Plenum heaters are designed for enclosed spaces, specifically plenums and crawl spaces. They're also placed in hallways, bathrooms, concession stands, entryways, parking garages, and utility rooms because they don't require any clearance and are easy to maintain. Industrial and commercial plenum rated heaters are an unobtrusive heating solution for a small, concealed space, and they're commonly used for freeze protection or with your ductwork to supplement your primary heating system. In fact, adding a plenum heater is a cost-effective way to upgrade your fossil-fuel system to a dual-fuel system to take advantage of off-peak utility hours, extend the lifespan of your primary system, save money on heating, improve comfort levels in your facility, and create a more efficient HVAC system.   

At NorthStock, our electric plenum heaters are available in a range of sizes to suit your application. Search by part number or take a closer look at our extensive selection:

About Commercial and Industrial Plenum Heaters

Plenum rated heaters are built with a variety of thoughtful features, depending upon your chosen model, and offer several advantages for installers and users:

  • Quiet, efficient operation

  • Easy to install in tight spaces

  • Compact design that requires zero clearance

  • Can prolong the life of your primary heating system when used as a supplemental heat source

  • Freeze protection for rooms containing sensitive equipment and products

  • Easily removable single panels for simplified maintenance

  • Built-in disconnect switches

  • Fan-only option

  • High limit thermal cutout and automatic reset

  • Compliant with UL 1995 standard for HVAC equipment

  • NEMA 1 gasketed control panel

  • Rugged powder coated steel construction for durability

  • Heavy duty steel finned heating elements

  • Acoustic fiberglass insulation

  • Single point power connections

  • External 24 volt thermostat controls

  • Pre-notched duct collars

  • And more

Because a plenum rated heater must be trusted to work efficiently all season long to protect your equipment or provide comfort in hard-to-access spaces, they're engineered to be low maintenance, reliable, and easy to service. When you choose a plenum heater from a manufacturer like QMark, you can rest assured you're getting a durable, trustworthy unit backed by a company with a history of innovative design and engineering and excellent customer service. 

When you purchase a plenum rated heater from NorthStock, you may be asked to confirm your understanding that your order is not cancelable or returnable and that you have the appropriate electrical service to operate the unit. You'll also see a list of optional compatible accessories, like thermostats, so you can easily include everything you need in your order. We want to make sure you get the plenum heater or any other HVAC part or unit you need as quickly as possible. 

At NorthStock, we provide as much information as we can about every item, including availability and lead time, photos and descriptions, installer's guides, product catalogs, and more, so you can make an informed purchase. Our low, factory-direct pricing is always for new (never used or refurbished) products, and we happily combine that with special pricing on high-volume orders if you contact us in advance. Every order, no matter how big or small, ships fast and free in the lower 48 states. Expedited shipping is available at check out. 

As a leading HVAC distributor, NorthStock is proud to provide high-quality plenum rated heaters from industry leading manufacturers like QMark. Our knowledgeable customer care team is standing by if you have any questions about these efficient units. Contact us to learn more about our wide range of commercial and industrial heating, cooling, and ventilation solutions or to place your order for a plenum rated heater.