FREQUENTLY ASKED QUESTIONS
ECDs, VCUs & STACK TESTING

Is an ECD the same as a VCU? Usually, yes. They are two names for an enclosed combustor.

What efficiency do Crimson units reach? 99%+ destruction efficiency, typically 99.5-99.9%, in independent testing.

Do I need a stack test under OOOOb? ECDs not on EPA's manufacturer-tested list need a TOC performance test, due January 22, 2027.

How do you size a combustor? From your peak and average vapor rates, gas composition and allowable backpressure.

Can you supply the whole package? Yes: combustor, knock out pot, BMS, flame arrestor, ESD valve, pad and stack test.

Do you rent units? Yes, combustors and flares for short-term jobs.