Ventilation And Air Quality Instruction

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How to Size an HRV or ERV

Unlike a furnace or air conditioner, oversizing one of these can be a good thing. More

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Retrofitting Forced-Air HVAC With High-MERV Filtration

Allison Bailes explains why you can’t just swap out a cheap fiberglass filter for... More

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Understanding Filter Ratings: MERV, FPR, and MPR

Most discussions about filter efficiency refer to only one rating scale:  Minimum... More

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Bring Ventilation Ductwork Inside Conditioned Space
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Will Balanced Ventilation Be Required by Code?
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Commissioning a Ventilation System

Commissioning is not a word we hear much in residential construction, but it's a... More

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Panned Bays

Is it OK to use a joist bay for a return-air plenum in an HVAC system? More

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Solving for Comfort With a 'Smart' Thermostat

Tracking temperature, humidity, set point, and equipment runtime can uncover the... More

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Installing an ERV in a Two-Family Passive House

JLC’s Coastal Connection goes on site in Boston, Mass., where Placetailor is... More

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Diagnosing a Moisture Problem in a New Post and Beam House

If condensation is appearing on windows, green timbers might be contributing to... More

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