Southern Maryland’s Heating and Air Conditioning Company:

Capps Mechanical, LLC is a licensed and insured mechanical union contractor located in Southern Maryland. We are a family owned and operated limited liability corporation proudly serving Maryland, Washington, D.C., and Virginia. We specialize in commercial and residential heating, ventilation, and air conditioning.



Capps Mechanical, LLC

Our mission is to provide each client with quality products and a high-level of service that we would expect in our home or business.  We service the Maryland, Washington, D.C., and Virginia areas, specializing in commercial and residential heating, ventilation, and air conditioning. You’ll find Capps Mechanical, LLC to be a dependable heating and air conditioning company that will pay close attention to every detail of your job, whether it’s installing a new central air conditioner, repairing your furnace, or providing regularly scheduled maintenance on your commercial or residential heat pump.

The Southern Maryland HVAC Company that cares about our First Responders and Military.

If you are a member of the military or first responder, that lives or owns a business in Charles, St. Mary’s or Calvert County, Maryland, you’ll be in safe hands when you trust your HVAC needs to Capps Mechanical, LLC. We are the HVAC Company of Southern Maryland that takes special care to deliver budget-concise estimates to those that take care of our community.

It brings us great satisfaction to know that through our professional HVAC services, we can make a difference by bringing greater comfort to our military and first responder’s lives. Please contact us to inquire about first responder and military discounts.

MD: 19793
VA: 2705158957
DC: RM902345


A properly maintained system is the only way to ensure that you are running at the equipment-designed efficiency rating.  We can offer you a maintenance contract to suit your budget or just take care of your equipment as needed.


Sometimes no matter how well a system is maintained, over time mechanical equipment fails. The key to replacing system components is that they are done the correct way so they last as long or longer than the original. No matter whether it is a refrigeration system or water system, there is only one way we do repairs, and it’s the right way.


We work with companies to install an affordable control system that works for your needs. We can design and install a stand alone control system at half the cost of a building automation system that does everything a higher cost system would do. No matter how big or small the control system, we can take care of it.


Our motto is “start strong but finish stronger.” To that end, we offer skilled journeymen and a project management team that can retrofit your building or can build one from the ground up. Our commissioning team will see you through to the end of your project

Heating & Cooling Systems

We provide Service and Installation of the following:

Heat Pumps

Gas Furnaces

Air Conditioners

Gas Boilers

Mini Split Systems

Package Units


Air Handlers


Indoor Air Quality (I.A.Q.) Products

Geothermal Heating and Cooling Systems

Oil Fired Boilers

Roof Top Units


Unit Controls


Heating Systems

We understand that no other single system in your home plays a larger role in your monthly utility bills than your heating system. We can assist and provide you with cost-effective heating solutions, including furnaces, boilers, and heat pumps.

Air Conditioning

We can maintain and repair the system you have, or replace it with a new and more efficient system that will save you time and money in the long run. As factory-trained technicians, we can provide routine periodic inspections, licensed warranty and post-warranty repairs, and immediate emergency response.

Indoor Air Quality (IAQ)

We can repair an existing or install a new air purification system. Having problems with dry air in the winter months?  We can provide humidity control by installing a new humidifier, repairing an existing one, or just maintaining the one you have.


All of our technicians are factory-trained and certified to install, start up, and repair your new or existing system.

Here are some of the systems we specialize in:

Data Center Cooling – Liebert, Data Aire

Chillers- Daikin Magnetic Bearing, Turbo Core, Carrier, Trane

Variable Frequency Drives – Danfoss, ABB, Yaskawa

Ductless Systems – Daikin VRV, Mitsubishi City Multi


Tips and Tricks for your Heating & Cooling Systems
HVAC Guide:  The Components

HVAC Guide: The Components

The most expensive investment in your home is your Heating, Ventilation, & Air Conditioning system (“HVAC”). This guide will help you understand the components, cost, efficiency ratings, and maintenance required.   The Components: Indoor and Outdoor Units The...

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HVAC Guide:  The Cost

HVAC Guide: The Cost

              HVAC Cost: When replacing your system there are two factors that will determine the price of a new unit: 1. The type of fuel used (gas, oil, propane, or electric) 2. The new equipment’s efficiency rating ♦ Smart...

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HVAC Guide:  Efficiency

HVAC Guide: Efficiency

              Efficiency SEER Ratings Air conditioning units are designed for different efficiency ratings that are categorized by the SEER of the unit. You probably have a 10 SEER or lower rating if your unit is between 10 and 15...

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Service Areas

Capps Mechanical is located in Southern Maryland but services the counties listed below. If your city is not listed, please contact us and we will schedule a technician to service your area.

St. Mary’s
Prince George’s
Ann Arundel
Baltimore City

Alexandria City
Prince William
King George

Washington DC

Capps Mechanical

Capps Mechanical

Servicing DC/MD/VA

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