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Farnen & DermerHVAC contractor in Owings Mills, MD

Farnen & Dermer is an HVAC contractor at 10500 Reisterstown Rd, Owings Mills, MD 21117, ranked #2 of 569 HVAC contractors in Owings Mills and rated 4.8 from 931 Google reviews. Open 24 hours a day, 7 days a week.

Owings Mills, MDUpdated 0 paid placements in any rankingHow we rank

Call (410) 367-7777Website ↗

Key facts

Key facts about Farnen & Dermer
Address10500 Reisterstown Rd, Owings Mills, MD 21117Get directions
Phone(410) 367-7777
Websitefarnendermer.com
HoursOpen 24 hours, 7 days a week
Google rating4.8 from 931 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category

Service area

Serves Owings Mills and 11 towns within 25 miles: Garrison, Randallstown, Reisterstown, Pikesville, Milford Mill, Lochearn, Mays Chapel, Woodlawn, Lutherville, Cockeysville and Timonium.

Based in Owings Mills, MDView on map

Opening hours

Opening hours for Farnen & Dermer
DayHours
MondayOpen 24 hours
TuesdayOpen 24 hours
WednesdayOpen 24 hours
ThursdayOpen 24 hours
FridayOpen 24 hours
SaturdayOpen 24 hours
SundayOpen 24 hours
  • Open 24/7
  • Open evenings — no
  • Open Saturdays
  • Open Sundays
  • Emergency service

Typical heating and cooling prices

Typical heating and cooling prices
JobLowTypicalHigh
AC replacementPer system, installed (unit plus labor); typical range of customer-reported jobs. US national range$3,887$5,978$8,073
Furnace replacementPer system, installed; typical range of customer-reported jobs. US national range$2,823$4,814$6,896

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

Compare nearby HVAC contractors

Farnen & Dermer compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
Farnen & Dermer (this business)—644.8 (931)—YesYes
Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical#1644.8 (4,514)—YesYes6.4 mi
Triple E#3634.9 (469)—YesYes3.2 mi
Michael & Son Services#4624.7 (8,039)—YesYes15.3 mi

See all 569 ranked HVAC contractors in Owings Mills

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

4.8from 931 Google reviews

Hired Farnen & Dermer? Write a review

Questions about Farnen & Dermer

How is Farnen & Dermer ranked in Owings Mills?

Farnen & Dermer is ranked #2 of 569 HVAC contractors in Owings Mills by CR Score, with 64 out of 100 as of October 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity, claimed profile, partnered and ContractorsRanked reviews. No business can pay to change its rank.

What are Farnen & Dermer’s hours?

Farnen & Dermer is open 24 hours a day, 7 days a week. Its listed hours are Open 24 hours, 7 days a week. On Saturdays it is open Open 24 hours, and on Sundays Open 24 hours. Hours come from the business listing; holiday hours may differ.

What areas does Farnen & Dermer serve?

Serves Owings Mills and 11 towns within 25 miles: Garrison, Randallstown, Reisterstown, Pikesville, Milford Mill, Lochearn, Mays Chapel, Woodlawn, Lutherville, Cockeysville and Timonium. The list is based on the business's location and the usual service radius for heating and cooling. Confirm your address is covered when you call.

What do Google reviews say about Farnen & Dermer?

Farnen & Dermer has a rating of 4.8 from 931 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact Farnen & Dermer?

Call Farnen & Dermer on (410) 367-7777. The business is at 10500 Reisterstown Rd, Owings Mills, MD 21117. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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