Heating & Air Conditioning Experts with 28+ years of experience

Mon-Sat: 9:00am - 7:00pm

24h Emergency Service

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Call Today (410) 944-4810

Catonsville, MD 21228

Quality that is Guaranteed

Heating and Air Conditioning Comfort Specialist

Emergency Services


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(410) 944-4810

Our Story

A-Z Heating, A/C and Refrigeration Inc

Unlike the competition, we only fix what’s broke!

We pride ourselves on being a one stop shop that is able to meet all of our client’s needs. Our goal is to provide the highest quality design and installation services, on schedule, and on budget along with outstanding customer service.

We understand that time and cost are crucial and strive to go above and beyond our client’s expectations. We do not charge by the hour, instead we offer flat rate pricing. For our customer’s peace of mind, we also offer valuable money saving service and maintenance contracts. Please call for additional details.

Our company provides a full spectrum of work of all levels of complexity. Our team consists of licensed technicians, who have been in the industry for no less than 10 years. We have gained extensive experience while solving the most complex technical and organizational tasks, which allows us to provide you with the best service.

24 Hour Emergency Service

We can provide expert 24 hour Emergency Service available to you 365 days a year for all your Heating, ventilation, and air conditioning (HVAC) needs.

Call us now at (410) 944-4810. Follow the prompt for Emergency service.

25+ Years Experience

We have over 25 years experience in the heating, ventilation and air conditioning industry (HVAC). We believe in quality customer service.

We are here when you need us to service both your residential and commercial properties!


A/C Maintenance Savings!

$25 off

Save $25.00! May be applied to your next Service Call, A/C Maintenance or Repair.

Heating Maintenance Savings

$25 off

Save $25.00! May be applied to your next Service Call, Heating Maintenance or Repair.

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    Our Services

    A/C & Heating Installation

    We offer high quality installation of residential and commercial air conditioning with the use of professional equipment and fine materials, at a lower cost.

    Maintenance and Repair

    We provide a full range of repairing and maintenance of air conditioning systems, ventilation systems, light industrial and industrial split systems.

    Pre-season Preparation

    Air conditioning systems are regulated appliances, requiring expert maintenance to properly function at the best rate of energy consumption.

    Annual inspections

    An annual inspection allows a technician to identify dirty coils and burned out contactors before they cause long term damage to your system.

    Boiler Service

    This service encompasses repair, installation of gas hot water hydronic boilers, gas steam boilers and oil boilers.

    A/C & Heating Repair

    All of our licensed technicians provide 10+ years of experience on multiple air conditioning & heating systems and can provide service and repair for all makes and brands.


    A/C Repairs


    Heating Repairs


    Satisfied Customers

    Our Partners

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    Randallstown, Maryland

    A-Z Heating, A/C & Refrigeration came out to service my home and did a great job. They fix the problem that was done incorrectly by another company. I have them come out twice a year to service my home for the change of the weather. They were on time and even came out on an late call due to no heat, I highly recommend them to all of my family and friends. The technician even explained how to check to see if my furnace needed new filters.


    Bowie, MD

    We have used A-Z Heating A/C & Refrigeration for many years for heating and air conditioning. They set up appointments promptly, show up when they are supposed to, and do excellent work. I would highly recommend A-Z!

    Tips and Tricks


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    Preparing Your Home Before Vacation

    Ready for a vacation? Your home should be too! Careful planning can not only help protect your home and your belongings while you travel, but also provide your family with some energy savings to spend…


    Is a More Expensive HVAC Filter Better?

    HVAC Air Purifiers Whole-house air purifiers are becoming an increasingly popular component of the heating and cooling systems in many homes. Wondering why? Check out the benefits below! Fewer allergy symptoms. Unlike standard air filters,…