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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 HD MECHANICAL INC
HD MECHANICAL INC
5.0(
30
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Diamond Bar, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Emergency services offered

"After recovering from a horrendous experience with Service Champions (NEVER EVER call them), I got several other quotes to completely replace my old AC system. Brandon and HD had the most competitive quote, great reviews and were very personable and professional. They installed entire new system and did a great job in a timely manner. I highly recommend!"
Heating & A/C Project
Heating & A/C Project
Heating & A/C Project
Heating & A/C Project
Additional Photos

+14

Response time6 hrs
Response rate100%
70 neighbors recently requested a quote
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 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 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 Diamond Bar, CA and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"We received about six estimates over the course of a year before choosing to work with Darrow and Mirsky Heating & Air Conditioning. His bid was considerably less than the others, but we chose Mirsky over the bigger companies because he is a real person who treated us like real people and more than just a sale. Darrow took the time to explain he recommended the system he installed and why we didn't need all the bells and whistles other companies were trying to force on us. The work took a full week with permits, when we'd been quoted 2-3 days (by everyone), but we didn't mind. The rule of the triangle says fast, cheap or good -- pick two. Darrow didn't charge us a penny more than the original estimate, despite the many surprises our old setup and the inspectors presented. It's only been a week or two, but our new system is shipshape and working great, just in time for the first heatwave of summer!"
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 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
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Diamond Bar, CA and surrounding areas

In business since 2006

Emergency services offered

Credit card accepted

"The representative from Baltica arrived on time. Quickly diagnosed the problem (where previous plumbers could not), fixed the water pressure valve, advised me on do's and don't in use of the Noritz system. He also advised me that I should change the cap on the water heater, which was confirmed by the Noritz representative when I called the company. I would recommend Baltica any day to any one. Knowledgeable and courteous technicians. Reasonable prices. If you have tank-less water heater, don't use just any plumber, use Noritz certified technician. My heaters were previously incorrectly installed by licensed plumber, but he did not have experience with tankless."
Before and after
Before and after #2
Recommended by100%of homeowners
Home Comfort USA
4.4(
109
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Diamond Bar, CA and surrounding areas

In business since 1977

Free estimates

Emergency services offered

"The access panel on the unit was slightly bent as was the unit. Instead of repairing the installers taped it up with duct tape. The panel fell off and I had to call for another service man to come out and correct the problem. The second technician did a much better job."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Recommended by87%of homeowners
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Install Boiler questions, answered by experts

Hydronic and standard electric baseboard heaters differ in how they operate, their cost, and their performance. Standard convection heaters use electric coils to heat the air directly, while hydronic heaters warm a contained liquid like water or oil, which then radiates heat into the room.

In terms of cost and efficiency, hydronic heaters usually have a higher upfront price but are more energy-efficient and cheaper to run over time. This is because the heated liquid retains warmth, allowing the heater to continue providing heat for a while after the thermostat turns it off. In contrast, electric heaters provide heat more quickly but are less efficient.

Ultimately, the better choice depends on your priorities. If you need a room to heat up fast and have a lower initial budget, an electric heater might be suitable. If long-term energy savings are more important and you don't mind a slower heat-up time, a hydronic heater is likely the better option.

Always consult your manual for specific pressure numbers. Many expansion tanks come pre-pressurized at a specific PSI range, anywhere from 12 to 40 PSI, designed for a range of home boilers. You should not have to pressurize an expansion tank yourself, only the boiler system. If your system has a tank that needs to be manually pressurized, this is generally a job for professionals and their tools.

Safety concerns with propane boilers include proper venting to prevent carbon monoxide buildup, secure gas line connections, and regular inspection of safety controls. Professional boiler installation and annual maintenance are essential to minimize risks. Having a carbon monoxide detector installed in your home is essential for early detection of any leaks or ventilation issues.

To figure out if your boiler is worth repairing or if you need to replace your boiler, first figure out how old the unit is. Boilers last 15 to 20 years, so if your unit is 15 years old or older, it may be better to replace the entire thing depending on the severity of the problems. If it’s not quite that old, then it’s probably worth repairing. Another thing to consider is whether your warranty covers any of the repair costs. If so, it may be worthwhile to repair your boiler to keep it running.

Many HVAC companies offer free quotes and free estimates for repairs and new HVAC systems. Others offer low-cost quotes or apply the cost of the estimates or diagnostics to your final bill if you hire them. Be aware that some companies advertise free HVAC quotes and recoup the costs by charging more for their services. Free HVAC quotes are never truly free—they cost the company time and effort—so be a good customer. Also understand that you may end up paying for free quotes in another way if you don’t hire a reputable company.

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.