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PAGE 15 - CRAH - GUARDIAN SERIES
03 SECTION THREE
ENGINEERING
& QUALITY
Every spec says "low leakage." Almost nobody proves it, at pressure, on the 
unit being purchased. Guardian casings are proof-tested positive and negative 
— to −12” w.g. on adelivered 725 kW unit — and every machine leaves 
Massachusetts run-tested: fans,controls, monitoring, piping. Fifty years of 
union craftsmanship is the quality system underneath.

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