Subject: Continuos Duty Bilge Blowers
From: "Calif Bill"

Neither is your or Shen's. A E/R blower sucks the air out. Not blow air
in. Therefore there should be at the most a slightly negative pressure.

Buzzzzzzzzz!
Sorry, wrong answer.

Maybe on your 18 foot bow rider.
But there are many boats that use blowers to bring air out AND in. And some
(the Lazzaras come to mind) ONLY bring air in to positively pressurize the
engine room. If the inlets are filtered/baffeled correctly it keeps dirt and
salt out of the engine room.

Do a search for Delta T engine room fans.

Capt. Bill