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I hate it when I don't see ahead of time what seems obvious afterward. I've assembled a lot of things in my life, including a house and two VW engines, and I can't tell you how many times I've gotten to the end and then had to undo everything because I put a piece in backwards or skipped a step. ...
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I've written about the load calculation and equipment selection process I went through for the new Mitsubishi* ducted mini-split heat pump in my house. Now let's take a look at the design and performance of the duct systems for the two air handlers. Laying out the ductsThe schematic diagram below...
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One of the topics I've hammered on for years is the inadequacy of using rules of thumb for sizing air conditioners. The standard one ton of air conditioning capacity for each 400 to 600 square feet of conditioned floor area just doesn't work. We know that a load calculation based on how a...
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Last August I began a series of articles on filtration and indoor air quality. You can find the list of them at the bottom of this article but let's do a quick review here: We spend a lot of our time in buildings. A lot of indoor pollutants are generated in the kitchen and not removed by the...
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Over the past few months, I've taken a look at some critical issues for indoor air quality. Starting with the issue of how much time we spend indoors, I then wrote about kitchen ventilation, the panoply of indoor air pollutants, problems with filters in general and with high-MERV filters. Now let...
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