Get matched with top furnace / forced air heating system install or replace pros in Diamond Bar, CA

"In preparation for replacing my HVAC system, I went through a few different estimates. The reason I chose Air-Tech was not because of price, but because I was impressed by the details provided to me. Rod was great. We went into the attic, reviewed all the components inside and out. And we discussed the scope of the work. Once I agreed, he gave me a start date\time. The crew showed up on time and worked hard for two days. Not only was I comfortable with Rod, but the crew was great. My new system is in place and I couldn’t be happier that I chose Air-Tech. If you’re in the market for a new HVAC system, do yourself a favor and call them. You won’t be disappointed."

"Excellent customer service and fast! I highly recommend them, if you need a new system or maintenance this is the company to call!!!!"

"Great experience! I hired Trinity to come out and Tune up and clean my Grandmotherâ s furnace. They were a pleasure to work withâ ¦ very courteous and professional! Extremely clean and friendly! I ended up hiring them to install my Central heating and AC at my home! I couldnâ t be happier!"

"Installed a new HVAC system. They were punctual and professional. I'm very pleased."

"I am thoroughly impressed with the exceptional service I received from HD Mechanical! Their team recently installed mini splits in my home, and the entire experience was seamless and professional. From the initial consultation to the final installation, their expertise and attention to detail were evident. The installers were courteous, informative, efficient, and ensured a precise installation. The mini splits are now providing comfortable and quiet heating and cooling, exceeding my expectations. I highly recommend them for their accuracy, professionalism, and top-notch service. Five stars and a job well done!"

"Excelente work. Fast and efficient. Quiet system and great air coming out in every room. Would recommend to anyone needing any type of heating and air"

"Mr Avery was extremely professional and very informative. He explained the price, which I felt was reasonable and fair. He explained the warranty process. Also informed me on how getting annual maintenance on hvac system extends life expectancy. Will have him out during the winter for a heating inspection"

"Ray arrived when he said he would - which I really appreciated. He was friendly, personable and extremely courteous. He diagnosed the problem very quickly, on my very old system - he even suggested further improvements - and was able to repair it a few hours later. Ray was the first technician to service this unit, and there have been many, whose word I feel I can trust. I highly recommend him to anyone in need."

"NORTHSTAR was strait forward with expense,quality. They were truthful about the age of my machine and what’s involved updating my system. I would recommend NORTHSTAR to any Friend."

"Kayvan was a wonderful service tech! He was on time and professionally checked out the water heater and the HVAC system. He was so polite and friendly. He explained the need for a new filter in the heating unit and showed me photos of the unit located in the attic. He also offered to do a friendly deed for free, which I greatly appreciated, He’s a great asset to Service Champions!"