Diversified Heat Transfer’s complete line of HVAC heating and cooling coils includes high-quality, underwater leak-tested industrial coils with stainless-steel and carbon-steel tube construction, plus steam, booster, fluid, evaporator and condenser coils.
Navien’s condensing gas heating boiler is available in four sizes: NHB-55, NHB-80, NHB-110 and NHB-150, with turndown ratios respectively of 7:1, 10:1, 11:1 and 15:1.
Uponor’s code-listed ProPEX lead-free brass commercial ball valves for PEX-to-PEX connections are available in sizes from 1/2” to 2” and are listed to ASTM F1960, NSF 14/61, NSF 359 and the Uniform Plumbing Code.
Danfoss’ OJ ETO2 Snow Melt controller offers an intelligent all-in-one control solution for ice and snow melting suitable for any application which uses hydronic or electric heating, including driveways, parking lots, sidewalks, stairs, ramps and bridges.
PM columnist Ray Wohlfarth, author of “Lessons Learned in a Boiler Room,” has a new book on the design and installation of replacement hydronic boilers — “Lessons Learned: Connecting New Boilers to Old Pipes.”