How to prevent back fire of boiler?

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How to prevent back fire of boiler?..

Answer / krishnamurthy

Keep the boiler furnace always in negative draft (atleast -
5 mmwC)

Is This Answer Correct ?    5 Yes 1 No

How to prevent back fire of boiler?..

Answer / s.khan

boiler can be prevent of back pressure by a good draft
system,i.e balance draft.due to induced draft there is a
negative pressure in furnace but it is not good for
efficient boiler,because of in this way hot gases goes out
tgrough stack very fast without giving complete heat to water.

Is This Answer Correct ?    2 Yes 0 No

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