Professional HVAC Services for Maryland, Virginia & Washington, DC
Delivering Expert Repair, Installation, Maintenance and Replacements Since 1994
Driven by Experience, Committed to Excellence
With a legacy of excellence and innovation set by Mallick Plumbing & Heating (MPH) and Mallick Mechanical Contractors (MMC), Mallick Mechanical Services (MMS) was founded by industry veterans, drawing on over 80 years of experience to specialize in HVAC service, system replacements, and preventative maintenance for both residential and commercial customers. Today, MMS joins MPH in upholding the trusted Mallick name—delivering exceptional service, advanced solutions, and a commitment to lasting relationships.
Tailored HVAC Services for Residential & Commercial Customers
Residential Service
Learn More
HVAC System Installation
HVAC Preventive Maintenance
Learn More
System Analysis & Reporting
Mechanical Room Redesigns
Small Projects
Tenant Fit-Outs
Hunsley
22:03 23 Dec 25
Our oil heat furnace broke on what felt like the coldest day in November, and Mallick Mechanical truly came to the rescue. They were the only company able to come out the same day to assess the situation and provide an estimate. Tyler was wonderful. Very knowledgeable, professional, and incredibly helpful in walking us through the process of converting to a heat pump and installing a new AC unit.
Their communication was prompt, clear, and consistent throughout. Once the parts were ordered, a team came out quickly for installation. Every technician who worked on our home was professional, efficient, and hardworking.
We couldn’t recommend Mallick Mechanical more. Exceptional service from start to finish!
Their communication was prompt, clear, and consistent throughout. Once the parts were ordered, a team came out quickly for installation. Every technician who worked on our home was professional, efficient, and hardworking.
We couldn’t recommend Mallick Mechanical more. Exceptional service from start to finish!
Andy Rayno
16:07 06 Dec 25
Selecting an HVAC mechanical contractor can be challenging, but we were fortunate to have Mallick Mechanical recommended to us by Mallick Plumbing Services, who had recently done an incredible job replacing our hot water heater.
We reached out to Tyler at Mallick Mechanical regarding our planned HVAC system replacement, as ours was nearing the end of its useful life. Tyler came to our home and treated everything with the utmost respect and care. His patience as we asked every conceivable question was remarkable and completely relieved our anxiety. He guided us through the process in a professional, knowledgeable, and caring manner.
His crew was equally impressive. They carefully and neatly removed our entire HVAC system, using new white tarps throughout the house to protect our space, and installed the new components flawlessly. They even managed the ductwork with precision, making everything go seamlessly.
We simply could not be happier with the service provided by the entire team. We look forward to having them continue to check in and perform routine service for the life of our new system.
We reached out to Tyler at Mallick Mechanical regarding our planned HVAC system replacement, as ours was nearing the end of its useful life. Tyler came to our home and treated everything with the utmost respect and care. His patience as we asked every conceivable question was remarkable and completely relieved our anxiety. He guided us through the process in a professional, knowledgeable, and caring manner.
His crew was equally impressive. They carefully and neatly removed our entire HVAC system, using new white tarps throughout the house to protect our space, and installed the new components flawlessly. They even managed the ductwork with precision, making everything go seamlessly.
We simply could not be happier with the service provided by the entire team. We look forward to having them continue to check in and perform routine service for the life of our new system.
LivingSimple Properties
19:39 19 Nov 25
At this point I feel like it’s bad karma if I didn’t post this, but as a property manager in Rockville it’s HARD to find a high integrity HVAC vendor. We provide satisfaction guarantees for our service so we need to keep a high standard. And heating/cooling become financial disasters for our homeowners. So running into Mallick’s team was a dream. We just don’t want them to get too busy for us.
JAVA SURF 61
00:27 12 Nov 25
We are retired homeowners that had to replace one of our HVAC systems-[electric heat pump]. We proceeded to contact companies for their recommendations / estimates- one of which was Mallick Mechanical- who we then chose. What a great choice!!! Their communication/interaction with us was exceptional from first contact thru project completion, from estimator to installers- customer centered, thorough & thoughtful. They made our unplanned, stressful & costly situation into a planned, unstressful & manageable positive experience for us. Thank you Mallick!!!
kathleen McCullers
12:50 25 Sep 25
Mallick replaced our old water heater with a tankless water heater, replaced our old furnace and repaired our middle aged AC unit. They were efficient and very competent. We had a lot going on and they were able to tackle each problem in an efficient manner. Their technicians were knowledgeable and friendly. We would highly recommend them to our friends and family.
Jill K.
21:16 11 Sep 25
Contacted Mallick to replace a 20+ year-old HVAC and heat pump. Had a great experience – reasonable price and fantastic communication throughout the whole process. Tyler patiently answered all of my many questions and was a pleasure to work with. I would definitely recommend this company.
Hooligan USMVMC
18:05 10 Sep 25
Our HVAC system was original to the house (built in 1993) and had been struggling to keep the house cool in the summer and warm in the winter. After shopping around, we found that Mallick offered the best value for the services provided—and they did not disappoint.
They sent out Mike and another technician, and they were true professionals—polite, knowledgeable, and clearly experienced. Over the next two days, I watched them work tirelessly as they removed the old AC and gas furnace system, carefully cleaning up as they went. When it came time to install the new equipment, they were meticulous, ensuring everything was properly set up and all lines were fully insulated.
Mike returned on a third day to complete the installation of the air humidifier. It wasn’t an issue at all, especially since the new AC system was already running and cooling the house beautifully.
Now, our three-story townhouse is cool and comfortable—even on the top floor, which used to be unbearable in the summer.
Mallick did a fantastic job, and I wouldn’t hesitate to hire them again or recommend them to friends and family.
They sent out Mike and another technician, and they were true professionals—polite, knowledgeable, and clearly experienced. Over the next two days, I watched them work tirelessly as they removed the old AC and gas furnace system, carefully cleaning up as they went. When it came time to install the new equipment, they were meticulous, ensuring everything was properly set up and all lines were fully insulated.
Mike returned on a third day to complete the installation of the air humidifier. It wasn’t an issue at all, especially since the new AC system was already running and cooling the house beautifully.
Now, our three-story townhouse is cool and comfortable—even on the top floor, which used to be unbearable in the summer.
Mallick did a fantastic job, and I wouldn’t hesitate to hire them again or recommend them to friends and family.
Nick
22:28 03 Sep 25
I had a great experience with Mallick, Tyler did a fantastic job determining the best size unit for my home, and his proposal was thorough and reasonable compared to the other estimates I received. The technician were quick and courteous and took great care of our home and finished the work faster than expected! I had an awesome experience, I can’t recommend them enough!
Olivia White
17:19 19 Aug 25
Would absolutely recommend this company for any HVAC needs. We needed an entirely new unit, and this crew had the equipment within a single business day and were at our home the following day to install. The path from the street to our outdoor unit location is less than ideal to manage and they did it without complaint or trouble. Quality of the unit is great and everything has been working perfectly so far. 10/10 business and service!
Sonny Oh
15:52 06 Aug 25
After quick diagnosis of leak in our garage ceiling, William from Mallick Mechanical Services, did thorough assessment of situation and offered up and completed a simple and logical solution to the leak!!! So straightforward and very friendly and professional!!
S M
19:02 02 Jul 25
Great work. Our AC went out. A tech was there that morning, we had loaner window AC units that afternoon. System replaced within a week. Very happy with the process. We were able to finance the new system with deferred interest too. Very pleased with the communicationa in service.
Thom Byrnes
21:44 24 Jun 25
Mallick installed a Mitsubishi Ductless split heat pump system in my old log house – unit was properly sized and installation went faster than expected considering the 3″ hole that had to be cut through a 150 year old oak log for the line set. Management and installation crew were courteous and professional at all times – a true 5 star experience!
Matthew Fischer
16:49 24 Jun 25
Our family needed to replace our old HVAC unit. Mallick Mechanical Services responded right away and were able to replace our HVAC unit. The tech that came out was very helpful and knowledgeable about HVAC to help us understand how to maintain our HVAC system to ensure it stays in good shape. We even signed up for a preventative maintenance agreement so Mallick Mechanical Services will ensure everything is running smoothly for years to come. Highly recommend and will definitely use Mallick Mechanical Services again in the future
T P
20:35 23 Jun 25
Great response, great service. A/C thermostat went out and Tyler found the problem, corrected it and am enjoying the results of his efforts. Recommend Mallick for any service that is needed.
Jason Fowler
23:32 23 May 25
Mallick Mechanical Services provided me and my wife timely, professional, and cost effective services when our furnace wouldn’t light.
They were able to almost immediately diagnose the problem and then walked me through several options for repair and replacement. As a new home owner, it was incredibly helpful and comforting to hear the different options, pros and cons, and costs. We ended up needing a simple, low cost pressure switch replacement. Not only were they able to fix the issue quickly, no one attempted to upsell me on a new unit or upgrades to my system.
They were able to almost immediately diagnose the problem and then walked me through several options for repair and replacement. As a new home owner, it was incredibly helpful and comforting to hear the different options, pros and cons, and costs. We ended up needing a simple, low cost pressure switch replacement. Not only were they able to fix the issue quickly, no one attempted to upsell me on a new unit or upgrades to my system.
Response from the owner 15:24 29 May 25
Thank you so much for your thoughtful review, Jason! We’re glad we could help you and your wife get the heat back on quickly and cost-effectively. It means a lot to us that you felt supported and informed throughout the process—especially as a new homeowner. Our team always aims to provide honest recommendations, and we’re glad that came through in your experience. If you ever need anything in the future, we’re here to help!
Kim Coleman
17:28 22 May 25
We hired Mallick Mechanical Services to come out to repair a water leak on the lower level of our home and replace piping and some valves. The complexity of this was that the leak was directly over our electrical panel. While the scale of the project was smaller than that of which Mallick Mechanical normally does, they willingly sent Mike, their technician out to help us. Mike was professional, knowledgeable and fast. In addition to performing the repairs, he was also able to change out some of the shut off valves, making it much easier for us to access. I would definitely recommend MMS to anyone needing residential or commercial HVAC services.
Response from the owner 14:11 23 May 25
Thank you so much for taking the time to share your experience, Kim! We’re glad we could help, and we truly appreciate your trust—especially with the added complexity of the leak being above your electrical panel. Mike will be happy to hear your kind words; he takes a lot of pride in the service he provides to customers. Your recommendation means a lot to us, and we’re here whenever you need us—residential or commercial. 
D Pascha
18:33 02 Feb 24
Hi all
Technicians Naun Gomez and Mr. Ian came out to assess the plumbing issues I had. The pipe pressure was way higher than it should have been. I also needed a new hot water heater and other work performed. They were timely, professional and very knowledgeable. My neighbor next door pipes actually burst. I am so grateful for Ian and Naun. Great service! I would recommend them highly!
D.L.
Technicians Naun Gomez and Mr. Ian came out to assess the plumbing issues I had. The pipe pressure was way higher than it should have been. I also needed a new hot water heater and other work performed. They were timely, professional and very knowledgeable. My neighbor next door pipes actually burst. I am so grateful for Ian and Naun. Great service! I would recommend them highly!
D.L.
Response from the owner 11:10 22 May 25
Thank you so much for the 5-Star Review and kind words! We appreciate your recommendation and look forward to serving you again in the future. 
Stacy Bowe
18:34 14 Jul 23
Luis and Ethan assessed the situation, diagnosed it and were able to make repairs immediately to a pinhole leak in a copper pipe that was causing a lot of damage.
Response from the owner 11:09 22 May 25
We appreciate the kind feedback, Stacy! We’re here and ready to serve should you need any future assistance. 
Wilson Blanco
15:57 18 Aug 21
Response from the owner 11:09 22 May 25
Thank you for your feedback, Wilson. We appreciate you taking the time to share your experience with our team. 
Daniel Shankle
11:00 30 Jul 21
Best job ever
Response from the owner 11:08 22 May 25
We appreciate the 5-Star Review, Daniel!Why Mallick Mechanical Services?
Service: We don’t just meet expectations—we exceed them. Your success is our priority.
Integrity: Honesty and accountability are at the heart of everything we do.
Respect: Treating others the way we’d like to be treated is not just a principle—it’s a practice.
Improvement: We never stop learning, growing, and evolving to better serve our clients.
