Heating Contractors in Upper Marlboro, MD

Comprehensive list of contractors in Upper Marlboro, MD offering heating systems installation, maintenance and repair services.

Business Listings

Christopher F. Kelly Sr. - President Since October 1994, Christopher F. Kelly Sr. has been the owner/president of Kelly HVAC., a complete service mechanical, sheet metal and plumbing contractor specializing in the service industry. Before starting his own business, Mr. Kelly completed five years in the Steamfitters Local 602 Apprenticeship Program while working for Giant Foods and Johnson Controls.


J&P has its own sheet metal shop, so we can economically fabricate any ductwork that a job requires and install that ductwork speedily and efficiently. From comprehensive service maintenance contracts to periodic service calls. J&P has the expertise to answer any and all heating and air conditioning questions. You deserve the highest service for your home!



Comfort is more than just hot and cold air. Create a comfortable environment for you and your family. Don't just feel warm and cold air - start experiencing warmth and feeling cool with a Total Comfort heating & cooling system. Total Comfort systems are designed with your comfort in mind.


Horizon Mechanical Services. is your complete commercial air conditioning and mechanical contractor. We have been servicing the Maryland, DC, and Virginia metropolitan area since 2001. Our master technicians are trained and licensed to service several brands of air and water cooled chillers, pneumatic and direct digital control DDC systems, cooling towers, and more.


Our goal is to provide to our clients quality products and services, at realistic prices, in an environmentally sound manner, while delivering opportunities for employees and contributing to the well being of the community. With this site, our clients have the capability to order all their fuel online! Just fill out a short form and you're on your way.


Whether you have an air conditioner, heat pump, furnace, boiler, water heater or plumbing requirements. We are pleased to supply the service, sale and quality installation of cooling, plumbing and heating equipment to a growing list of satisfied clients in the Maryland Anne Arundel, Montgomery and Prince George's County and Washington, D.C. area.


April 2009Thornton earns Mechanical Service Contractors of America MSCA STAR designation after surpassing stringent business and HVAC service standards set forth by MSCA. Thornton is the mechanical contractor for William V. Walsh Construction Company for this innovative project.


Family owned & operated since 1978. Serving the Maryland, Washington DC, Virginia and surrounding areas. Service and repair on ALL brands of Heating & Air Conditioning Equipment. Air Duct Cleaning service is available now. We use the Patented Rotobrush System consisting of a vacuum hose with a rotary brush on the end of it as well as a camera so we actually watch the whole duct cleaning take place.