An installer is asked to connect an old (but still working) propane-fueled cast-iron boiler, which was salvaged from another project, to a slab-on-grade floor heating system in a new workshop.
Navien NFC series is available in 175,000 Btu/h and 199,900 Btu/h models, each offering 95% AFUE, 11:1 turndown ratio, PVC venting up to 150’, and residential and commercial warranties.
When John Kopf eventually gets around to designing and building his own house, he will go with hydronic heat instead of a more traditional forced air system. Kopf knows a thing or two about heating, having spent more than 20 years in the industry. He currently serves as boiler product manager for Navien.
Slant/Fin’s VGH Boiler offers the next generation duo stainless steel water tube heat exchanger featuring larger water passages increasing the heat output, the company says.
