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ABC Cooling & Heating LLC
- Property
- Home
“Mike came to the house within an hour on a Friday, he gave me a quote that was far below any other company I received quotes from and on Wednesday the work was completed.”
Best HVAC Contractors in Dundalk, MD
24 companies listed · 6 in Dundalk · 11 open 24/7 · 16 open weekends · all 24 rated 4.5+
Data verified October 21, 2026
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Reliability Home Services
- Water Heater
- Inspection
- Faucet
“The VIP service was excellent and I would recommend Reliability Home Services to anyone looking for installation, service and repair for any of the services they provide.”
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Pinnacle Heating & Air Conditioning
- Units
- Heat Pump
- Clean
“I work with Pinnacle as a HVAC Supplier, and they always have a courteous, professional attitude and always place their customers needs and satisfaction at he top of their list.”
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Tack Mechanical LLC
- Tech
- Polite
- Heat Pump
“I let Tack handle this task while I was gone at work, so communication in this transaction was key they answered all of my annoying questions and never seem bothered.”
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Langenfelder Mechanical Inc
- Company
“Professional, fast, clean, and safe.”
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Bamford Plumbing & Heating Inc.
- Pricing
- Work
- Text
“They never price gauge, always are timely, the pricing is more than reasonable, and they refer you to another service provide if something is not in their wheelhouse.”
The 24 companies listed for Dundalk, MD work on furnaces, heat pumps and air conditioners. Each profile repeats what the company publishes about its hours, its license and the equipment it fits, alongside ratings and quotes drawn from public reviews.
Area overview: Dundalk, MD
Of the 24 companies we list here, 6 are in Dundalk itself and 18 come from towns including Baltimore (8, 7 mi), Essex (3, 4 mi) and Timonium (2, 14 mi). The companies on this page are rated from 4.5 to 5.0 across 5,183 reviews; 19 have 50 or more reviews. When customers rate these companies on specific qualities, they most often praise professionalism (92%), responsiveness (86%) and quality (82%). 11 are open around the clock; 16 are open on Saturdays and 13 on Sundays. The services the companies on this page list most often on their websites are AC repair (2), AC services (2), air conditioning (2), commercial hvac (2) and duct cleaning (2). 12 show a license on their websites; 2 list staff certifications (EPA and NATE) and 12 have a BBB rating of A or A+. 19 have ten or more years of experience, the longest 89 years. 13 offer emergency call-outs; 16 offer financing or payment plans; 9 give free estimates; 9 are family- or locally-owned and 13 list coupons or special offers. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Why do some of these firms show another city?
6 of the 24 companies are based in Dundalk; the others come from other towns within 20 mi. This trade drives to you, so a shop over the county line is normal. Ask whether your address carries a travel charge.
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Maryland Heating & Air
- Questions
- Diagnosed
- Work
“Thanks to Sherman who was very knowledgeable and handy got my heat working right out such amazing work Sherman if I could give u 10 stars I would 😀 …”
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Chason Service Engineers Inc
- Jury
- Diagnosed
- Unit
“They could have tried to upsell me to a Heating Unit as well but instead said I probably had a few good years left and serviced the Heating Unit at no additional cost.”
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Fresh Air Concepts
- Furnace
- Water Heater
- Advice
“We were replacing a mini spit system that had a power surge and had a less than stellar install, they came in and corrected all the previous mishaps and installed a new mini split.”
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A.J. Michaels
- Questions
- Pipes
- Understand
“They came on time, laid plastic down on the carpet to make sure they wouldn't stain it, showed me what they were going to do, answered all my questions, and respected my need for them to wear masks.”
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SM Mechanical LLC
- Electrical
- Energy Audit
- Boiler
“We have worked with SM Mechanical on several issues and they are always very professional and one of the few service companies that have tried to repair or fix an issue with an appliance rather than just simply replace expensive equipment.”
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All Good Home Inc
- Morning
- Voicemail
- Future
“Since my ductwork is kind of obsolete, he explained to me in layman's terms how extensive the changes to the old system would be and offered to connect me with other technicians who could convert and retrofit my AC.”
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Abend Services
- Technician
- Shower
- Water Heater
“In addition, they listened to every detail I provided, was told that they are scheduled out until Thursday but still managed to make a time window for our emergency the very next day (Monday).”
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At Your Service Heating and Cooling LLC
- Money
- Patient
- Fee
“) For the first time, my BGE bills have been $200 less for the last 2 month in 6 years I live here, and the house actually is cool when it's hot out and warm when it was cold.”
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Pipco Air Conditioning & Heating
- Maintenance
- Furnace
- Thermostat
“Once I called we were able to schedule at my preferred date and then installation was completed as promised and the equipment has been running great for almost 2 years now!”
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Warthen Co
- Oil
- Job
- Bill
“You could not ask for a men a friendlier War work environment place to go get fuel and have a good time while you're doing it they take care of each and individual customer like you are the one and only”
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Beltway Air Conditioning & Heating
- Diagnosed
- Work
- Responsive
“Beltway HVAC came out and did a complimentary inspection of our system since they were taking over accounts from a company that was closing its Maryland locations.”
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Ackerman Heating & Air Conditioning
- Home
- Hvac System
- Condo
“No other company could fix my problem of not getting enough cool air up stairs in the bedrooms for 14 years I has different companies try to fix the problem but Ackerman came in and within one day the problem was solved.”
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Future Tech Heating & Cooling Co.
- Furnace
- Second Opinion
- Responsive
“While other HVAC companies provided quotes ranging from $6-$10K, Scott detailed all the pros and cons of various brands and was the only one that also informed me the system could be repaired (for ~$800).”
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Bay Area Mechanical Services Inc.
- Call
- Priced
- Furnace
“Every time they come over, they are very transparent and keep me updated with exactly what they are doing and if any issues arise and how they fixed it.”
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Tario Hvac
- Home
- Property
- Hvac System
“What compelled me to write this now (should have done it awhile ago) is that I reached out to Jose today to ask about a vent grille that a contractor had taken off and didn't want to fix.”
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Supreme Service Today
- The Future
- Plumbing
- Explanation
“They walked us through each test, diagnosis, and stage of the repair and educated us so that we could make informed decisions about how to best resolve the problem without spending more money than necessary.”
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Rowbel Services
- Questions
- Wiring
- Room
“They covered the work area where the new pot light was to be put so that the drywall dust would not land on my computers (the light was being installed in a home office).”
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Complete Climate Services
- Morning
- Pricing
- Home
“He was very helpful explaining and fixing the issue with our A/C, explained our options without being pushy for us to upgrade our system or spend too much money.”
Why these companies made our list
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