Top-rated boiler installation pros.

Get matched with top boiler installation pros in Diamond Bar, CA

Enter your zip and get matched with up to 5 pros

TRUSTED BY DIAMOND BAR, CA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon1.2k+
    Verified boiler installation services reviews

Find Boiler installation pros in Diamond Bar

Avatar for Air-Tech Air Conditioning & Heating Inc
Air-Tech Air Conditioning & Heating Inc
4.5(
202
)

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 1988

Free estimates

Warranties offered

"Air-Tech installed a 3 zone Mitsubishi mini-split system in our home this in September. We got quote from five companies for the system and decided on Air-Tech because of Larry’s knowledge and experience. The bid from Air-Tech was competitive. Air-Tech was not the lowest priced bid we got, but quality is worth paying for. I can say that out of all the HVAC companies we have worked with over the years Air-Tech surpasses them all by leaps and bounds. When I say this, I am coming from a place of experience. We have built our own house and we come from a family of architects and builders. We also had just finished working with another company (that shall remain un-named) around the same time to replace a different central air system. That other un-named company completed the job late, charged a higher price than what they proposed, and left our house and property a mess. Air-Tech however was knowledgeable, prompt, clean, trust-worthy, and professional. Larry even went out of his way to get our project done faster than their schedule should have allowed at the time. They were scheduling months out when I called during the big heat wave of the summer, but he got our project done in three weeks anyway. I had explained to Larry that we were without heating or cooling at the moment and really needed help. I did not tell him that the urgency was because my terminally ill mother was coming to stay with us and she needed good climate control. While Larry didn’t know about my sick mother, he was able to understand the urgency in my tone I suppose. Larry put an extra crew on the job and oversaw the work himself. The fact that Larry came through for us made such a difference in our lives at the time. I am sharing this story to demonstrate that at the end of the day Air-Tech is a company of people who want to help people and on top of that they are excellent at doing what they do. PS. I also enjoyed the Holiday Card they sent us this year."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+8

Response time5 hrs
39 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Alpine Plumbing, Heating, and Air
Alpine Plumbing, Heating, and Air
4.7(
35
)

Serving Diamond Bar, 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."
Plumbing - Drain Cleaning Project
Sewer cleaned of roots and ready for lining
Prepping pipe for lining by removing massive roots
Mixing resin for liners, this resin gardens to create a solid pipe
Sewer robot in the pipe

+26

Response time9 hrs
10 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for Just Be Cool Supply LLC
Just Be Cool Supply LLC
5.0(
8
)

Serving Diamond Bar, 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!"
Heating & A/C Project
Heating and air
5 ton split system
Heating & A/C Project
Heating and air

+22

7 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Precision Auto Works
Precision Auto Works
4.8(
43
)

Serving Diamond Bar, 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 West Tech Mechanical Services
West Tech Mechanical Services
4.9(
97
)

Serving Diamond Bar, CA and surrounding areas

In business since 2008

Credit card accepted

"This is the first time in many years that I have signed in to Angi. I saw that I still had this pending review to complete. Let me just say, this company was excellent. Would hire them again for a central aircon and heating install project. Middle range price but I think excellent work that you can trust."
2.5 ton Trane furnace
Trane Condenser
Trane 10 ton President
Wall Heater
1964 Trane split system

+8

Recommended by95%of homeowners
Avatar for BALTICA Plumbing-Heating-Air Conditioning-Tankless
BALTICA Plumbing-Heating-Air Conditioning-Tankless
5.0(
13
)

Serving Diamond Bar, CA and surrounding areas

In business since 2006

Emergency services offered

Credit card accepted

"Everyone at Baltica was responsive and eager to please.  Calls and emails were returned punctually in every instance.  Everyone I communicated with was professional and accommodating. 
I called initially to discuss moving to a tankless water heater, but a personal review of my property showed that it was not possible.  Kevin Phidayev, with whom I made the arrangements, was eager to accommodate my product needs, financial needs, and scheduling needs.  Kevin was ultra-responsive to every call, email or request.
The installer, Marius, was particularly pleasant.  He showed up on time every time.  He looked professional, was knowledgeable, and he got the job done on time.  He was happy to accommodate my neighbors in the condo who would be without water for a brief time. Marius left my home clean, and he protected my new floors from damage. 
To be honest, I did not do any comparative shopping for pricing purposes because I was so impressed with my initial contact with this company.  I got all kinds of upgrades I never knew existed.  Marius installed a pressure relief valve, new water valve, new stainless steel flexible water and gas supply lines, and new double earthquake straps, among other things. I have learned from bitter experience that you get what you pay for.  If this water heater seemed costlier than I expected (my only "B" rating), in the end I believe I got my money's worth. 
The level and quality of customer service is unique in my experience.  Truly outstanding.  I have already referred business to Baltica, and would do so again without hesitation."
Before and after
Before and after #2
Recommended by100%of homeowners
Avatar for Southland Heating and Air Conditioning
Southland Heating and Air Conditioning
4.7(
159
)

Serving Diamond Bar, CA and surrounding areas

In business since 1997

Free estimates

Emergency services offered

"From beginning to end all of our interactions with Southland have been positive. Ray who initially consulted with us consistently responds quickly and is great to work with. The lead on our installation, Willie, was professional and efficient, managing a complex job to a timely completion. Follow up by office staff to complete necessary paperwork for rebates has been outstanding."
This is the outdoor unit that offers 17 SEER Hyper efficiency and super quiet operation of 54db's compared to 80 plus on older units
notice the low profile, this is about 14 inch wide instead of the traditional 36 wide.
This replaces your old gas heater
Additional Photos
Additional Photos

+37

Response time1 day
Response rate100%
3 neighbors recently requested a quote
...
Showing 1-10 of 173
Install Boiler questions, answered by experts

The best way to compare HVAC quotes is getting a few detailed quotes from local companies with good reputations. Then, go over the quotes line by line. Protect yourself by insisting on in-person estimates that include equipment manufacturer names, model numbers, SEER ratings, amounts and numbers of materials, details of warranties on equipment and labor, and other specifics. 

Knowing the exact equipment and materials is the only way that you can fairly compare quotes. Quotes that are much lower than others can be a sign that the company isn’t providing the best quality service or materials.

The cost-efficiency of baseboard heaters depends on the type and how you use them. Generally, standard electric baseboard heaters can be expensive to run because they use electric resistance heating, which is less energy-efficient than systems like forced-air or heat pumps. However, hydronic and gas versions are typically much cheaper to operate. Hydronic models are more energy-efficient because they heat a liquid that retains warmth longer, preventing the thermostat from turning on and off as often. The overall running cost is also influenced by local electricity rates, your home's insulation, and your usage habits. To increase efficiency, you can use baseboard heaters for zoning, meaning you only heat the specific rooms you are using.

An expansion tank must always be installed on the supply side, which is the side where the boiler sends water out to heat the systems. That placement allows the water to push against the air and condense properly as it is heated, then circulated through the system. Professional installers can recommend the best place on the supply side for an expansion tank.

If you’re looking for a way to heat your home that is lower in cost and higher in efficiency, you should run the numbers to see what it would look like to switch to gas or electric heat. The best choice for how to heat your home depends on your location, budget, and energy priorities.

The most important sign of a boiler problem is something happening unexpectedly, which is why regular boiler maintenance is important. Unexpected problems can include strange smells, new leaks, and unexpected noises that your boiler wasn’t making before. Additionally, if a boiler keeps shutting off or can’t maintain a specific temperature range, it’s time to call in an expert.

The Diamond Bar, CA homeowners’ guide to boiler installation services

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