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"We’re proud of the company we keep"

In the wake of the Coronavirus, we’ve got a few more ideas and products to add to your toolbox.  Try these solutions from Nu-Calgon.

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William E. Kingswell is proud to offer a diverse range of products for our commercial and residential customers.

Our Products

Residential HVAC

Are you looking at replacing your HVAC system with something a little more efficient? Partnering with the right HVAC wholesaler is a necessity!

Commercial HVAC

Commercial buildings have unique requirements, whether you are retrofitting an existing building or designing a building from scratch. William E. Kingswell has over 90 years of experience working with both to develop innovative, energy-efficient solutions that will stand the test of time.

Electrical Heating Equipment & Heat Pumps

The vast majority of residences in the country are still heated with traditional electrical heating equipment and central air. We stock a huge range of wholesale electrical heating equipment to meet the needs of contractors, engineers, and consumers.

Heat pumps are energy-efficient alternatives to traditional cooling and heating systems. They are very affordable in the long term and work just as effectively as other HVAC systems. Heat pumps work by transferring heat instead of producing it through gas or electricity, so many residential and commercial customers are willing to make the investment.


Boilers distribute hot water throughout a home or commercial building using pipes. Boilers offer effective zoning controls and work well for homes and any buildings 5,000 square feet or larger, and they are popular choices for large commercial spaces.

Furnaces & Convectors

Furnaces and convectors are popular heating choices for many home and business owners. William E. Kingswell is a prominent HVAC wholesaler of furnaces and convectors, and our staff would love to work with you to find the right heating solution for your property.

Coils & Controls

William E. Kingswell offers coils and controls for every major HVAC manufacturer, including Magic-Pak and Honeywell.

Water & Steam Unit Heaters

William E. Kingswell offers water heaters and the parts that you need to keep them running. We are a leading water heater wholesaler and have effective and affordable products for homeowners, engineers, and contractors.

Unit/Duct Heaters

Our duct heaters can heat buildings of almost any size or output need. Many of our unit and duct heaters also come with additional certifications so that you can feel good about using them (and your energy bills won’t be sky high!).

Packaged Units

Packaged units offer maximum convenience and efficiency, since they combine heating and air conditioning capabilities into a single unit. They save a tremendous amount of space, whether you are a contractor finding the right unit on behalf of a homeowner or an engineer needing space-saving solutions for a commercial building.

Split Air Conditioners

Mini-split air conditioners are growing more popular with residential customers every year, as they can benefit from multi-zone temperature control without a complicated installation process or the need for any ductwork.

Air Conditioning Units

Central air conditioning units keep you, your family, and your employees comfortable throughout the warm summer months. Whether you need an air conditioning unit and a furnace for your new construction or simply need a new unit to replace your aging one, William E. Kingswell is here to help.

Hydronic Heating & Evaporative Cooling Air Handlers

At William E. Kingswell, we offer quality hydronic heating and evaporative cooling air handlers for contractors, engineers, and customers. Our variety of heating and cooling units include horizontal hydronic units, vertical hydronic units, and power throw (PT) hydronic units.

Air Quality Units

Air quality units are growing in demand every year as commercial and residential customers strive to remove indoor pollutants from their surroundings, so if you are a contractor or engineer, you can rely on William E. Kingswell for what you need.

HVAC Parts

We also stock a wide assortment of HVAC parts. Many of the parts that we offer come with a manufacturer warranty so you can trust that they will get the job done.

HVAC Accessories

No HVAC system is complete without the right HVAC accessories, and William E. Kingswell is pleased to offer contractors, engineers, and consumers a variety of HVAC accessories. Whether you’re looking for a match to an older HVAC system or seeking new, modern HVAC smart thermostats, William E. Kingswell can help.

Air Conditioning Parts

William E. Kingswell offers a comprehensive range of air conditioning parts for contractors, engineers, and consumers. Our air conditioning parts come with manufacturer warranties and are in stock at our large warehouse for your convenience.

Air Cleaning Parts

William E. Kingswell offers a broad assortment of air cleaning and air purifying parts for contractors, engineers, and consumers.

Why William E. Kingswell?

When you choose William E. Kingswell for your HVAC products, you partner with a family owned and operated business that has satisfied the needs of hundreds of thousands of customers throughout our 90+ years in business. We offer excellent customer service and go above and beyond to meet the needs of every residential homeowner and commercial business we work with.

We Are Proud of the Company We Keep

William E. Kingswell has remained a distinguished provider of commercial and residential heating and cooling services since 1937. We have provided an unmatched level of customer service to all of our clients, and we enjoy being the preferred HVAC equipment distributor of countless customers. We offer a comprehensive range of high-quality heat pumps, boilers, unit heaters, HVAC accessories, and more. William E. Kingswell works with businesses and homeowners throughout Maryland, Washington, D.C., and Virginia, including Baltimore, Frederick, Annapolis, Fairfax, Manassas, Richmond, Fredericksburg, Virginia Beach, and Leesburg. To learn more about our extensive range of SpacePak, Concord, Allied Commercial, and Bard HVAC equipment, contact us today!