Air Conditioning & Heating

A Comprehensive Full Services Provider


Systems and Brands We Install

Traditional Ducted Systems

All-Air Systems of Maryland installs and services all residential brands

     We are not Brand Loyal

We are Loyal to You not a Brand

All-Air Systems does not advertise with or associate with one brand or manufacturer. We are not bound to sell any amount of a particular manufacturer’s system per year. Therefore, we are never under pressure to sell replacement jobs in order to meet a sales quota with a certain brand.

We are open to offer you any brand. Having the capacity to offer any brand gives us the versatility of providing you the exact match you need that meets your system requirements and your budget!

High SEER +efficiency

Let us:

Explain the benefits of installing a high efficiency system.

Remember, we can:

Install any brand system you like.

We will:

Help you choose the best solution for your home.

Bosch IDS 2.0 Heat Pump 20.5 SEER installations

Click Here – 11 year warranty!

We are an accredited

ABC Contractor

Standard SEER efficiency

Budget constraints?

We can set you up with a standard efficiency system that is budget friendly.

Without compromising quality!

We stand behind several budget friendly systems such as Daikin/Goodman, Run-True (Trane), and Rheem.

Systems with the Same Copeland Compressor and in most cases the same warranty as the more expensive Brands!


Goodman Heat Pump residential installation

Ductless Systems

Mini Splits

Great for older houses where metal ducting will not fit or to treat areas separated from the central system. 

Outdoor units take up a narrow footprint and are super quiet.

Ductless Outdoor Condensor installations

Wall Heaters

We install wall heaters for natural gas and propane. This is a perfect solution for treating cold spots in your house or for outbuildings instead of installing larger more expensive central systems.

Rinnai wall heater installations

Wall heater installed at the location of your choosing. Built in pans to add water help humidify the air.

Rinnai wall heater direct through wall venting

The venting installed directly through the wall and terminated with an attractive cap.

Automatic Home Backup Generator

All-Air Systems installs Automatic Home Backup Generators too. 

How Does an Automatic Home Backup Generator Work?

The generator automatically detects a power outage and delivers backup power to your home within seconds. You’ll have peace of mind knowing that you’re covered – the generator will keep your power running for as long as the power is out – whether that’s for two hours or two weeks.

Watch How it works


We also install accessory devices for your heating and air conditioning system.

Humidifier installations
Digital and Programmable thermostat installs
IAQ Air Quality Installations

Start your project today

Let us earn your trust

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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.

Our team works diligently every day to provide a clean and comfortable environment for our customers, therefore our operations remain largely unchanged. 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

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