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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."
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+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

"It went well. He was on time. He didn't find anything wrong with my system. He said the amount of freon in the system was just right--not too much and not too little. I liked that almost no freon appeared to leak out when he connected his equipment to test the level. He spent a lot of time with me and answered all my questions. He gave me an estimate for the cost of installing a new system. I think he hoped I would buy a new system, but I did not do so. I would buy a new system if I could convince myself that the  electricity savings would pay for the system within a reasonable number of years.
"
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

"Dave was very efficient and knowledgeable. He was able to supply my quote before he left. I look forward to working with Southland heating and air. Follow up: I made my decision and signed the contract. Best decision I could have made. They were thousands of dollars less for the exact same equipment than 3 other companies I got estimates from. When challenged none of the other companies could revise their estimate to even come close. Southland is a Mitsubishi diamond dealer so I got full Mitsubishi warranties plus 1 year from Southland of parts and service. The day the installers arrived, on time, it was raining. Jamie and Ricardo used the utmost care to protect my home. They covered the floors, moved and covered the furniture and made sure before they left that I fully understood how to use the remote and operate the equipment. I have attached a photo so you can see for yourself the way they carted for my home. The equipment works perfectly. I would hire this company again in a heart"
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
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Install Boiler questions, answered by experts

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

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.

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 average lifespan of a boiler is typically between 15 and 20 years, though some may last for as little as 10 years while others can reach 30. A boiler's longevity is influenced by several factors, including the quality of the unit, proper installation, and consistent professional maintenance.

The material also plays a significant role. Older boilers made from durable cast iron can last for over 20 years, with some functioning for up to 50 years. However, it's important to consider their lower efficiency, which can lead to higher utility bills. Modern boilers, often made from steel alloys, are designed to withstand high pressure and temperatures and have an average lifespan of about 20 years.

To maximize your boiler's lifespan, ensure it is installed correctly, have it professionally maintained each year, and address any necessary repairs immediately.

If you want a new boiler that’s going to help lower your fuel bills, you should buy one that has a high energy-efficiency rating. For example, a boiler that is rated “A” uses at least 90% of the energy created by the boiler. And in order to enjoy the best performance, it’s important to have it installed properly by a highly-rated tech.

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.