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Old 09-25-17, 11:24 AM   #27
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Join Date: Sep 2012
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I have anemometer / wind meter so will be able test the units rear vent airflow and post real numbers to play with.

It may well exhaust closer to 20 or 25% then 30% as some web info suggests.

I will try the unit using a 6 to 4 inch reducer to fit the current vent and see how it runs.

I have the reducer already it a quality one with a smooth transition so flow will be less impacted.

Thinking the velocity will increase and noise when the reducer is in place so flow losses will be minimized. In a HVAC set up they use branches and vent size to control air flow to different areas of the building so those flow rate reductions do not apply to this set up or so I now deduce.

I'll test the flow differences when the unit arrives and post the difference.

As a bonus we will get some actual numbers to compute with. the web posts say 30% flow out for the last 10 yrs of posts , things may well of changed for the 2016/ 17 models.

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