All-Air Systems of Maryland Residential HVAC

We Specialize in Residential Systems

(410) – 877 – 6100

* Heat Pumps  &  Furnaces *

* Boilers  &  Water Heaters (including tankless) *

* Automatic Home Backup Generators *

> New Installations  &  Changeouts <

> Ductwork Design & Installation <

Service Calls – 24/7

Preventative Maintenance




We are located in Baltimore County but we proudly serve a large geographic area including:

Howard & Carroll County

Harford & Anne Arundel County

Southeastern Pennsylvania

All-Air Systems of Maryland is a Rinnai Pro
All-Air Systems of Maryland is on Angie's List
All-Air Systems of Maryland is Screened and Approved by HomeAdvisor





   At All-Air Systems, we provide a one-stop shop for your air conditioning and heating needs.

  We are experienced and trained in all Residential systems.  We offer both installation and service on all brands of equipment.

  We also understand what it takes to operate a service company that can offer the highest quality of craftmanship, professionalism, honesty, and exceptional customer service for the best value to you.

  We want to build long lasting relationships with customers and make a positive impact on our community.

  Most importantly, we believe that no job, repair, or service is complete unless our customer is satisfied with the outcome.


We are so confident in our services that we offer a 100% SATISFACTION GUARANTEE!!

Equipment We Service

Heat Pumps
Ductless Splits
Gas Furnaces

Our Services

New Installations & Replacements

Standard or High Efficiency. We install traditional split heat pumps, furnaces, and boilers as well as ductless mini split and VRV systems, such as Mitsubishi, Daikin, and LG. 

Service and Repair

All Residential brands and all systems. Heat pumps, air conditioning, furnaces, boilers, etc. We handle small repairs like electrical components and fans and major parts replacements like heat exchangers, compressors, and pumps.

Preventative Maintenance

We recommend maintenance 1 to 2 times a year, depending on the age, type, and warranty requirements of your heating and air conditioning equipment.


We also install High Efficiency Systems

20 SEER to 41 EER



Examples of Brands We Service

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We are OPEN for business but PLEASE READ: Coronavirus Announcement

Coronavirus Update

Dear All-Air Systems Customer,

The health of our customers and our team are our top priority. The recent spread of the Coronavirus (COVID-19) continues to disrupt many facets of our lives and has caused many changes in the way businesses operate.

Our team works diligently every day to provide a clean and comfortable environment for our customers, therefore our operations remain largely unchanged. With the heightened threat of COVID-19, we are requiring our employees to regularly wash hands and use hand sanitizer. Good health and safety are not new concepts to All-Air Systems. The only change is the frequency in which we wash and disinfect to ensure we are minimizing the potential for the spread of the virus.

All our dedicated team members have been instructed to monitor their own health very closely. If a team member is showing any symptoms of any illness, they have been advised to seek medical attention and treatment and not to report to work until their symptoms have resolved.

If you fear you have been exposed to COVID-19 or are concerned about your personal health and have an upcoming appointment, please let us know. You may reach us at our office at 410-877-6100, via email at or through our website at

Lastly, we are unsure of the long term impact to the global supply chain due to the COVID-19 outbreak. As of today, we are not experiencing any product or equipment shortages. We will work directly with our manufacturers and distributors and will notify our customers if potential shortages become apparent.

As we approach our busy season we will continue to work diligently to provide the quality of service to which you have grown accustomed. Rest assured you can count on us for all of your HVAC service and replacement needs.

Wishing you the best of health!

Andrew Knicley
All-Air Systems