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David Butler practiced as a building systems engineer for more than four decades. He consulted with multinational manufacturers, energy utilities and land developers on a variety of research and development projects related to advanced building systems and energy efficiency. He holds a BS in Business and an MS in Engineering.   Butler Résumé

Butler resides in the high desert in southeast Arizona where he's enjoying his retirement. He enjoys traveling, music and astronomy. In 2005, he organized an astronomy themed tour in northern Chile for a group of amateur astronomers (Chile trip) and managed a Yahoo! group dedicated to astronomy in Chile.

The Elephant in the Room - HVAC for High Performance Homes
7 Reasons Why Oversizing is Bad
10 Reasons Why Oversizing Persists
Furnaces in High Perf. Homes
ACCA HVAC QI Checklist
The Case Against HRV Systems
The Case Against Partially Conditioned Basements
Point-of-Use Alternatives to Hot Water Circulation Systems
Tankless Water Heaters
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