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Heating

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    Net Zero House for a Cold Climate

    An architect shares his plan and process for building a northern Vermont house that produces as much energy as it consumes.

     
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    JLC Report

    State legislators deal blow to residentialsprinkler codes; robo-houses provide a window on energy-upgrade payback; more

     
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    TVA-ORNL Project Provides a Window on the Payback of Energy Upgrades

    Study finds that modest upgrades in insualtion and HVAC equipment dramatically reduce energy use in warm, humid climates.

     
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    Heat Pump

    The Tranquility 27 Series geothermal heat pump is ClimateMaster’s latest and most efficient unit, with an EER rating of 27.

     
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    Products

    Foam sealant; self-adhesive tile underlayment; geothermal heat pump; metal countertops; solar-powered exterior fixture; more

     
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    Retrofitting a Heat-Recovery Ventilator

    The challenges are finding a good place for the unit and installing the ductwork without butchering interior finishes.

     
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    RenewAbility Heat Recovery

    By recovering heat from household wastewater, the Power-Pipe can reduce water-heating expenses by up to 40 percent, the maker says.

     
  • Installing an Efficient Noncondensing Boiler

    Tax credits are great, but does your client really need a condensing boiler?

     
  • Retrofitting a High-Tech Heating System

    This design uses a gas boiler and solar thermal collectors as heat inputs, and incorporates an HRV into the air handler.

     
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    Innovative Products 2009

    A roundup of tools and materials found on the floor at JLC Live in Providence, R.I .

     
  • Insulating a Radiant Slab

    How much insulation is necessary under a typical basement radiant slab?

     
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    Products

    Anti-sweat valve for toilets; cold-weather spray foam; solar-powered dimmer for tubular skylights; standard-width high-performance range; faux slate roofing; more

     
  • Letters

    Protecting trees on site; radiant-heat claims revisited; unnecessary design regulations; pedal power; more

     
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    Products

    Noise-muffling floor underlayment; dramatic roof windows; natural-looking composite siding; manufactured moment frame; more

     
  • Letters

    Another look at energy claims; feeling the financial squeeze

     
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    Expanding a Narrow Laundry Room

    Cantilevering the floor and using the existing roof overhang kept costs down.

     
  • Does Radiant-Barrier Paint Work?

    Q: My painting subcontractor is recommending Thermo-Tek, a paint the manufacturer says is a radiant barrier. What can you tell me about products like this one or similar coatings made with something called ceramic microspheres that claim to have thermal characteristics and promise significant...

     
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    A Close Look at Common Energy Claims

    Understanding energy consumption and moisture movement in the homes we build is hard enough; rampant half-truths and misconceptions only make it harder.

     
  • Letters

    Drywall back-blocking in action; A-frame appreciation; hard workers in California; more

     
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    Products

    Windows; energy conservation

     
 
 
 
JLC Field Guide to Decking