Recent Comments and Answered Questions on Green Building Advisor

  • David Baerg | May 23,2018 02:14 PM EDT
    I would agree that this is a very good starting point for further research. I think we need to go deeper than suggesting that people keep their doors open if there are good reasons to keep them ...
  • Martin Holladay | May 23,2018 02:06 PM EDT
    Cramer, You're right. I've made the correction. Thanks for pointing out the error.
  • Cramer Silkworth | May 23,2018 01:56 PM EDT
    the equation should be AC capacity = CFA divided by sf/ton, not multiplied, no?
  • Jeremy Good | May 23,2018 12:50 PM EDT
    That's a good article, thanks. I've been in my house less than a year, so thermostat data gave me a much more precise estimate and in a target outdoor temp range. I have 12 months of the previous ...
  • Martin Holladay | May 23,2018 12:36 PM EDT
    David, I don't have answers to most of your questions. There's always a chance that Brian Just will see your comments and respond. I am hesitant to speculate, or to reach conclusions based on ...
  • Martin Holladay | May 23,2018 12:32 PM EDT
    Jeremy, The two quotes you pulled from the article point in the same direction. I agree with you that the second of the two quoted passages is probably more technically accurate. The fact remains ...
  • Martin Holladay | May 23,2018 12:29 PM EDT
    Dr. Jim, The flap that comes down from the Accuvent baffle is indeed a wind-washing dam. Install it in an airtight manner, and you are good to go.
  • Martin Holladay | May 23,2018 12:26 PM EDT
    Jamie, Thanks for your comments. I have corrected the erroneous link in the article. We appreciate the correction.
  • Martin Holladay | May 23,2018 12:24 PM EDT
    Jeremy, For more information on using historic fuel use data (or historic run-time data) to help size new equipment, see Dana Dorsett's article on the topic, Out With The ...
  • David Baerg | May 23,2018 12:09 PM EDT
    I find it interesting that closing the door produced a CO2 spike even in homes with a forced air system. That suggests that there isn't much mechanical air movement into the room. -were they ...
  • Jeremy Good | May 23,2018 12:04 PM EDT
    Reports from a smart thermostat can also help sanity-check a Manual J report when replacing an existing system when there aren't other major changes to the house. I recently got a Man J ...
  • | May 23,2018 11:54 AM EDT
    Thank you for the quick reply Mr. Hollday. This is the first I've heard about wind washing dams. I'm assuming the flap coming down from the Accuvent baffle does not qualify as sufficient to block ...
  • Jamie Hager | May 23,2018 11:46 AM EDT
    Clicked on the i-Tree tools link in the article and it sent me to a dead page. Looks like a small typo in the link is the culprit (left the "s" off of "tools"). If anyone does want to get to the ...
  • Martin Holladay | May 23,2018 11:46 AM EDT
    Dr. Jim, In general, it's a good idea to air seal the areas that you have indicated. You will also probably need to install wind-washing dams under each of your ventilation baffles, and these ...
  • Malcolm Taylor | May 23,2018 11:44 AM EDT
    Michael, Because the climate here in SW BC is so temperate but wet, covered outdoor living spaces are one of the things I always include in a house design. There are a couple of strategies to ...
  • Jeremy Good | May 23,2018 11:43 AM EDT
    Do you have support for this statement?
    Most researchers agree that CO2 levels (which are easy to measure) are a good proxy for levels of other contaminants in the air that may be ...
  • Calum Wilde | May 23,2018 09:44 AM EDT
    David, That's good to hear.
  • | May 23,2018 08:20 AM EDT
    Thanks for the help.
  • Jonathan Lawrence CZ 4A New Jersey | May 23,2018 08:08 AM EDT
    Thank you Martin. I am hoping Dana will chime in. I do have some additional information regarding the Daikin VRV unit in question. I spoke with their tech support yesterday and they ...
  • Martin Holladay | May 23,2018 08:05 AM EDT
    Chris, You should call up the contractor that performed the work, explaining your comfort problem. I'm guessing that the company didn't do an adequate job of assessing the size of the duct ...
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