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Claim This BusinessAbout ASC HVAC
ASC HVAC operates from Glenwood, Maryland, delivering residential and commercial heating and cooling solutions across Howard County and surrounding communities including Montgomery, Frederick, Carroll, and Prince George's counties. The company maintains 24-hour availability Monday through Friday, providing round-the-clock service for emergency repairs alongside scheduled installations and preventive maintenance. With a 4.7-star average rating drawn from 13 client reviews, the contractor has built a documented track record serving both homeowners and business property managers throughout central Maryland.
The business distinguishes itself through specialized indoor air quality offerings, particularly the iWave whole-house air purification system that requires no filter replacements or ongoing maintenance. Their service portfolio encompasses traditional split systems, heat pumps, and ductless mini-split configurations alongside custom ductwork design and fabrication. As a family-owned enterprise established in 1989, the company emphasizes straightforward pricing and transparent recommendations, reviewers consistently note that technicians advise against unnecessary replacements and suggest cost-effective solutions over high-pressure sales tactics.
Customer testimonials highlight specific service scenarios demonstrating responsive technical support. One reviewer describes calling on a sweltering Saturday when their air conditioning failed catastrophically; the dispatch team arrived the following day, diagnosing and repairing the issue in under forty minutes. Another review recounts a same-day summon during an approaching winter storm where a technician reached the property within thirty minutes and resolved a heat pump failure caused by a blown fuse. Multiple reviewers specifically commend individual technicians, Dan, Ryan, and Danny, for rapid response times, professional demeanor, and thorough system inspections performed during each service call.
What Customers Say
Eight of thirteen reviewers award five-star ratings and reference specific positive outcomes, including same-day emergency arrivals during extreme weather events and diagnostic speeds under forty minutes. Three reviewers explicitly name individual technicians, Mark, Ryan, Dan, or Danny, and praise their communication and honest assessment style. Pricing transparency surfaces repeatedly in favorable reviews, with clients noting competitive bids against larger competitors and technician recommendations to postpone unnecessary replacements.
Working Hours
| Sunday | Closed |
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| ThursdayToday | Open 24 hours |
| Friday | Open 24 hours |
| Saturday | Closed |
Services
Air Conditioning Repair & Installation
Full AC diagnostics, repair, and new system installation for residential and commercial properties throughout their service region.
Heating System Services
Furnace repair, replacement, heat pump installation, and heating system maintenance.
Ductless Mini-Split Systems
Installation and servicing of ductless mini-split configurations for zoned heating and cooling.
Ductwork Design & Fabrication
Custom ductwork design, installation, and modification for new construction and retrofit projects.
iWave Air Purification
Whole-house static air purification installation targeting viruses, allergens, mold, and indoor pollutants.
Preventive Maintenance Plans
Scheduled maintenance agreements for residential and commercial HVAC systems to extend equipment lifespan.