HHP2 hydronic high perform-ance heat-exchanger unit heaters are on the market for steam, hot water, glycol, or other fluid circulating heating systems.
They're designed for up to 450-psi and 550°F. in single or multi-pass core configurations.
Sixteen models are available and supported by HTFS ACOL thermal performance analysis software.
A 30-in fan size model is also offered which integrates a single multi-wing fan blade and speed reducer instead of two motors and two fan blades.