24/7 Emergency Service Available

About Us

HVAC Unlimited in Northern Virginia

Founded by John Cunningham, HVAC Unlimited, Inc. is a class A licensed, bonded, and insured corporation, holding a Mechanical Master License in the state of Virginia and a Class A Contractor License. John Cunningham has worked for various HVAC companies as an apprentice, technician, vice president, and owner. His 20 years of experience and high expectations are relayed to the customer by way of superior service.

HVAC Unlimited, Inc. Vice President, Jack Cunningham, entered the HVAC and plumbing industry over 40 years ago, after serving in the United States Air Force. Currently he holds both a Mechanical and Electrical Masters License for the State of Maryland in addition to Mechanical, Electrical, Plumbing and Gas Fitters Master Licenses for the State of Virginia. Working his way from apprentice to General Manager of a Northern Virginia HVAC company, he’s eager to share his knowledge with others.

Previously, he sat on the HVAC Apprenticeship Advisory Board, the Plumbing Apprenticeship Advisory Board, and was the Vice President for the Adult and Community Education Scholarship Foundation. His contributions to these committees and several others have provided him with vast experiences making him a valuable asset to HVAC Unlimited, Inc.

Jeff Hood serves as HVAC’s plumbing manager and oversees our team of expert plumbers.

Our Mission

We are committed to excellence in all that we do. We strive to achieve and maintain unparalleled quality as measured by customer satisfaction, by providing the highest quality service and equipment available. As our reputation for excellence increases, so will our profitability and growth.

Our Principles

Each employee will strive to achieve 100 percent customer satisfaction at all times because our customer is not dependent on us, we are dependent on our customer. It is our promise that HVAC Unlimited employees will be friendly, courteous and honest in all relationships; treat others as they like to be treated; and to listen carefully, ask questions and determine what the customer wants and when.

We are committed to:

  • The ongoing training of our employees
  • Adequate and fair compensation for work performed
  • Providing the safest conditions possible to work in
  • Never intentionally damage the environment

Our Vision

It is our intention to:

  • Deliver products and services that will ultimately exceed our customer’s expectations.
  • Be perceived by consumers and peers as the leader in providing quality indoor air comfort
  • Be the best in all that we do; there is no room for second place.
  • Never forget our humble beginnings and to always remember that we are where we are because our original goal was quality, service, and honesty beyond compare.

Service Areas

You want someone who will take care of you promptly with expert care when heating, cooling or plumbing issues strike. We promise to respond as fast as possible when you call us with an emergency issue. Just contact us on our service repair hotline, and we will schedule your plumbing service or A/C repair and have a technician sent to your home or business right away. Serving Prince William, Fairfax, and Loudoun counties, including:

Our highly-trained and qualified technicians at HVAC Unlimited, Inc. strive for perfection when working with all clients, residential and commercial alike. From installation to service, your comfort is our goal and we’ll work until you are completely satisfied – charging customers for the job, not by the hour.

Ask about our 100% satisfaction guarantee!


Get the value-focused & trustworthy service you deserve today!

We have staff on call at any time of the day or night, every day of the year so that we can provide assistance during emergency situations.