David Elfstrom

@DavidElfstrom

P.Eng, Energy management, measurement & verification. Born @ 327 ppm CO₂. Safer infrastructure, #ventilation, #CorsiRosenthalBox Also @ bsky, LinkedIn

Toronto

Joined March 2009

1.2K Following

14.3K Followers

19.4K Posts

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David Elfstrom

@DavidElfstrom

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