The Healthy Indoors group is focused on indoor air quality (IAQ), mold, moisture control, radon, lead, air duct cleaning & HVAC hygiene, and building performance/ building science-related topics that affect the healthiness of our indoor environments, like air leakage.See More
Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment you have to sell, trade or wish to purchase.Please post the equipment age, serial numbers, condition, warranties and asking price.See More
"One thing that I believe could become an issue is that the tighter the house, the quicker it will become toxic without electricity. The problem goes beyond mold. It is aerosols from high velocity efficient toilets, active radon mitigation…"
"I also work with Habitat and like yours, our houses have oversized units because of the extreme tightness, high UA numbers and limitations on ASHP systems. We use a cycle timer and motorized damper for supply air ventilation. We…"
"From the sidelines, this is a draw. Your both right, if you live in Florida. North of the dehumidifier line, it's all about heat. Here in the mountains we don't need AC and contractors will tell you that the most cost effective…"
"I have been using an ultrasonic detector check for CFL's during HERS rating and am surprised by the high 20+ kHz output of CFL's in reflecting cans. I wonder if anybody has studied the sonochemical effects on the body since it has the…"
"With very little cure time you are sure to get a lot of deltaT. I would also recommend covering the lens/camera with a thin plastic bag to avoid the isocynate aerosols. Use a smoke pencil to confirm that areas of cold contrast are infiltration."
"If all zones from a single HP system are on the same floor level or above grade walls, it would probably be OK in Atlanta. However, conditioned basements are best left on a separate system that can handle lots of moisture. Attic rooms with insulated…"
Energy systems analysis for industrial processes and residential structures, utilizing advanced thermal and ultrasonic instrumentation that can isolate and verify energy wasting sources. In all of the aforementioned two principles apply (1) If you can't measure it, you can't control it and (2) if you can't isolate it you can't fix it.
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Paul Eldrenkamp has more than 30 years experience in construction and specializes in energy efficiency. In this interview Paul discusses ways to standardize deep energy retrofits. He offers tips for executing projects and managing homeowner…