Welcome to Congressional HVAC

We are Congressional Heating and Air Conditioning who specializes in Residential and Commercial heating and cooling systems, including Solar panel installation.

Our installation crews are friendly, courteous and we explain the entire process, making you fully aware on what you could expect in your system. Congressional Heating and Air conditioning offers maintenance agreements at a reasonable price and always sends a reminder to schedule an appointment to assure that our system is operating correctly.

Congressional Heating & Air Conditioning provides HVAC Maintenance, Repairs, Installation and Replacement services in Maryland. We service throughout Montgomery county Maryland.


Heating and Air Conditioning Services

We are licensed and qualified in both residential and commercial service and repair.
Our technicians are well trained and capable of servicing and repairing all brands of equipment.

Residential Heating, Cooling and Air Conditioning

We are a recognized leader in the area for serving homeowners and businesses by providing ultimate heating and air conditioning system solutions.

  • General Service or Repair
  • New HVAC Installation or Design
  • Replacement, repair, Service for existing HVAC systems
  • Analysis for Indoor air quality

See more Residential Services Information... .

Commercial Heating, Cooling and Air Conditioning

Assures to keep your equipment operating efficiently, will help you manage your energy requirements and prevent costly downtime for your business.

  • Heating systems
  • Air conditioning systems
  • Ventilation systems
  • Boilers
  • Control systems - pneumatic, electric and electronic
  • Make-up systems
  • Computer room air conditioning

See more Commercial Services Information... .

Request a Quote

Request an Estimate!

We're here to help. Congressional HVAC is a Licensed Maryland Master Contractor with an office in Gaithersburg, serving cities in Maryland, throughout Montgomery county.

In the Community

Heating and Air Conditioning Services Gaithersburg, Maryland You Guessed It! It's Time For Your HVAC System Checkup
March 20, 2022 While it?s only March, summer will be here before we know it. Get your HVAC system checked before temperatures start to climb to make sure it?s running as efficiently as possible when you need it most.



We offer an easy all-in-one financing/payment service option for your HVAC service needs. Our flexible financing options are available for your HVAC installations and replacements.

Make a Payment Apply for Instant Financing

Heating & Air Conditioning in Gaithersburg, MD

Our staff has combined experience of over 50 years in both the Residential and Commercial air conditioning and heating market.

Contact us today to Request a Quote or schedule an appointment!


Commercial and Residential HVAC Projects