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Filtration for HVAC

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Forum topic by agallant posted 01-05-2016 06:04 PM 389 views 0 times favorited 4 replies Add to Favorites Watch
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agallant

530 posts in 2354 days


01-05-2016 06:04 PM

4 replies so far

View MadMark's profile

MadMark

978 posts in 921 days


#1 posted 01-05-2016 06:33 PM

Ok, so you’re going to an enclosed system with the garage door closed (or otherwise inside).

You DC exhaust needs to go into a .5 micron bag. The nasty stuff is in the 1-5 micron range. You don’t want that floating in the air. That should reduce the fine dust to a minimum. Just vac up the big chunks into the separator and let the .5 micron bag do the rest. There will be dust. Vacuum often. My AC unit has a ‘filter dirty’ light. Listen when it speaks.

Have fum!

M

-- Madmark - Madmark2150@yahoo.com Wiretreefarm.com

View woodwringer's profile

woodwringer

4 posts in 340 days


#2 posted 01-05-2016 06:46 PM

Most minisplits have a woven monofilament filter that is washable. Because they usually have a curved front, I can’t think of an easy way to add more filtration. You might be able to build a box that would cover the entire unit with a filter at the top and an opening at the bottom that seals around the air outlet louvers, but you should be able to get by just washing the filter often.

Woodwringer

-- Woodwringer

View Matt Rogers's profile

Matt Rogers

69 posts in 1438 days


#3 posted 01-06-2016 01:07 AM

I just installed a Mitsubishi minisplit in my shop. I have central dust collection with a cyclone located outside the building, but I don’t always turn it on unless I am doing a lot of work. My unit sucks air in at the top, which is flat. I just placed a piece of cut-to-fit air filter material on the top and it acts as a pre-filter to take most of the dust out of the air before it goes into the unit. I was going to build a box around the unit, but I can’t see it being that much better than placing an extra filter over the inlet. I also have a remote on the wall and shut off the unit when I make a lot of dust – just a press of a button before and after I sand or cut some material. I could set it to only run at night when there is not be dust floating around inside. It has only been operating for a week, so I have yet to see how it will all work out, but it is certainly a lot better than a cold shop. I love having heat.

-- Matt Rogers, http://www.cleanairwoodworks.com and http://www.cleanairyurts.com

View Jim Finn's profile

Jim Finn

2417 posts in 2390 days


#4 posted 01-06-2016 02:34 PM

I have two window units in my dusty shop which is very similar to the, through the wall, unit only a LOT cheaper. I made a simple shelf in front of the air inlet and set a pleated filter in it. Still some dust gets inside the unit so I occasionally clean the coil with coil cleaner from Lowes. My dust collector exhausts outside.

-- "You may have your PHD but I have my GED and my DD 214"

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