Markool Heating Cooling Plumbing
Markool Heating Cooling Plumbing is a HVAC provider serving Frederick, MD. Rated 4.9★ with 556 Google reviews. See services, review signals, and request a quote.
HVACFrederick, MD
On this page
Company overview
- TradeHVAC
- Service areaFrederick, MD
- Google rating4.9★ (556 reviews)
- Phone(301) 732-4244
- Address5304C Kings Ct, Frederick, MD 21703, USA
Services offered
- installation
- repair
- emergency
Photos
Photos from Markool Heating Cooling Plumbing
What customers say
“I did not think companies like Markool existed any longer. When it comes to honesty , dedication and pride they have it all. Zack showed up the day before to look and see what the issue was. After spe…”
“Overall very happy with the system. They were flexible with the schedule as I had some delays due to permits. They worked with me and other contractors to ensure everything was set up to my satisf…”
“Guys were very pleasant. Hunter definitely knew what he was doing. Explained the problem he found and give me options. Definitely would recommend them to people. Very much pleased with there Service.…”
“I personally had a great experience. It was 10 degrees out and my house was not keeping warm. I called the company and they gave me a few options to troubleshoot the issues without charging me. I felt…”
Key highlights
Strengths
- Highly rated (4.9★ average)
- Large review volume (556 reviews)
Things to ask
- Confirm availability for your area and timeline
- Ask about warranty terms on parts and labor
- Request a written estimate before work begins
- Ask about payment plans or financing
Explore nearby research
Frequently Asked Questions
What services does Markool Heating Cooling Plumbing offer?
Markool Heating Cooling Plumbing provides: installation, repair, emergency. They serve residential and commercial customers in Frederick, MD.
What is Markool Heating Cooling Plumbing's rating?
Markool Heating Cooling Plumbing has a 4.9 out of 5 star rating based on 556 Google reviews.
Is this company licensed in Maryland?
All listed providers have a verified Maryland contractor license at time of publication. You can verify on the Maryland Department of Labor — Board of Heating, Ventilation, Air-Conditioning, and Refrigeration Contractors (HVACR Board) lookup at https://www.dllr.state.md.us/cgi-bin/ElectronicLicensing/OP_Search/OP_search.cgi?calling_app=HVAC.
Does Markool Heating Cooling Plumbing offer emergency service?
Contact them directly to ask about emergency availability and after-hours service.
How do I request a quote?
Use the CTA below to submit your ZIP. You can message this company alongside two or three other local pros for easy comparison.
Licensing verified 2026-04-23. Reviews refreshed 2026-04-23.
Licensing data: Maryland Department of Labor — Board of Heating, Ventilation, Air-Conditioning, and Refrigeration Contractors (HVACR Board) · Company data: verified business records + Google Business profile
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