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Thomas D. Stern
Air Experts Inc.

High-Quality & Trusted HVAC Service For Over 30 Years


For over 30 years, Thomas D. Stern Air Experts Inc. has provided families in the Baltimore-Washington area with high-quality, reliable, and cost-effective heating and air conditioning services. Our family-owned company, established in 1993, offers expert service across multiple counties in Maryland, tackling jobs of all sizes with a commitment to quality and customer satisfaction. We accept all major credit cards, checks, and financing through Wisetack. Now offering interest-free financing options of up to 24 months.


Our Family

Superior Services

Customers are raving about our services from same-day service calls to fast installations/repairs.

Interested in a specific service?

Give us a call at 410-984-2655 and we'd be happy to help.  

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Affordable, thorough seasonal maintenances with pre-season discounts for spring and fall.

Never want to miss a maintenance and get 10% off parts in addition to other exclusive benefits? Sign up for a Maintenance Contract and be ready for every season!

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Residential Installations

Custom Ductwork

  • Air Conditioners

  • Boilers

  • Duct Systems

  • Furnaces (Gas & Oil)

  • Heat Pumps

  • Humidifiers

  • iWave-Rs

  • Mini-Splits

  • Package Units

  • Water Heaters

  • Water Source Heat Pumps

  • Airtemp

  • Aprilaire

  • Bradford White

  • Bryant 

  • Carrier

  • Climate Master

  • Heat Controller

  • Rheem

  • Many more!

Custom ductwork is a breeze in our custom design shop led by Master HVAC & Gas Fitter, Thomas D. Stern.


We can build a new duct system in your attic or redesign your current ductwork to increase airflow. 


Financing in Seconds

Fit any project into your budget with Wisetack. Easy to use and with countless options including 0% for up to 24 months.

Blue Skies
"Darren was prompt, efficient, thoughtful, and thorough. He was also personable and had a great sense of humor. In addition, the woman who answered the phone is terrific. I'm sorry we don't know her name, but her friendliness, kindness and demeanor were the reasons we made the appointment with Thomas Stern in the first place. We look forward to continuing business." 

Emily P. 


Certified Professionals

Anne Arundel County

Baltimore County

Carroll County

Frederick County

Howard County

Master Gas Fitter

Montgomery County

Prince George's County

State of Maryland - 2365



What areas does Air Experts Inc. work in?

The greater Baltimore-Washington area. Counties include Anne Arundel, Baltimore (county), Carroll, Frederick, Howard, Montgomery, and Prince George's. We also service a specific area of D.C. right over the Maryland line, mostly near American University, by Chevy Chase. If you have any questions regarding our service area, please don't hesitate to call us and ask.

How often should I have my systems maintenance?

Twice a year, ideally in the spring and fall. Please call us to schedule your seasonal maintenances and we'll be happy to set up an appointment. Seasonal Maintenances will protect the performance of your equipment and prevent breakdowns. Keep your equipment happy, keep your home comfortable.

How often should I change my filters?

Every 30-60 days depending on the contamination levels of the filters. If you're unsure, you can always give us a call.

My system is leaking water, what do I do?

Turn the system off because water can cause damage to the system, floors, or ceilings. Then call us immediately and we'll set up an appointment as soon as possible.

Do you have same-day availability?

Most often, yes. To avoid longer wait times, avoid peak times of the seasons like the first extremely hot or cold days of summer and winter. Make sure to turn on your systems before temperatures rise or fall drastically to get ahead of the rush. Make sure to schedule your seasonal maintenances in the spring and fall to avoid long wait times and keep your home comfortable.

Do you offer weekend or emergency service?

Yes. Costs for emergency and/or weekend services do increase, so if possible try to schedule appointments during the week (Monday-Friday) or ahead of seasonal rushes in the summer and winter.


7159 Harlan Ln

Sykesville MD 21784






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