EXXEL Mechanical Services


Light Commercial & Residential HVAC Mount Airy, MD 

Quality HVAC in Mount Airy 

Exxel Mechanical Services is a local HVAC company that homeowners and businesses in Mount Airy rely on for expert care and ultimate comfort all year round. 

We offer solutions for all your HVAC needs, including installation, maintenance, and repair – but we don’t stop there. We also provide air quality and home generator services for perfect air even when the power goes out.

Building great relationships with our neighbors is a top priority – so when you work with Exxel, you can expect exceptional service and quality craftsmanship, every time.  Read on to learn more about us and contact us today to get started with a free quote!

Our HVAC Services

Air Conditioning

Our HVAC technicians will make sure your home or business stays cool during the summer with our AC repair, maintenance, and replacement services!


From heat pumps and warm air furnaces to boilers, we offer superior heating services to repair, maintain, or replace your equipment to make sure it's functioning properly.

Indoor Air Quality

We offer several tiers of air purification to fit your needs. We also offer HRV, humidifiers, & installation of smart thermostats.


We will help you choose the perfect size generator, the right fuel source & the best installation locations for your generator & transfer switch.

Tailored for Your Satisfaction & Peace of Mind

Mount Airy Heating and Air Conditioning Services  

two new heat pump installations outside of a yellow house

HVAC Installation Services

Replacing your HVAC can feel like a high-pressure decision – especially when your existing equipment is broken down!  As an experienced heating and air conditioning contractor, we have the know-how to make sure you get the right equipment at a reasonable price. Count on us for a quick turnaround and careful install process that respects your time, your property, and one of your home’s biggest investments.

one of our technicians kneeling next to a large exterior air conditioning unit testing the refrigerant pressure

Preventative Maintenance

Routine maintenance is critical for making sure your HVAC performs efficiently for as long as possible. The trick is to remember to get it scheduled! That’s why we’re proud to offer our HVAC maintenance plans – you’ll never miss your annual evaluation, and you’ll enjoy exclusive perks and discounts! Whether you’d like to request a single appointment or to sign up for one of our affordable plans, we’ve got you covered. 

Avoid pricey breakdowns — proactive maintenance with Exxel will help your HVAC go the distance. 

one of our technicians kneeling next to a large exterior air conditioning unit testing the refrigerant pressure
hvac technician holds a drill while working on an air conditioner repair

Expert HVAC Repairs

Even if you’re taking good care of your HVAC with routine checkups, your heating and air conditioning may experience performance issues or breakdowns over time. When the unexpected happens, you need a contractor who truly cares about your comfort and satisfaction to step in and get things running correctly again.  That’s why at Exxel, we provide services round the clock to restore comfort as quickly as possible. Why wait? Call Now to get your Mount Airy heat pump or air conditioning back up and running ASAP!

24/7 Emergency HVAC Services

Whether it's early in the morning or late at night, we're here for you with our quality Mount Airy HVAC services when the unexpected happens to your heating or air conditioning unit. Give us a call - our team is standing by to assist you and will work efficiently until the issue is solved!


Your Reliable Heating and Air Conditioning Contractor

our owner, bob gunning, with a client holding an Exxel yard sign

Great Customer Service

As a small business, your satisfaction is very important to us! We believe that the best service means offering expert advice, top-quality products, and friendly, honest communication - and that's just what you'll get with Exxel!

Commitment to Quality

Our technicians take pride in their work. We use only high-quality products and materials we'd want in our own homes, and we stand behind our craftsmanship all the way.

24-Hour Emergency HVAC Services

We're dedicated to responding quickly to your calls, addressing your concerns, and providing timely solutions to restore comfort to your home or business.

Fully Licensed & Insured

Our highly trained technicians have plenty of hands-on experience providing Mount Airy HVAC. Their expertise means that you can expect meticulous installations, efficient repairs, and reliable maintenance for your heating and cooling needs.

Reviews From Our Customers

Based on 55 reviews
Paul Baker
Paul Baker
Needed a repair of my oil furnace. Owner came in person and fixed the furnace right away, and it has been working great since. Cost of maintenance contract is very reasonable, and they are top notch in maintaining HVAC systems. Highest recommendation.
Kenneth Dougherty
Kenneth Dougherty
Had them replace a central air conditioner. They came right out. We discussed selection, pricing. They were out the next day. Did a great job! Quickly, no mess left and no call backs. Had a problem 2 years later. I called they came right out. Great service!
Michael Ahl
Michael Ahl
Our 23 year old A/C died, Bob from Exxel came out the next day, tested everything and found many problems. We decided to go with a new system due to the age of the old and he gave a great quote, came out the next day again and quickly and cleanly installed and test the new system. He also gave great advice on keeping it running. We were very impressed/
Luna A
Luna A
Love Exxel MS. I had leaks in 2 of my radiators, called Bob at Exxel and told him what was happening. He came out quickly and he and his apprentice fixed the issues in no time at all. Then I had them back in Sept 2023 to be sure my system was ready for winter. I do a maintenance contract plan with them. Very knowledgeable, professional, honest. Never had any issue with the work done. (2022) Needed to have a boiler checked out. Checked Angies List. Called, was told they don't really do AL anymore. (I stated that is how we found their company) and he fit us in to come inspect it in case it was something simple. Came back a few days later made the repairs. Very prompt, courteous, explained things, and was done in no time at all. I am very glad we found Exxel. Priced reasonable, honest - did not try to get us to purchase more parts or say he saw other problems when there weren't any. Left no mess. He went above and beyond for us and we are very grateful. Total cost, around 1K.
Mike Lembach
Mike Lembach
Bob and Dan were excellent. Called on a holiday and they were early the next morning. Very kind, courteous and professional. Highly recommend and pricing was very reasonable. We signed up for an AC plan. Thanks again guys and see ya next time.
Thomas Smith
Thomas Smith
Bob came highly recommended by a local plumber who'd already done 2-3 jobs at our home. I was looking at different options for heating and cooling and we were very satisfied with the final results. Pricing was competitive. Work was done on time as promised and Bob couldn't have been any more cooperative. I'd recommend Exxel Mechanical Services to anyone looking for service or upgrades to the existing HVAC Systems.
Jeff Savakinas
Jeff Savakinas
Exxel has my business for the foreseeable future. They are professional. They keep you informed of their arrival time and what needs to be done to resolve your issue. Their pricing is reasonable. Their knowledge base far exceeds anyone else I have dealt with. Their work is excellent. I couldn't be happier.
Jeffrey Rose
Jeffrey Rose
Bob and his team were very professional. Showed up on time and got the work done in a timely manner. I recommend Exxel Mechanical to everyone.
Jameson Kisling
Jameson Kisling
I was a previous AQuality customer and when they were bought by FH Furr, I thought it would be a seamless switch. We have a geothermal system and FH Furr said they had a few people that were still qualified to service geothermal. After sending people out on 2 different occasions, with no geothermal experience I called back and was told no one there does geothermal. That's when I called Exxel. Bob and Eric came out the same week and serviced my unit and noticed some filters that had likely never been cleaned before. We will be using them again!
Peter H (pistolpete_84)
Peter H (pistolpete_84)
Bob installed a new hvac unit in my place in July after my old one died. This morning I woke up to the thermostat not powererd and the heat not running. Bob quickly replied to my early morning email and was down checking things out a few hours later. Seemed to be due to an old circuit breaker which wasn't even needed due to the new unit having it's own. Bob bypassed the old unnecessary breaker. Easy to ask questions and work with!

Tips From Our HVAC Experts

Woman Thinking
ac unit age

Should I repair or replace my air conditioner?

The thought of replacing your AC unit is never a happy one. But, depending on the costs you are putting up with to keep your unit running, perhaps replacement is a better idea than the status quo. Check out our article on repairing vs. replacing your AC unit:

Read More »

Serving Mount Airy & Beyond

Exxel is a premier HVAC contractor serving homeowners and businesses in Mount Airy, MD, and throughout central Maryland for over two decades. Head to our service area page to learn more.

Whether you are located in Mount Airy or nearby communities, you can rely on us for all your heating and air conditioning, air quality, and backup power needs.  Not sure if we come to your area?  Give us a call and we’ll be happy to clarify.