Chief Investigator of Heyoka Solutions, 40 years of building science and residential ventilation experience. I am the author of the "Residential Ventilation Handbook" published by McGraw-Hill in 2009 (Version 2 published by Salty Air Publishing in 2017), Recalculating Truth (a novel) published by Salty Air Publishing in 2014, and The Residential Quality Control Handbook, Salty Air Publishing 2015, and Death at the Edge of the Diamond, Salty Air Publishing, 2020, as well as writing a regular column for HomeEnergy Magazine on tools of the trade. I am also a HERS Rater as well as being certified by BPI as a Building Analyst, Envelope Professional, Heating Professional, Healthy Home Evaluator, and AC/Heat Pump professional. I am a member of the ASHRAE 62.2 SSPC (the ventilation standard).