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David Butler has practiced as a building systems engineer for more than three decades. During this time he has 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.  Butler Résumé

Butler currently resides in the high desert in southeast Arizona where he enjoys helping builders, architects and home energy professionals optimize mechanical system and enclosure design for high performance homes. He's the founder and former administrator of the widely acclaimed Home Performance Forum, which later merged with Home Energy Pros. Butler holds a BS in Business and an MS in Engineering.

When not working, Butler enjoys music and astronomy. In 2005, he organized an astronomy themed tour of Chile for a group of amateur astronomers (Chile trip) and maintains a Yahoo! group dedicated to astronomy in Chile.

Articles
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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