#building science

This tech tip features a diagnostic flowchart by Genry Garcia. Thanks, Genry! The name of this document, “The MAD Room,” was chosen as a nod to the MAD-AIR study completed by John Tooley and Neil Moyer, presented in 1989. The teachings from that document played an instrumental role in creating the following diagnostic workflow. Disclaimer […]

A manual J load calculation will require you to input the U-value for the windows or “fenestrations” on the house. Fenestration is a fancy construction word for window. Figuring out the U-value and SHGC of a window on an existing home is very difficult. But first, let’s dive into what the terms U-value and SHGC […]

You may not know this, but the HVAC School podcast began before the website. When I started the podcast, I never intended to create a website, but there was more demand for quick tech tips than the podcast could hold. So, we started hvacrschool.com. In the same way, I never set out to create a […]

 In this episode of the HVAC School Podcast, host Bryan Orr speaks with Chris Hughes of The Energy Conservatory (TEC) about using the Roomulator card and DG-8 manometer for room pressurization testing. Chris provides background on how he came up with the idea for the Roomulator. He wanted an easy way for technicians to […]

NOTE: If you cannot view the recording, the video may still be processing. The maximum wait time is 24 hours. We apologize for the delay and appreciate your patience.

NOTE: If you cannot view the recording, the video may still be processing. The maximum wait time is 24 hours. We apologize for the delay and appreciate your patience.

NOTE: If you cannot view the recording, the video may still be processing. The maximum wait time is 24 hours. We apologize for the delay and appreciate your patience.

NOTE: If you cannot view the recording, the video may still be processing. The maximum wait time is 24 hours. We apologize for the delay and appreciate your patience.

NOTE: If you cannot view the recording, the video may still be processing. The maximum wait time is 24 hours. We apologize for the delay and appreciate your patience.