How do these models make heat?

The units are rotary devices that create heat by shearing fluid. The heater’s anatomy consists of pocketed rotor and end plates, drive shaft and a rotational group. At the heart of the unit is the shaft driven rotor. When at speed, the unit creates centrifugal force on the fluid, forcing it out of the rotor pockets and directing it into the stationary end plate pockets. The collision of the fluid from the rotor to the end plates creates shearing of the fluid. With the fluid now tempered, it exits the heater and can be used in a series or parallel circuit.

Because the units only create heat by shearing fluid, the fluid never has to come in contact with specific heat zones (immersion probes, wands or plates). This makes the fluid heat up faster while using less energy than traditional heating methods, and best of all there is NO IGNITION SOURCE!

Operation Efficiencies

When operated in their designed RPM range, the overall efficiencies of the unit can exceed 95%. The heater’s pocket design is self-cleaning, as most fluids polish the internal surfaces. This trait allows the heater to maintain its high level of efficiency for a long period of time.

Control of the heat output can be accomplished in different methods. A units input rotation may be turned on/off, or operated at a reduced input speed or if the circuit allows, operated without fluid. Yes, it’s a neat concept, “run it dry”. Since the unit makes heat by shearing fluid, if the fluid is removed no heat is produced. The unit just sits and spins (model dependent).


Since the units create heat by shearing the fluid, there are no ignition zones or flames involved in the system, making the DHG an intrinsically safe unit. Since none of the DHG models emit exhaust, flame or fume, there are zero emissions. The DHG is a model of “Green Technology” with this inherent trait.