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121 Years In Business

Company Details

  • Verified Licenses


10500 Reisterstown Road
Owings Mills, MD 21117


  • Mon: Open 24 Hours
  • Tue: Open 24 Hours
  • Wed: Open 24 Hours
  • Thu: Open 24 Hours
  • Fri: Open 24 Hours
  • Sat: Open 24 Hours
  • Sun: Open 24 Hours
View All Details & Credentials


Service Details

    Areas of Expertise

    • Central A/C - Install / Repair
    • Electric / Gas / Oil Furnace: Install / Repair
    • Heat Pump - Install or Replace
    • Boiler or Radiator Heating System - Install / Repair
    View All Offerings and Cities Served

    Cost Information

    • Free Estimates
    • Warranty Offered
    • Credit Cards Accepted


    18 Verified Reviews
    • 5
    • 4
    • 3
    • 2
    • 1
    Showing 1-10 of 18 results
    1.0 Isaac H. Baltimore, MD

    We purchased a house that has a new HVAC system from Farnen and Dermer. Within 1 year of us moving in our AC had several massive issues that Farnen and Dermer refused to honor because *we were not the buyers of the system*. Aside from that we found out that due to their neglect when installing the HVAC they forgot to wrap and insulate it, leading to a leek and water damage. Avoid at all costs.

    1.0 A W. Parkville, MD

    Do NOT hire them for extended maintenance plan. When the AC GUY came out for the annual maintenance ... he was horrible. He was unfriendly, unprofessional.... as he was putting our AC back together, he dropped some screws. I handed them to him(he didnâ t pick them up) & he said they were NOT IMPORTANT. These are newer systems((a/c & furnace purchased thru them)). When I called the office & spoke to the OWNER, he said this was TRIVIAL. & we were wasting his time & admitted it was a new employee. HE was unfriendly & uncaring. SHOP ELSEWHERE for maintenance plan!!

    5.0 Jerry Y. Ellicott City, MD

    Ed and his team did a wonderful job, and the cost was reasonable. You can tell that they are honest and professional people.

    4.0 Kenneth F. Cockeysville, MD

    good experience

    5.0 Jill A. Cockeysville, MD

    Fantastic work! I am very pleased with the project and would certainly recommend them to anyone needing a complete HVAC system. Outstanding in all respects.

    4.5 Kathy T. Sparks Glencoe, MD

    5.0 Larry F. Phoenix, MD

    0.50 Patrick T. Parkville, MD

    I had one of their techs come out an evaluate my boiler which was showing low pressure. The tech spent about twenty minutes looking at my system and then quoted me nearly $7,000 for a new boiler and then charged me nearly $100 for coming out. I got a second opinion weeks later and it turned out the boiler just needed to be pressurized by turning a single knob. I would never call on them to evaluate a problem. It seems they are in the business of upsetting as opposed to repairing.

    5.0 Allan W. Parkville, MD

    BEST of the best!!! do not even shop around. Great service. Great team work! Great work ethics, these people REALLY CARE about their customers. they sent an entire team - 9 men & 6 trucks -  & installed a furnace/boiler & air conditioner in one day. I truly can not say enough about the  professionalism & integrity of this company!!!!!  they help make AMERICA GREAT AGAIN with their excellent amazing service!!


    Farnen & Dermer, Inc.
    Before & After Boiler
    Trane AC Installation
    High-Efficiency Furnace

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