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  • Guest Blogs

    The Built-In Weakness of ‘Footprint’ Estimates

    Experts widely agree that human activities are harming the global environment. Since the Industrial Revolution, the world economy has grown dramatically. Overall this is a success story, since rising incomes…

  • Green Basics

    Inspecting Old Houses

    Home Inspection Basics This video series shows how an inspector identifies problems in a vintage home

  • Q&A Spotlight

    When the Problem Is Heat

    If you have problems dealing with the heat, you probably wouldn't like the desert Southwest, especially when conventional air conditioning is simply too expensive to use on a regular basis.…

  • Energy Solutions

    Commissioning Our Heat-Recovery Ventilator

    In last week's blog I described our state-of-the-art Zehnder heat-recovery ventilator (HRV), explaining its various features and specifications. This week I’ll review what should be a critical step in the…

  • Energy Solutions

    Our Top-Efficiency Heat-Recovery Ventilator

    In last week's blog I reviewed some of the general strategies used for ventilating buildings — or not. This week, I’ll zero in on the types of balanced ventilation in…

  • Energy Solutions

    Report on Our Ductless Minisplit Heat Pump

    It’s been pretty chilly outside, if you haven’t noticed. A number of people have asked me how our air-source heat pump is making out in the cold weather. I wrote…

  • Energy Solutions

    Energy-Saving Features of the Serenbe Community

    In this blog last week I described some of the unique features of Serenbe, a New Urbanist community outside Atlanta, where I had the good fortune to be invited by…

  • Energy Solutions

    Serenbe: a Green Town in the Making

    I’m just back from Atlanta, where I spoke on Saturday at the new Bosch Experience Center located in the unique Serenbe Community thirty miles southwest of Atlanta. I gotta say,…

  • Energy Solutions

    Smart Vapor Retarders

    Nowhere in building design has there been more confusion or more dramatic change in recommended practice than with vapor retarders. Thirty years ago, we were told to always install a…

  • Energy Solutions

    America’s Greenest Office Building

    I’m just back from a week in Seattle, where I attended the Living Future Conference, which this year had a theme of resilience and regeneration — a major focus of…

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