Serving DC, VA & MD
Text or Call! (703) 752-1251
Regular Rates 7 Days A Week
Quick & Effective Services

Backed by 100+ Years of Service

HVAC Services In Maryland

We serve as the most trusted HVAC company in the Maryland region, keeping our clients’ homes cool during sweltering summer months and warm during freezing snow days. As the most transparent HVAC company in Maryland, you know what your bill will be upfront. Our experts work at a flat-rate, ensuring that they will quickly work to diagnose and repair the cause of your HVAC problems.

Some of our HVAC services include:

  • Inspection and evaluation of the HVAC unit
  • General maintenance and cleaning of interior and exterior components
  • Leak detection and repairs
  • Replacement of malfunctioning or broken components
  • Coil cleaning and upkeep
  • Checking or replacing the HVAC or furnace filter
  • Evaluation and reconfiguration of ductwork
  • Cleaning of AC drain tube
  • Installing humidifiers or dehumidifiers
  • Whole-home air purifier installation
  • Air scrubber installation
  • Programmable thermostat installation

Annual HVAC and Plumbing Maintenance

To keep your home’s HVAC and plumbing systems in prime condition, it’s recommended that you schedule regular maintenance with a Maryland plumbing and HVAC company. We know that with busy schedules, travel plans, work deadlines, and all the other curveballs life throws us, it’s difficult to remember what was serviced when and what components of your systems should be finely tuned. 

To make sure your home’s HVAC and plumbing systems stay healthy, we designed our Service Partner Program. By joining, you can save money throughout the seasons, as well as prevent untimely and costly breakdowns. Learn more about the benefits of the Service Partner Program and what it includes today.

Trust Your Home To The Most Trusted HVAC and Plumbing Company In Maryland

With a 27/7 call center, we’re always available to take your call -- because emergencies don’t wait to happen during normal business hours! Our team of Maryland plumbing and HVAC experts are ready to handle the toughest of issues because we know that prompt and high-quality repairs are essential for your family’s comfort and safety.

As a result, residents need to have a Maryland plumbing, electrical and general contracting service that will reliably be on call to help address any problems that could arise in their homes or businesses. John C. Flood has been that service for more than 115 years, providing the quality, timely assistance that Maryland residents deserve.

If you’re ready to schedule service with the most trusted HVAC company in Maryland, call us at any time at (703) 752-1251 or schedule service online.


Two bridges

Maryland is one of the most historic states in the nation. But the beautiful architecture, picturesque neighborhoods, and charming city centers that come with age also come with infrastructure issues.  Just like the majority of other homes in the northeast, most homes in Maryland were built in the 1980s. 

No matter what HVAC or plumbing issue you come across in your Maryland home, you need a team of expert repairmen that are innately familiar with issues unique to Maryland homes. If you’re looking for a Maryland plumbing and HVAC company you can trust, turn to John C. Flood. 

Our team of certified HVAC and plumbing technicians is always professional, prompt, and knowledgeable. As a local plumbing and HVAC company servicing the Maryland area for over 115 years, we’ve seen it all! There’s no problem that we can’t handle, whether it’s annual maintenance, emergency repairs, or seasonal service. 

Plumbing Services in Maryland

As the best plumbing company in Maryland, John C. Flood’s plumbers can make sure your water heater, sump pump, water pressure, drains, etc. are all functioning efficiently and correctly. Our team of licensed plumbers can catch looming issues far before they occur. 

Some of our plumbing services include:

  • Backup sump pumps/waterproofing
  • Commercial and residential plumbing
  • Complete bathroom remodeling
  • Drain cleaning
  • Faucet repairs
  • Low water pressure problems
  • Polybutylene re-piping
  • Sewer ejection pump replacement
  • Sewer line video and underground leak detection
  • Toilet repairs
  • Underground water line and sewer line repairs
  • Water purification
Schedule Your Service
If you are looking for an HVAC contractor, plumber, electrician, or remodeling crew in the Maryland, Northern Virginia, or metro D.C. regions, trust John C. Flood to take care of the job.
  • $675 Ecobee Smart Thermostat Installed
  • $500 OFF Any Complete Standby Generator Installation
  • $250 OFF Complete Panel Upgrade
  • $250 Water Main Replacement
  • $1,295 Installed Air Scrubber
  • $50 OFF Any Gerber Toilet Installation
  • $500 OFF Sewer Line Replacement
  • $150 OFF Any Water Heater Installation
  • $150 OFF Zoeller 507 Battery Back Up Sump Pump Installation
  • NATE Certified
  • Rheem pro partner
  • Bryant Factory Authorized Dealer
The Team to trust
  • Highly Accredited & Highly Rated With 1000's of 5-Star Reviews
  • 100+ Years of Experience Serving Generations of Families
  • Regular Rates 7 Days a Week For Your Convenience
Serving Washington DC, Maryland & Virginia
If you are looking for an HVAC contractor, plumber, electrician, or remodeling crew in the Maryland, Northern Virginia, or metro D.C. regions, trust John C. Flood to take care of the job.
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