Savings in energy
Vary the main airflow without changing the burner’s air-to-fuel ratio. Heat only the air you need, and run the air handler with about 30% less energy to move the same volume of air.
The patented system
Built around how air and heat actually work
A dedicated combustion blower keeps the burn clean while the main airflow stays flexible — less static load, less energy, more control.
Flexible design
Modular construction and low static load let the Heat Injector fit new systems or upgrades across many heat-and-airflow processes — with cleaner heated air than typical indirect-fired options.
No static load
Clean combustion without loading the main airflow. Inject heat into nearly any airstream and size the unit for the discharge temperature you need.
About the product
Heat Injector System™
Introduced to industrial and commercial HVAC markets in 2010, the patented Heat Injector (US Patents 7,360,534 and 9,459,022) was designed to heat fresh and recirculated air with less electricity and less fossil fuel.
Because airflow can change without upsetting clean combustion, operators get efficiency and control that conventional heaters struggle to match.
Where it works
Products that meet the job
From professional pest control to rooftop make-up air and custom process heat — one core idea, applied carefully.
Bed bug heating
Recirculate heated air safely with a dedicated combustion blower, industrial airflow, Automatic HP Boost™, and onboard temperature control.
Direct-fired duct heat
Cut static load on the main blower and heat only the volume you need — a cleaner, more efficient path than many indirect systems.
Heated make-up air
Pair the right air handler with a Heat Injector module sized for your discharge temperature — for buildings or systems houses.
Southern Breeze™
When exhaust pulls a building negative in cold weather, inject warm air at the intake so incoming air feels like a southern breeze — a low-energy pressure fix.
From the field
What people say
“The Krupps are fantastic people to work with… You won’t be sorry if you get one.”
Jason Murphy Optimus Pest Solutions, TN
“I’m really glad I didn’t go with an electric system. The heat injector is a beast!!!”
Mike Fillion Owner, NC Pest Control
“Dave has always been extremely helpful when it comes to turning my wishes into designs.”
Bob Henderson Distributor for sheetmetal enclosures
How can we help?
Tell us about your process, building, or treatment goal — we’ll help select and apply the right Heat Injector approach.