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Cornerstone Heating & Air Conditioning, Inc.HVAC contractor in Thurmont, MD

Cornerstone Heating & Air Conditioning, Inc. is an HVAC contractor in Thurmont, MD, ranked #47 of 166 HVAC contractors in Thurmont and rated 4.3 from 18 Google reviews. Open Monday to Saturday.

Thurmont, MDUpdated 0 paid placements in any rankingHow we rank

Call (240) 674-3100Website ↗

Key facts

Key facts about Cornerstone Heating & Air Conditioning, Inc.
Phone(240) 674-3100
Websitecornerstone-hvac.com
HoursMonday to Friday: 9 AM – 5 PM; Saturday: 9 AM – 1 PM
Google rating4.3 from 18 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category

Service area

Serves Thurmont and 11 towns within 25 miles: Robinwood, Hagerstown, Fountainhead-Orchard Hills, Halfway, Walkersville, Frederick, Ballenger Creek, Spring Ridge, Taneytown, Brunswick and Linganore.

Based in Thurmont, MDView on map

Opening hours

Opening hours for Cornerstone Heating & Air Conditioning, Inc.
DayHours
Monday9 AM – 5 PM
Tuesday9 AM – 5 PM
Wednesday9 AM – 5 PM
Thursday9 AM – 5 PM
Friday9 AM – 5 PM
Saturday9 AM – 1 PM
SundayClosed
  • Open evenings — no
  • Open Saturdays
  • Open Sundays — no

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

Cornerstone Heating & Air Conditioning, Inc. compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
Cornerstone Heating & Air Conditioning, Inc. (this business)—554.3 (18)—YesNo
Aero Energy#45554.9 (224)—NoNo16.8 mi
Mid-Atlantic Comfort Specialists#46554.5 (48)—YesYes20.1 mi
Right A Way Heating & Cooling#48555.0 (3)—YesYes16.1 mi

See all 166 ranked HVAC contractors in Thurmont

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

4.3from 18 Google reviews

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Questions about Cornerstone Heating & Air Conditioning, Inc.

How is Cornerstone Heating & Air Conditioning, Inc. ranked in Thurmont?

Cornerstone Heating & Air Conditioning, Inc. is ranked #47 of 166 HVAC contractors in Thurmont by CR Score, with 55 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 Cornerstone Heating & Air Conditioning, Inc.’s hours?

Cornerstone Heating & Air Conditioning, Inc. is open Monday to Saturday. Its listed hours are Monday to Friday, 9 AM – 5 PM; Saturday, 9 AM – 1 PM. On Saturdays it is open 9 AM to 1 PM and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does Cornerstone Heating & Air Conditioning, Inc. serve?

Serves Thurmont and 11 towns within 25 miles: Robinwood, Hagerstown, Fountainhead-Orchard Hills, Halfway, Walkersville, Frederick, Ballenger Creek, Spring Ridge, Taneytown, Brunswick and Linganore. 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 Cornerstone Heating & Air Conditioning, Inc.?

Cornerstone Heating & Air Conditioning, Inc. has a rating of 4.3 from 18 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 Cornerstone Heating & Air Conditioning, Inc.?

Call Cornerstone Heating & Air Conditioning, Inc. on (240) 674-3100. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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Claiming is free. Correct your hours, trades and service area. The CR Score is recalculated from corrected data; payment never changes it.

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