Top 10 24 Hour HVAC in Frederick, MD
Quick Answer
The best 24 hour hvac providers in Frederick, MD for 2026 include Smock Heating & Air (5), Markool Heating Cooling Plumbing (4.9), Frederick Air Inc (4.8).
Why 24-Hour Hvac Service Matters in Frederick, MD
Emergencies don't follow business hours. Whether it's a burst pipe at midnight or a furnace failure during a cold snap, having access to a reliable 24-hour hvac in Frederick, MD can prevent thousands of dollars in damage and keep your family safe.
💡 Quick Tips:
- Ask about after-hours surcharges upfront — some Frederick, MD companies charge flat rates even at night
- Save your top pick's number in your phone before an emergency happens
- Check if the company dispatches their own technicians or uses a call center
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Frederick Air Inc
3 King Ave, Frederick, MD 21701, USA
Licensed & InsuredTop Rated
Services: 24 Hour Hvac
2
Markool Heating Cooling Plumbing
5304C Kings Ct, Frederick, MD 21703, USA
Licensed & InsuredTop Rated
Services: 24 Hour Hvac
3
TriState Home Services
82A Wormans Mill Ct, Frederick, MD 21701, USA
Licensed & InsuredTop Rated
Services: 24 Hour Hvac
Sponsored
4
Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical
5744 Industry Ln Suite N, Frederick, MD 21704, USA
Licensed & Insured
Services: 24 Hour Hvac
5
Wenbrooke Services - Electrical, Plumbing, Heating and Air
4907 International Blvd #113, Frederick, MD 21703, USA
Licensed & Insured
Services: 24 Hour Hvac
6
Holtzople Heating, Air Conditioning & Electrical Services
16424 Old Frederick Rd, Emmitsburg, MD 21727, USA
Services: 24 Hour Hvac
7
United Air Temp
5305 Jefferson Pike Suite 5, Frederick, MD 21703, USA
Services: 24 Hour Hvac
Sponsored
8
Warner Service
217 Monroe Ave, Frederick, MD 21701, USA
Services: 24 Hour Hvac
9
Airtron Heating & Air Conditioning
5123 Pegasus Ct Suites K-N, Frederick, MD 21704, USA
Services: 24 Hour Hvac
10
Wenbrooke Services AC Repair, Plumbing, Heating and Electrician
617 W Patrick St Suite 220, Frederick, MD 21701, USA
Services: 24 Hour Hvac
How We Ranked These Frederick Pros
Our rankings are based on a weighted evaluation of five key factors:
- Licensing & Insurance — All listed businesses hold active state licenses verified through official databases.
- Customer Reviews — We aggregate ratings from Google, Yelp, and the BBB, weighting recency and review volume.
- Response Time — Companies offering same-day or 24/7 emergency service score higher.
- Pricing Transparency — Businesses who offer flat-rate pricing or free estimates rank above those with opaque billing.
- Experience & Longevity — Years serving the Frederick market and breadth of services factor into overall reliability.
Rankings are reviewed quarterly. Have a correction? Contact us.
Frequently Asked Questions
How much does 24 hour hvac cost in Frederick?
Pricing varies. Get 2-3 local quotes.