Changes of air in Boiler gas duct

Question

How many air changes per hour required for Boiler gas duct?

gas_duct boiler air

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17 Dec '18, 03:03

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cheng · Answer 1 · Dec. 17, 2018, 3:04 a.m.

It must be 30 changes per hour

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17 Dec '18, 03:04

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