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Ethen came early. Diagnosed the problem quickly and efficiently. Repaired the problem and checked the system thoroughly.
Joseph Murray
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Customer service and service people have been great 👍 would recommend them to anyone who needs Hvac work. Thank you for being so polite
Lori Marshall
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Was having problems with my AC attic unit, Hunter came out quick and was just really friendly more than anything. Waited for all my questions and comments (which i can talk), explained to me what was wrong, what he had to do and it didnt take long at all. Im glad I was recommended to give this place a call. Great with LENOX I was told. Reasonable pricing and like I said just a nice person to have work in/on your home. This is why you should support your local companies🤘🏼 I will give them a call again if i have issues.
Glen W
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The technician was very professional and respectful.
Mari Welch
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I couldn’t be happier with the service I received from this company. From start to finish, the entire experience was excellent. The installation team arrived exactly on time, worked efficiently, and clearly took pride in their craftsmanship.
They were professional, courteous, and respectful of my home throughout the installation. They kept the work area neat, cleaned up thoroughly before leaving, and took the time to answer my questions and make sure everything was working properly.
It’s refreshing to work with a company that values punctuality, quality workmanship, and outstanding customer service. I highly recommend them to anyone looking for a reliable HVAC company. Thank you for a job well done!
Famos523
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My dad had his system re done after 35 years, he had a couple people come out and from the start was very pleased with how G Cullum did things. It’s finished and he is so incredibly pleased. Any question he had got answered. They went above and beyond to work with him. He put a review on but couldn’t figure out how to write something so I did for him.
Morgan Kessler
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Wonderful job! Wished we would have done a new HVAC system sooner. They showed up on time, cleaned up after and they were professional the entire time. The pricing was competitive and they were upfront about the different options and how they would benefit us.
Krystal Nunez
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A very professional organization and the tech we had to do our fall maintenance was awesome.
Joyce Copenhaver
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My dad had his system re done after 35 years, he had a couple people come out and from the start was very pleased with how G Cullum did things. It’s finished and he is so incredibly pleased. Any question he had got answered. They went above and beyond to work with him. He put a review on but couldn’t figure out how to write something so I did for him.
Morgan Kessle
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Technician arrived early. Very pleasant/professional. Ran into a complication during the maintenance, but was very upfront with explanation of required work and cost. Very diligent with completing required work to meet his specifications.
John S.
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Very professional, responsive, and fairly priced. They show up on-time when scheduled. When on-site they don't rush, and are willing to answer any questions to better help the homeowner understand what is going on. They don't try to upsell parts/packages, and focus at solving the problem at hand.
Kyle N.
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Great Professionals! They took the time to actually diagnose the problem with my heater and had it fixed within 1 hour, turned out the gas valve needed replaced - they had the parts on the truck! Very honest, reliable, and professional! Another company, without hooking up any equipment misdiagnosed the problem. I will now always reach out now to Cullum Heating and Cooling!
William F.
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I got my AC and Heat system done for a lower price than other local companies. The installation process was great. The workers made sure to clean up after they were done every day at the end of the day. On the final day of installation, the team lead took his time to explain the importance of changing the filter and warranty coverage of the system. Overall, they did a great job, and I would definitely recommend.
Ana W.
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Michael F.
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Tanya B.
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Prompt, courteous and knowledgeable as always 😀
Jo Ann F.
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Prompt, courteous and knowledgeable as always 😀
Jo Ann F.
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Great company... Friendly, knowledgeable, quick service... diagnosed the problem quickly, kept me informed throughout. Would highly recommend.
Dave S.
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Quick, efficient, and knowledgeable tech got to the bottom of our issues right away. Great service with honest and transparent communication.
Patrick R.
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1000/10 would recommend G Cullum for any of your HVAC needs! Everyone that we have communicated with during the process has been amazing - professional, knowledgeable, and quick! We called to schedule an estimate and they fit us in within a week. When they came out, he was so thorough and explained what needed to be done. My husband had additional questions so called in to the office and the front staff was so sweet ! When the installation was being completed, the young men were respectful and hard working.
I don’t have any negative comments from this experience and will definitely be recommending this small town business to anyone and everyone
Stephanie G.
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Bryan D.
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Monica M.
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Chris B.
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Very professional and courteous. Very knowledgeable in design , maintenance, and installation. Trustworthy and very competitive in price without sacrificing quality.
Brad M.
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Cullum and his crew are awesome. They take their time to explain what’s going to happen at the time of the project, they’re very patient and double check that you like what they did at your home before they leave. I’ve never had an issue with any work they’ve ever done. The best HVAC company around.
Drew O.
Contact Details
MD HVACR 7354
Phone: (410) 658-9775
Email: gcullum@live.com
Address: 776 Joseph Biggs Memorial Hwy, Rising Sun, Maryland 21911
Emails will be answered during normal business hours, should you need immediate assistance, call the office.
Business Hours
24-hour emergency






