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

"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."

"I Called to get an in person quote for a tankless water heater flush and left this job with a whole house filter and a fridge connection. When Michael first arrived we inspected the tankless unit and tested the water to conclude flushing was not my best option. He then walked me through my options for home filters and we decided on a Halo system. Michael was very well educated on the subject and gave me the best value filter for my needs. He installed the unit the next day in less than a few hours and left me with a flawless work of art. I couldn't be more impressed with the professionalism he brings to this trade! I also requested to hook up a fridge and he did that in what seemed like 30 minutes. He will be the only plumber I call from now on!! Thank you Michael!!!"

"From start to finish, my experience with HD Mechanical Inc. was exceptional. They expertly installed our outdoor patio heaters and ac unit for my home, ensuring seamless communication every step of the way. Their professionalism was evident throughout the process, and they went above and beyond to meet our specific preferences and built everything to code. Now, thanks to their diligent work, our heaters function flawlessly, delivering the perfect ambiance to our outdoor space. I couldn't be happier with the outcome and highly recommend HD Mechanical Inc. for any heating or cooling needs."

"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!"

"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."

Additional DBA - Precision German Import. Additional phone - (626) 331-6944.

"It went great as always. We used mr Mirsky before he gave me a cood price and the install went as planned we will use him again and tell more freinds and family to use him. He is a joy to be around."

"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."

"My air conditioner broke on the hottest day of the year (113). I went on Angie's list and saw they were highly rated so I gave them a call. It was late in the day when I called, but they were able to come out the next day. The guy was able to get the AC working but said I probably needed a new system. This didn't come as a shock to me....it was getting old. I had gotten estimates before, so I had a dollar figure in my head for what a new system would cost. I called their office and scheduled an estimate. The young man who came out took his time and looked at everything. He explained what he was doing and why. When showing me my options, he didn't try to sell me the most expensive model, but the one that best suited my needs. It wound up being $3000 less then previous estimates I had been given. When it came to installation, their team arrived on time, put coverings down to protect my floors (HVAC is in the attic) and even brought a portable AC unit so I would be comfortable....it was about 110 that day. They thought it would probably take a day and a half, but they got it all done in one day. My AC is working great now. I didn't know how poorly my old unit was working until the new one was installed. I'll have to say that I have been impressed with this company from start to finish. Everyone from the lady who answers the phone, to the estimator, to the installers has been punctual, pleasant and informative. They send e-mails to confirm appointments, usually with a picture of who is coming. Also, the amount I paid for the first repair was deducted from the bill for installation. They are going to be my new go-to people for all heating and cooling from now on."

"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."