Corbett Lunsford Archives

Corbett Lunsford

Corbett Lunsford is an expert in home performance diagnostics, specializing in building science, ventilation design, and advanced home testing, with extensive experience in optimizing the invisible dynamics of home environments—including physics, chemistry, and microbiology—and applying this knowledge to projects like high-performance homes and educational content, with a focus in the session on designing ventilation systems that incorporate circulation, filtration, humidity control, dilution, and pressure relief.

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Why is 3/8″ Liquid Line So Common? – Liquid Line Sizing

You may have noticed that 3/8″ liquid lines are generally the norm in equipment 5 tons and under. We went to a job where the system had a 1/2″ liquid line, and it got me thinking about the ramifications of going larger or smaller on the liquid line. Liquid Line Basics The liquid line should […]

Is a Smaller Suction Line OK? – Suction Line Sizing

In residential, most techs and installers size the suction (vapor) and liquid lines to the stubs on the equipment. In larger built-up systems, sizing the piping is rarely the responsibility of the technician. But what happens if we show up to a job where the lines cannot be (reasonably) replaced because the size is different? […]

Air Changes Confusion

Air changes per hour (ACH/ACPH) simply describes how many times the total quantity of air in a room (or structure) is completely replaced per hour. If you have a 10'x10'x10′ room, the room contains 1000 cubic feet of air. If the supply and return to the room provide a balanced 100 CFM (cubic feet per […]

The 5 Factors of Ventilation

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Making of a TV Show About Home Performance (Podcast)

In today's podcast, I talk with Corbett Lunsford about his new show about home performance and diagnosis. Home Diagnosis airs on PBS in winter 2018. Even though Home Diagnosis mostly deals with building performance, HVAC work is a large component of overall home performance. Corbett Lunsford used to be a pianist before becoming a building performance expert. He […]

Blower Door Testing, Building Performance & More w/ Corbett Lunsford (Podcast)

In this podcast episode, Bryan talks to Corbett Lunsford about blower door testing and the coming building performance revolution. Building performance and HVAC have been becoming much more closely linked lately. So, it's a good idea for HVAC techs to learn a bit about building performance. In the HVAC world, we often see homes with […]