⭐⭐⭐⭐⭐
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.
⭐⭐⭐⭐⭐
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.
⭐⭐⭐⭐⭐
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.
⭐⭐⭐⭐⭐
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.
⭐⭐⭐⭐⭐
Michael F.
⭐⭐⭐⭐⭐
Tanya B.
⭐⭐⭐⭐⭐
Prompt, courteous and knowledgeable as always 😀
Jo Ann F.
⭐⭐⭐⭐⭐
Prompt, courteous and knowledgeable as always 😀
Jo Ann F.
⭐⭐⭐⭐⭐
Great company... Friendly, knowledgeable, quick service... diagnosed the problem quickly, kept me informed throughout. Would highly recommend.
Dave S.
⭐⭐⭐⭐⭐
Quick, efficient, and knowledgeable tech got to the bottom of our issues right away. Great service with honest and transparent communication.
Patrick R.
⭐⭐⭐⭐⭐
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.
⭐⭐⭐⭐⭐
Bryan D.
⭐⭐⭐⭐⭐
Monica M.
⭐⭐⭐⭐⭐
Chris B.
⭐⭐⭐⭐⭐
Excellent service as always
Trisha F.
⭐⭐⭐⭐⭐
Very professional and courteous. Very knowledgeable in design , maintenance, and installation. Trustworthy and very competitive in price without sacrificing quality.
Brad M.
⭐⭐⭐⭐⭐
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.
⭐⭐⭐⭐⭐
Great team to work with here. They went way beyond what was required when working with us and repairing our system. We appreciate it. Without a doubt we will use them for our future needs and we recommend them to anyone for hvac needs.
David M.
⭐⭐⭐⭐⭐
Quick scheduling, quick service, and all at a fair price. Would recommend.
Matthew D.
⭐⭐⭐⭐⭐
Reasonable price
Gary was beyond thorough, and so helpful! Very knowledgeable and kind. Very thankful for him and his skills.
Katie F.
⭐⭐⭐⭐⭐
Jeff G.
⭐⭐⭐⭐⭐
Extremely easy to schedule with. Very professional and fast service.
Robert T.
Coming soon…
Looking for trusted HVAC near you? Call (410) 658-9775 for expert heating and cooling services across Rising Sun, MD, and nearby areas.
Contact Details
MD HVACR 7354
Phone: (410) 658-9775
Email: gcullum@live.com
Address: 776 Joseph Biggs Memorial Hwy, Rising Sun, Maryland 21911
Business Hours
24-hour emergency






