Generations of Reliable Service


Farnen & Dermer Inc. has been proudly serving Baltimore, MD and the surrounding areas for 5 generations. Originally established in 1902 by Leon Dermer, our business got its start in the Pimlico area.

As a family-owned and operated business, Leon’s son Harold joined the business and then passed it along to his oldest son, Frank. Today, Frank’s sons, Jay and Ed run the business with the same tradition of excellence originated by their great grandfather. The newest generation of Dermers is now in the business, as Ed’s son Zach now helps runs the business with his father and uncle.

We truly believe that high-quality service starts with factory-trained technicians who are qualified. On top of that, our entire team will treat you with friendly and respectful customer service.


Making home improvement affordable


After being in business for over 100 years, we’re proud to offer you the most experienced solutions in air conditioning, heating, and plumbing. Our main goal is to keep your home comfortable for your family, while decreasing your electric bill, and helping you avoid costly repairs.

If you want to purchase a new appliance, we can send a sales professional directly to your home to give you trustworthy recommendations.

We understand the importance of budgeting, which is why we offer financing with approved credit options on any newly installed Trane system. In addition, you can get a 5-year labor warranty when you purchase a maintenance program on your new product.