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phc june 2011 www.phcnews.com


HYDRONIC PRODUCTS


CK and CKT electric fan heaters


The CK & CKT wall-mounted electric fan heaters are ideal for new construction and renovation projects, in bathrooms, kitchens, bedrooms, hallways, playrooms and garages, etc. All CK & CKT heaters feature a built in thermostat (adjustable from 41 - 86°F), a frost protection setting designed to keep a room just above freezing temperatures. The new CKT extends the already impressive list of features by adding a 60-minute timer. Set up to an hour of high-output heat to quickly warm a room. When the timer goes off, the CKT will use the previous thermostat settings to make sure your room stays the temp you want. The CK series of heaters are available in four models: The CK 15E is a 120V, 1500 watt unit. The CK 20E is capable of running at either 208V, producing 1500 watts, or at 240V where it produces 2000 watts. The CKT 15E and CKT 20E share the same electrical specs, but add 60-minute timer-based operation. Stiebel Eltron.


e Circle 105 on reader reply Hydronic installation simple


Installing a hydronic system can often be like putting together a jigsaw puzzle. Simplify your boiler setup by selecting one of our newly expanded Caleffi Boiler Trim Kits. Take the guess work out of component selection by simply choosing the boiler trim kit part number that fits your needs. Caleffi offers twenty kit combinations with 2.2, 4.4 or 7.6-gallon expansion tanks and DISCAL™ high- performance air separators with 3/4", 1" or 11/4" connections. All kits are equipped with sweat or NPT connections, an automatic filling valve, an expansion tank check valve, two brass nipples and a brass tee. These convenient component packages are available with or without Caleffi backflow preventer to suit your specific needs. Caleffi.


e Circle 106 on reader reply The hot, humid climate in the


Washington, D.C., area dictated that air conditioning and de- humidification be given careful consideration. I learned that most passive houses


had been built in cool to cold climates. Not a lot of thought went into the AC systems of the passive houses I studied. Most simply had a ductless mini-split with a wall mounted cassette for the entire house. This may work in Minnesota or Maine, but it was not going to work in a four-level home in Washington, D.C.


Comfort & energy savings for 2-wire retrofits


43


tekmarNet®2 house controls and thermostats utilize 2-way communication to provide benefits that surpass basic thermostats and outdoor reset controls. Communication benefits include zoning with indoor feedback, heating & cooling interlocking, shared schedules, and outdoor temperature display on any thermostat. tekmarNet®2 thermostats only require 2 wires for communication and power, making them ideal for retrofit installations where new wiring is not feasible. Home automation and/or web access capabilities. tekmar Control Systems Ltd.


e Circle 107 on reader reply FROM THE FIELD e Foley continued from p 32 This is where I butted heads with


the Passive House Institute. You see, no passive house gets certified in the U.S. unless it passes muster with PHIUS (Passive House Institute U.S.). Their mechanical design theory can be summed up thusly: Simple = good, complicated = bad. It took multiple submissions and revisions before we finally came to an agreement. This is a spec house that will market well north of $1M. If we can’t keep the house cool in August, we are going to have problems. Stay tuned next month as I detail the mechanical design and


installation on this passive house project and how I managed to navigate through the PHIUS maze and get my mechanical design certified. ;


Dan Foley is owner of Foley


Mechanical Inc. His company has 14 full time and two part-time employees. His primary focus is on radiant and hydronics with large custom homes. Foley also does service, replacement, HVAC, sheet metal, controls, piping, renewables (geo and solar thermal), which services the Washington, D.C. metro area.


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