Residential HVAC Service

What We Offer

At Mallick Mechanical Service, we believe homeowners deserve the same high standards we deliver on commercial projects—without the commercial price tag. That’s why our residential HVAC services focus on long-term system performance, expert installation, and personalized support across Gaithersburg, Montgomery County, Howard County, Frederick County and Carroll County.

What Services We Provide

At Mallick Mechanical Services, we provide residential HVAC services that prioritize long-term performance, comfort and energy efficiency. Whether you’re replacing an outdated system or servicing your current unit, our team delivers commercial-grade quality with a personal and empathetic touch.

Homeowners in Gaithersburg, Montgomery County, Frederick County, Howard County and Carroll County trust us for:

Equipment Installation & Replacement
Heating
Air C onditioning
Indoor Air Quality
Preventive Maintenance
Thermostats | Smart Thermostats
And Much More

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Why Choose Mallick Mechanical Services?

Professional Service & Well-Trained Technicians

When you choose Mallick Mechanical Service, you will know you will be well taken care of by a team that is empathetic, understanding, friendly and passionate about serving you. Whether you need a minor repair or a major system replacement, you can rely on each one of our Mallick Mechanical Service Team Members to take care of you with honest, clear communication and. a commitment to getting the job done right – the first time.

Financing & Special Offers

We understand that you can’t really pick and choose when your HVAC System breaks down or stops working as it’s supposed to – which is why we offer financing and special offers to help make the unexpected repairs fit to every budget without compromising on expert service.

Preventive Maintenance Offers

Regular maintenance is the key to keeping your HVAC system running efficiently and avoiding costly breakdowns – while also keeping you and your family comfortable 24/7. Our preventive maintenance offers are designed to give you peace of mind year-round – helping extend the life of your system, lower energy bills, and catch small issues before they turn into major problems. It’s a smart way to protect your investment and stay comfortable in every season.

Mallick Mechanical Services

4.9

Based on 20 reviews

review us on

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.

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.

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.

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.