilers trap the heat and use it to heat the house. Whether you choose a combi boiler, system boiler, or regular boiler, you can opt to get a condensing system. If you have an old boiler that’s not a condensing boiler, it’s a good idea to get an upgrade.

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.

Installation costs range from $4,000 to $12,000, depending on unit size, efficiency rating, and labor.

The Pasadena, CA homeowners’ guide to boiler installation services

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