John Proctor

John Proctor, P.E. is the CEO of Proctor Engineering Group, San Rafael, California.

Articles By Author

Thinking Ahead to a Humid Summer

Author: John Proctor
March 01, 2005

Q. I recently read that a variable speed, two stage air conditioner can maintain 50% relative humidity (RH) even when the latent load is 60% of the total load.Would this really work?      &... [continue reading]


Duct Leakage: How Much

Author: John Proctor
January 01, 2001

Q:Is there a standard for energy-efficient ducts? I was called to a home built in 1955 that is under a warranty from a recent sale. The customer wanted us to “fix the ducts.” ... [continue reading]


Crawlspace Condensation

Author: John Proctor
March 01, 2001

            Crawlspace Condensation Q:I was called to a doublewide mobile home to investigate a problem with a 4- year-old duct system (the original duct system was ... [continue reading]


Sizing Air Conditioners

January 07, 2010

A mountain of data leads to an unusual conclusion - sometimes bigger is not so bad. [continue reading]



Author: John Proctor
January 01, 1993

As refrigerators become more and more efficient, consumers and utility demand-side managers are faced with a number of questions. [continue reading]


Leak Detectors: Experts Explain the Techniques

Author: Various Authors
September 01, 1993

This article is an effort to bring together the ideas of several innovators who have invented methods of diagnosing duct leakage. [continue reading]


Savings and Showers: It's All in the Head

July 01, 1994

How much energy do low-flow showerheads actually save? To answer this question, Proctor Engineering Group (PEG) and Pacific Gas and Electric Company (PG&E) metered 243 showerheads as part of a larger evaluation of PG&E's low-flow showerhead rebate program. [continue reading]


Bigger is Not Better: Sizing Air Conditioners Properly

May 01, 1995

A colleague of ours (we will call him Bill) approached us at a conference seeking advice on selecting an air conditioner for his renovated home. Our recommendations included, "Be sure that the cooling load is calculated and that the air conditioner is sized to that load." [continue reading]

Blogs By Author
SPONSORED CONTENT What is Home Performance? Learn about the largest association dedicated to home performance and weatherization contractors. Learn more! Watch Video