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big ass fans

1/7/20       
the google Member

looking at one of these for the new place. found one used locally to us, but wonder how they perform in a dusty environment (and in kicking up dust).

experience/thoughts?

1/7/20       #2: big ass fans ...
Jim

We bought two used 18' fans. Very capable of churning up dust and paperwork if you get above 60% on speed range.
We usually run around 25%. Nice breeze, but not like a typical wall or pedestal fan. Highly recommend.

1/7/20       #3: big ass fans ...
the google Member

jim,

thanks for your reply.

do you run them in reverse in the winter time? for us, a lot of heat resides at the top of our building (20' ceilings), making it expensive to heat the lower part that we occupy. any realized costs savings associated with running the fans in reverse?

what is the size of your shop? i was thinking about one fan for 7000 sf.

1/7/20       #4: big ass fans ...
Robert Duff  Member

Website: http://www.abettercloset.net

I have a 16' Entrematic HVLS fan (Big Ass competitor) and could not imagine being without it. Well worth the $4500 cost (self install, very easy). Space is 6000 sq ft and the fan is centered over the 4000 sq ft shop area. I have a Cambridge thru the wall heater and the fan evenly distributes the heat through the entire building. I don't reverse the fan because it distributes the heat so well. The building is well insulated.

1/8/20       #5: big ass fans ...
Jim

Plant is 95,000 sq ft.
Fans are in an area that didn't have good circulation. We use cross-ventilation fans for most of space.
We don't reverse in the winter.

1/9/20       #6: big ass fans ...
Shop Heat Member

We have a lot going on. Our shop space is 48,000. We have two Cambridge Direct Fired Furnaces. 750K BTU each. They pull in 100% outside air and have no vent, very efficient. They are supposed to not allow the air to stratify. Our dust collector returns to the building directly through the short end of the rectangular floor space. Our ceilings are over 20'. I find it amazing that there is no stratification of the air. It is around 1 degree warmer by the ceiling. I don't know if it is the furnaces or the collector blowing downs the center of the shop but I like it. In our old building it was HOT by the ceiling. We had standard unit heaters.

We then have 2 large fans high on the wall at the end of the building. I believe they are a 3hp and a 5hp belt drive, 48" and 54" respectively.
They keep the air moving in the summer. Everyone also has a pedestal fan. Our building is pleasant in the summer, as pleasant as it can be. We built insulated boxes with hinged doors over the fans and we shut the doors in the winter.

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