Asc Hvac
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Asc Hvac
Existing unit maintenance, new installations, retrofittings, complete design and planning, and more. High-quality HVAC products maintained and installed by dependable HVAC experts is what ASC HVAC is all about. For over thirty years we've been family-owned, taking care of both commercial and residential HVAC systems in Maryland with a personal touch.

We take the time to understand your needs, your timeframe, and your budget to deliver the proper HVAC service in Howard County to keep you up and running and in good comfort. With a combination of knowledge, experience, and integrity, we are the go-to company for all of our Glenwood, Howard County neighbors and beyond.

Each ASC HVAC crew is made up of knowledgeable and experienced HVAC contractors who are able to help assess, install, or maintain your current or new HVAC unit. Planning, design, and preventive maintenance are all part of the package when you hire an ASC HVAC technician. We've continued to build our company based on reliable jobs, dependable products, and thorough communication.
Services
ASC HVAC began in 1989 and is a family-owned business. We are based in Howard County, Maryland, but provide services to both commercial and residential HVAC units throughout Maryland. Fully insured, highly rated, and bursting with over thirty years of knowledge and experience, we consider ourselves one of the best HVAC companies in the Maryland area.
ASC HVAC offers the iWave Air Purifier, a residential air purifier to give better quality air to you and your family. Suffering from allergies, susceptible to viruses, tired of being plagued by strong odors, and want to rid your home of dust particles floating through sunbeams? The iWave Air Purifier handles it all.
From commercial properties to residential homes, ASC HVAC handles all AC repairs and AC installations in Howard County, MD and surrounding counties. Stay comfortable, stay within budget, and stay cool. Nothing is worse than a muggy Maryland day - whether it hits in Spring, Summer, or unexpectedly in the Fall.
Providing heating repair services, heater installations, furnace repairs, boiler maintenance, heat pump services, and more in Maryland. Staying warm in the cold Maryland months is no joke - temperatures begin fluctuating near the end of Summer and are inconsistent until late Spring, in most cases.
Keep the heat on, the A/C flowing, and your home in total comfort no matter the weather with ASC HVAC. Our experienced HVAC technicians are available to help with existing HVAC maintenance and repairs, retrofittings, new installations that call for some creative planning and design, and seasonal check-ups.
Reviews (8)
Grady P.
Grady P.
Oct 05, 2020
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Danny saved us on a 90+ degree day when of course our AC stopped. Not only did he solve our problem but checked the unit to make sure that was the only problem. We were going out of town a couple days later and we wouldn't have gone if the problem hadn't been solved. Really appreciate the service and professional manner. He wore a mask despite the heat.
Mark Eh
Mark Eh
Nov 04, 2019
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Woke up on a Sunday morning and furnace was not working. Service call guy explains control card and igniter needs to be replaced on 23 yr old unit. We go with furnace replacement. Of course that service provider was hoping for a spot (pressured) decision that was $2500 more than we paid). Do your homework folks! Frantically start calling around and touch base with friend of the family that recommends ASC. Called Mark (owner) and he came over first thing Monday morning. I also got three other estimates. Mark was most straight up, straight forward, did not over sell, kept it simple, convinced us
Ashbyk
Ashbyk
Nov 24, 2018
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I’ve used ASC a total of three times now. One of which was a total system replacement. Quality service, great prices, and good people.
Jenn Jones
Jenn Jones
Nov 15, 2018
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Mark has been wonderful and I recommend him to all my family and friends. Very reliable and we have been using him for over 30 years.
Corinne Zaccagnini
Corinne Zaccagnini
Dec 28, 2017
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We have used them for years and never had a bad experience. Their prices are much more reasonable than the bigger guys. Not sure why anyone would rate them lower than 5. I’ve had a system completely replaced and they were professional and MUCH less than the other bids I got.
Gary K.
Gary K.
Jun 30, 2017
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My AC went out on a Monday afternoon. I contacted Mark at ASC and actually reached him after hours that evening. I went through my home warranty. Mark had a tech at my house on Tuesday morning! The technician was extremely knowledgeable and very customer service oriented. The compressor was burned up (I knew it was going out). Mark contacted the home warranty company to get the replacement compressor. The only delay was waiting for the part to arrive from the warranty company. The communication and service I received was phenomenal! Mark was in constant communication with me and had the
Kelly Hildebrand
Kelly Hildebrand
Nov 11, 2016
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Dan was here within 30 minutes from when I called, and fixed my heat pump in less than 30 minutes. It was just a bad fuse, so I got lucky there. Very friendly, professional and a fast response with a pending blizzard a day away. I highly recommend!
Tom Barry
Tom Barry
Oct 29, 2015
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Extremely unprofessional and unreliable. Don't waste your time/money with these guys. They set an appointment for a Friday afternoon and didn't call when they missed the scheduled time, so I call them to check on the status. They said they were running a little late, but would be there. A half hour later, I called back to see where they were and was told it would be at least another hour, maybe more. I said that I couldn't keep waiting that long because I had a conflicting appointment...They said they could come on Saturday, but I'd have to pay the emergency service fee. I told them that I'd prefer