Serving the Entire Baltimore Area, Howard and Carroll Counties Since 1902.

"Making your family's comfort our family's business since 1902"

Farnen & Dermer Inc. - Logo Facebook GooglePlus Twitter Pinterest Instagram LOGO-1

Providing efficient air conditioning repairs, installation, and maintenance right at the day of appointment. Get your unit running quickly and at a fair price.

Keep your home comfortable with help from our trained technicians. Featuring Trane products, we offer you financing with approved credit options on the purchase of new heating units. We can also do same day repairs or emergency repairs

Old system die during the peak of Summer or Winter? We'll have your new high-efficiency system installed next day! We have a fully stocked warehouse of air conditioners and heaters ready to keep your family cool in the Summer and warm in the Winter!

Whether you're dealing with a plumbing catastrophe or you're just doing a bathroom remodel, we'll get the hot water flowing again today!

Call us today for a

FREE estimate

on replacement heating and cooling systems.

Why choose Farnen & Dermer

Same Day Service Available

  • In business since 1902

  • Experienced and professional factory-trained technicians


  • 100% Satisfaction guaranteed by our locally-owned and operated business


  • Same-day service


  • Straight forward pricing! Pay the price you are quoted, no surprise fee.

Special financing available with approved credit

"Next Day" Installations

Emergency Water Heater Repairs &


Welcome to Farnen & Dermer, Inc. For more than a century, we have provided residential and commercial electrical services, plumbing repair service, and HVAC service in Baltimore, MD, Owings Mills, MD, and throughout Maryland. Whether you are searching for residential electrical services, commercial heating systems, or water heater installation, we deliver quality work and honest service.


Our local, family-owned and operated business provides reliable residential and commercial air conditioning, heating, plumbing, and electrical repair service for homeowners and light commercial clients. Our company is fully licensed and insured, and our plumbers, electrical, and HVAC technicians are factory trained and experienced to ensure superior service for every client.


We help families and businesses increase comfort and save money on energy bills with energy efficient heating and cooling installation. Our technicians install commercial and residential heating systems, provide heating and air conditioning repair for your existing system, and maintenance of residential air conditioning and commercial HVAC systems.


Our professional plumbers offer a full range of commercial and residential plumbing services for jobs of all sizes. We provide installation and repair services that include faucets, sinks, plumbing fixtures, leak detection, garbage disposal repair, gas water heater installation, drain cleaning services, and more.


When you need home electrical repair, commercial plumbing, or HVAC repair in and around Baltimore, MD or Owings Mills, MD, call Farnen Dermer, Inc. for industry leading service at reasonable prices. Please browse our website to read more about our service and contact us by telephone at 410-902-0020 for prompt service at your home or business.

farnen-and-dermer-inc-bbb farnen-and-dermer-inc-trane images 02 flame snowflake water heater farnen-and-dermer-inc-trane FinancingOptions_LearnMore_300x250_C