4.6 
833 *The Angi rating for Boiler Installation companies in Duarte, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Installation needs.
*The HomeAdvisor rating for Boiler Installation companies in Duarte, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Installation needs.
Last update on June 24, 2026
Serving Duarte, CA and surrounding areas
Approved
In business since 2005
Free estimates
Emergency services offered
"The new heating system was installed perfectly and works wonderfully. They were careful, neat, and professional. Definitely recommend their service. The whole process was smooth and stress-free."
+24
Serving Duarte, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2014
Free estimates
Emergency services offered
"He was thorough, knowledgeful, listened to my concerns, respectful and got the job done quickly and efficiently with my plumbing problem. I would recommend Alpine Heating, plumbing and electrical services to anyone...and do recommend them."
+26
Serving Duarte, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Emergency services offered
"I’m so glad I called HD mechanical to have my thermostat fixed. We set a time to meet up and he was there on time and very professional. He was very thorough with his work and explained to me all the work he performed. He even checked and serviced my unit, showing me that my filter needed to be changed. Would definitely recommend to anyone who needs and service/repairs done."
+14
Serving Duarte, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Emergency services offered
"I needed my HVAC system urgently repaired, the technician arrived promptly to resolved the issue. They were professional and knowledgeable and gave me honest recommendations & also was very helpful. Highly recommend! Thank you!"
+22
Serving Duarte, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2005
Free estimates
Emergency services offered
"These guys were great. They did a great installation. It was completed quickly & at a better price than the other companies I checked. I highly recommend this company, & will use them for any of my HVAC needs in the future."
+19
Serving Duarte, CA and surrounding areas
Approved
In business since 2001
Free estimates
Credit card accepted
Don't trust your property to a less qualified team. Contact our highly trained experts for quality service.
Serving Duarte, 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."
+2
Serving Duarte, 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."
Serving Duarte, 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
"
Serving Duarte, CA and surrounding areas
In business since 1998
Free estimates
Emergency services offered
"PERFECT INSTALLATION WITH VERY PERSONABLE AND RESOURCEFUL PROFESSIONALS. I WOULD RECOMMEND THEM HIGHLY"
+15
From average costs to expert advice, get all the answers you need to get your job done.
The average boiler installation cost depends on size, system type, and other factors. Keep reading to learn the cost of a new boiler in Los Angeles, CA.
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