Model #HLB6 BROAN Vent Systems (Downdraft)

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Replacing microwave vent fan 220cfm with more powerful one without having to purchase a new microwave. I have Kenmore 721.80409400.


While your waiting on an expert response you can visit the website to compare the prices of microwaves just so you have an idea if you do choose to purchase a new one. I have provided the link below. Good luck!

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Jacqueline S -
September 30, 2010

Thank you for your question.

I can understand that you want more CFM for your venting of the Microhood.

  • You could only improve the CFM to 300 if you bought a different model anyway. Most of the Microhoods on the market are not any more powerful and you cannot add anything to the microhood you have to make it more powerful.

  • The problem with installing anything larger CFM is that the intake is too small on the Microhood to increase by that much. It is to restrictive.

  • I have given you a link to Broan to look at some alternatives.

Broan Inline model (hlb6) 600 CFM

Broan roof top model (331h) external 600 CFM

I hope you will be able to work out your venting issue.

Thank you for using Manage My Life.

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Sam A -
Sears Technician
September 30, 2010
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