Watts DHW unit
Watts showed a packaged domestic hot water unit, what used to be called a sidearm water heater in the U.S., that includes the plate frame heat exchanger, pump and controls — everything except the boiler.
Radiant manifold system
Once a radiant system is installed, the loop lengths are mostly likely not what was drawn on the design or even what the contractor intended when he started. Watts showed a radiant manifold system that is self balancing electronically based on supply and return water temperatures.
Navien wall-hung boilers
In a nod to its North American customers, part of the Navien displayed showed the wall hung boiler lines that are available in the U.S.
Danfoss radiant products
Danfoss in the U.S. Is mainly considered an HVACR manufacturer, the manufacturer of the Turbocor compressor among other products. As is typical with European manufacturers, there's a lot more available on the other side of the Atlantic, as shown in this display of hydronic radiant products.
The Grundfos booth showed two circulators familiar to American contractors, the Alpha2 and the Magna3. The firm touted the reliability of its circulators, such as the dry run protection in the Alpha2 and the differential temperature control that is now built in to the Magna3.
Uponor radiant walls
Radiant walls are a hot topic (pun fully intended), as a CONTRACTOR magazine article written years ago on radiant walls by contributor Joe Fiedrich is still getting plenty of hits on our website. Uponor showed a version that's ideal for retrofits in plaster walls. The arrangement is thinner than a conventional radiant wall system and can be easily plastered over.
Velcro fasteners for PEX tubing
Rehau showed a PEX gimmick that CONTRACTOR saw a few years ago from a different tubing manufacturer — they wrapped their PEX in Velcro hook and loop fasteners and the installer can walk it into place on this special mat. The mat is several inches thick and provides insulation value. The finished assembly would be covered with lightweight concrete.
Raugeo Helix Probe PEXa
Drilling boreholes for geothermal jobs can be problematic, especially if you need to go down 300 or 400-ft. and you need to find a drilling contractor. Rehau showed an option, the Raugeo Helix Probe PEXa. The coiled heat exchanger can go down to 6 meters or about 19.5-ft.
PV solar + heat pump water heater
Stiebel Eltron showed off a heat pump water heater that's paired with PV solar. A company representative noted that the top can come off the tank and be placed outdoors in areas with mild weather such as Australia. An Australian visitor, however, told CONTRACTOR that almost all water heaters are placed outdoors anyway in Australia, and that the heat pump water heaters often come on at night to take advantage of off-peak electricity rates and that they are noisy enough that they provoke fights with the neighbors.
Stiebel Eltron ERV
Stiebel Eltron displayed a whole-house energy recovery ventilation system that is undoubtedly quite good technologically and the "correct" way to ventilate tight buildings but it's probably way too much product for the U.S. where ERVs are small and often attic mounted. Or worse, there's only a bathroom exhaust fan.