Need Help Now?

Call Our 24 Hour Emergency HVAC Service Line

Need Help Now?

Call our 24 hour Emergency Line to schedule an immediate appointment.

Send Us A Message

This field is for validation purposes and should be left unchanged.

HVAC Services MD & PA

MD HVAC Services
1117 Harkins Rd
Pylesville, MD 21132
Call MD – (410) 896-7480

PA HVAC Services
2515 Delta Rd,
Brogue, PA 17309
Call PA – (717) 927-9802

HVAC Service Hours
Open Mon-Fri:
7:30 – 6:00

See Why Our Customers Love Us

Old Line has been to our house a few times, most recently they discovered we had duct issues. The repair was faster than they originally thought and now not even 24hrs later it is feeling much better in our home. Can’t say enough good things.

My wife contacted them. They came out very professional and we decided on a new unit. Price was very fair. We already had estimates. One week later unit was installed and now very comfortable. Excellent communication, professional and fair prices.


Old Line came for a leak in my water heater. Not only was the fix cleanly done, but he explained what he was doing every step of the way. Really appreciated the honest service and pricing – would strongly recommend!