About Us

A/1 Heating & Air Conditioning Inc. is committed to providing prompt and friendly customer service matched by none. We are one of the largest Carrier dealers in Carroll County. We have proudly provided quality service for the Westminster and surrounding areas since 1983. We specialize in  residential and light commercial installations, service and replacements. Our team of Factory-trained technicians and installers are backed with years of experience and are able to repair or replace all makes and models with 100% satisfaction guaranteed. All of the employees at A/1 Heating & Air Conditioning take pride in their work and are dedicated to provide the best possible service to you, the customer. It is our goal at A/1 Heating & Air Conditioning to give that personable home town attention to each and every customer, Because...

" A satisfied customer is without a doubt the "Best" advertisement our company invests in"   


  • Serving Carroll County and surrounding areas since 1983  
  • Free estimates on replacements  
  • 100% Satisfaction Guaranteed  
  • We service all makes  
  • Same day service

Contact Us

A1 Heating and Air Conditioning

406 C3 Lucabaugh Mill Rd. Westminster, Md. 21157

CLICK TO CALL 410-876-5909 410-857-4778


Monday - Friday: 7:00am - 4:30pm

Send Message


Pay with PayPal or a debit/credit card

heat pump, air conditioning, boiler, gas furnace, oil furnace, oil boiler, gas boiler, hvac, furnace, heat pump repair, air conditioning repair, oil boiler repair, gas boiler repair, gas furnace repair, oil furnace repair, humidifier, air cleaner, air duct zoning, carrolls best, outdoor wood boiler, backup, generator, outdoor wood furnace, ductless, carrier, rheem, ruud, trane, goodman, bryant, lennox, york, payne, ducane, armstrong, airtemp, american standard, burnham, mitsubishi, service, installation, install, replacement, uv treatment, carroll county, sales,  adams county, york county, baltimore county, frederick county, manchester, 21102, millers, lineboro, hampstead, 21074, westminster, 21157, 21158, mt airy, 21771, new windsor, 21776, eldersburg, 21784, taneytown, 21787, kemar, 21757, finksburg, 21048, woodbine, 21797, littlestown, 17340, hanover, 17331, sykesville, maryland, pennsylvania