Please advise what Furnace Filter is and any other name that it could go by, I will then source it locally I am building a filter box to remove smoke from the exhaust pipe.
Thank you for any answers.
Bill Reibelt
Australia
[OP]
Member
Please advise what Furnace Filter is and any other name that it could go by, I will then source it locally I am building a filter box to remove smoke from the exhaust pipe.
Thank you for any answers.
Bill Reibelt
Australia
[OP]
Member
Sorry to all members, I have to learn to use the internet before asking stupid questions.
Thank you.
Contributor
NO worries mate.....we all need a little help now and again.
GARY ROBERTS
ShopBot Desk Top
Full Spectrum 60 Watt Pro
Contributor
Ok, now I have to know: what do they call them down there?
Yoga class makes me feel like a total stud, mostly because I'm about as flexible as a 2x4.
"Design"? Possibly. "Intelligent"? Sure doesn't look like it from this angle.
We used to be hunter gatherers. Now we're shopper borrowers.
The three most important words in the English language: "Front Towards Enemy".
The world makes a lot more sense when you remember that Butthead was the smart one.
You can never be too rich, too thin, or have too much ammo.
Contributor
A good pre-filter is a pleated paper one with a MERV rating of at least a 7, they come in difference thicknesses, 1 inch is more common.Originally Posted by Bill Reibelt
Retired Guy- Central Iowa.HVAC/R , Cloudray Galvo Fiber , -Windows 10
Contributor
Can't answer that for you but just don't ask for a napkin to wipe your face...
Contributor
Higher MERV rating means you'll trap finer particles but at the cost of greater resistance to airflow than with lower MERV numbers. More surface area means you have less resistance to airflow and longer filter life than if you have less surface area. Surface area with pleated filters comes from XY filter size, filter thickness, and number of pleats in the filter. The higher the MERV you use, the greater the surface area you'll want to minimize airflow restrictions. A 1 inch thick pleated filter is more common (typical for furnace filters), but a 4" or 5" thick filter (often called a whole-house filter) of the same XY dimensions will restrict airflow less and last longer before becoming clogged.
I'd recently begun to notice that smoke wasn't clearing very well in my laser and realized it was probably past time to change the prefilter again, and that I'd wanted to change the final HEPA filter when I last changed the prefilter, but didn't have one on hand at that time. The prefilter was, in fact, thickly coated with crud and the HEPA was definitely darkened, so I replaced both. Also looked at the gray coating over the entire surface of both activated charcoal trays, stirred them and found the dusty coating was throughout the trays. After weighing them, I decided to replace the activated charcoal as well. Since I had the cabinet open and all the filters removed, and it was a slow day, I finally pulled the 8" fan and its mounts, recut the the mounts to fit a 12" fan that I had picked up for greater air movement, and installed the larger fan. Wish I'd measured flow rate before and after changing the filters, and then before and after changing the fan, but didn't think about it until I was buttoning everything back up. Regardless, smoke now clears significantly faster than before the replacements! Whereas at the front of the bed farthest from the exhaust, smoke used to curl up and drift to the rear, now it ejects out of the kerf, rises maybe half an inch, and heads horizontally straight back to the exhaust vents. Should help tremendously with keeping the lens cleaner.
Contributor
True that.
Yoga class makes me feel like a total stud, mostly because I'm about as flexible as a 2x4.
"Design"? Possibly. "Intelligent"? Sure doesn't look like it from this angle.
We used to be hunter gatherers. Now we're shopper borrowers.
The three most important words in the English language: "Front Towards Enemy".
The world makes a lot more sense when you remember that Butthead was the smart one.
You can never be too rich, too thin, or have too much ammo.
Posting Permissions
Reply With Quote