Resize A Furnace Filter (on the table saw)

[@IBuildItScrapBin]

I need a specific size filter, and the one I have is the right width, but it's twice as long as it should be. Of course there are other ways to do this, but I thought it would be interesting to try it on the table saw. Even though I did this and it worked well, I don't recommend that you do it. I'm willing to take responsibility for my own actions, but can't be held accountable for the stupid things you choose to do.

[@super_slo]

Aren't the cardboard sides edge glued into the filter media? And updates on how well the duct tape actually sealed and held to the filter? Swell idea.

[@donristuccia7425]

Great tip, Thanks, John

[@maxprophet2401]

My new K&N won't fit in the airbox, off to the lathe! Thanks John

[@chadrobertson75]

I snort laughed at this!

[@BikeBoatandTravel]

This is exactly why I watch all you channels John..... I always say "shit.... why didn't I think of that!!!" This would have been useful when I was building my shop dust filter .... but I didn't think of it!!!! Thanks

[@mumbles552]

Thanks for confirming this can be done! My furnace has hard to find size filters and I thought about resizing easily available ones. Now I will!

[@sylvijawildflower]

This is exactly what I needed to see. Thanks! I don't have a table saw, so mine will be a manual cut. Just seeing the adaptation of size and finishing off the end with tape was helpful.

[@cieslakvideos]

Most filter distributors who make filters to special sizes use a similar saw but with a stone wheel blade. This cuts all the materials nicely in a single pass and then they finish the cut edge with a cardboard end cap using hot melt glue. I will list a source for the end caps in another post.

[@nocturnalwoodworker7201]

I used my miter saw. I can never find the 12x12 at my local store but they do have a 24x12 at the same price. I cut it in half and get two filters for one. I don't worry about cutting both sides at once. It didn't seem to be an issue with the ones I have cut. Good video John!

[@keithgeorge2541]

John... you are sooooo frickin smart! You make feel like a beginner all over again!

[@rafvdp6391]

Nice result on that cut, no tear out at all.👍 Way better then what i would expect from a crosscut. 😀

[@Magnussen92]

Speaking of table saws; are we going to see you build the new one soon? I'm really looking forward to that build!

[@theothermarshal]

You are cracking me up 0:06, and 0:10... always fun on this channel.

[@DuncanEdwards.]

I always wondered why you changed your table saw ? congrats on your filter

[@super_slo]

Is that the new one he built? I seem to have missed the conclusion somehow, need to go back and find/watch the end of the series.

[@KipdoesStuff]

@@super_slo This is his 'new temporary' saw before he makes the new saw.

[@chuckholton4666]

I always do my filters on the table saw. 😁 it's an amazing tool. I love yours! If I didn't have one that I love, I'd build yours! It genius!

[@macedindu829]

I can't believe how well that worked.

[@michelradford164]

Thank you I needed to see that I just got a whole bunch of filters from Walmart so I told him what size do I needed but they still send out the wrong side

[@thomaskelly1228]

Just wondering, do you need a dust mask when cutting a dust filter seems redundant.

[@Wordsnwood]

I'm more interested in what you want that size for.... Hmmm. Good idea cutting half at a time!

[@thomaskelly1228]

I'm with Art, I'm curious as to what is in progress.

[@floored3145]

Isn't it for his shop air cleaner ?

[@floored3145]

Great , I just threw out a filter that I bought too big months ago. Totally would have tried this!

[@ramosel]

my dad used to do this for his paint booth filters. He would just sandwich them between two pieces of cardboard and cut the whole thing in one pass. Never an issue.

[@ken1Lane]

I’m surprised he cut that good, I would be scared to try that, I think I will stick to the bandsaw, nice video.

[@scottlouis7785]

I was afraid that steel would wrap up in the blade Glad to see it worked 1/2 x 12 probably did it

[@Subzerojosh]

Now this is the content I want crazy and wacky ideas

[@heroknaderi]

Nice 👍 😮

[@MarkH10]

Personally, I thought your speculation regarding the danger associated with the full cut was insightful. Your solution was brilliant, and effective.

[@JDeWittDIY]

Making a small dust collector / air cleaner?

[@johnnyb.2792]

How was this not on the Red Green show?

[@RVJimD]

Speaking of filters, have you come up with any solutions for the dust control issue with miter saws? Like everyone, even when I use a shop vac with my saw the dust still goes everywhere! Have a good week John!

[@sinso510]

kzbin.info/www/bejne/nWSthmWVnqyMrtE He discusses dust collection while building his miter saw station. Some people will custom fit a hood around their saw, may catch a little more.

[@instantsiv]

Saw hood to passively contain the dust. Then work on suction here and there to get most of it seems to be the best general direction to go in.

[@RambozoClown]

2HP saw with 5HP dust collector!

[@Koke01-24]

Thanks man

[@RambozoClown]

Much better than the chainsaw method.

[@PeterPetrakis]

I've cut down piles of cardboard before with a circular saw. It works *really well*.

[@theweepinghunter]

nice out of the box thinking :-)

[@tydjr]

You're a god

[@63256325N]

Thanks for the video.

[@brainfornothing]

Thanks for sharing !

[@NEEVAnurag]

I loved your smiles :-)

[@regularguy9264]

I was certain that there would be kickback! He didn't even use a sled, and you never know what that crazy grain pattern of a pleated filter will do!

[@FritsvanDoorn]

Daredevil!

[@blackemmons]

Good thinkin' John. JimE

[@jTempVids]

The HVAC installer didn't make the filter slot on my furnace to match any commercially available filters. I'm stuck using those cut-to-size fiber filters. The green fiber filters basically just keep some hair and large debris from going into the furnace. I'm looking into a similar solution.

[@karoltakisobie6638]

One can cut 6 cabin filters for the car from just one furnace filter in this way. Imagine savings.

[@KipdoesStuff]

I love your videos John, but I'm only here for the comments on this one, lol.

[@robertgullickson8758]

Perfect! 😄

[@TuffMovies]

nice

[@anthonyprokos5098]

Hi John, Perhaps you could run it through the saw backwards, have the teeth nibble on the mesh. Greetings from Greece

[@JDeWittDIY]

Or put the blade on backwards.

[@anthonyprokos5098]

@@JDeWittDIY That seems better. You won't need to fight the blade.

[@kenjoe]

I guess I won't need this extra pair of nail clippers after all :(

[@RexusKing]

0:07 Troll face engaged! On a serious note, maybe you could also snip all the metal meshes first, then cut it on the table saw in one go?

[@mikeporter59]

When are you going to start your table saw build? You would have better off to keep your old saw.

[@rossmckenzie1854]

Faced with any problem I now ask myself "What would John do?"

[@rfnoise]

I modified the furnace to accept standard sizes, do the work once.

[@kingwood207]

Duct tape and a table saw, that’s all you need to create stuff!

[@Pepsiaddicto]

Yikes. I’d be pushing with sticks behind a blast shield on the first go.

[@StrayCatHomestead]

You should have wrapped the cut end with bacon. Amazing results will result.

[@robinr.2233]

My tin snips are going to get a lot more down time.

[@Jer_Schmidt]

I never resize filters any other way!

[@CelestialLites]

AHHH, the ol' standard to metric conversion fitment issue.

[@franksalterego]

I used to buy hot-dogs at a stand across the street from Clint Eastwood's high school. (before he became famous.)

[@fiver-hoo]

hope to hell you didn't put ketchup on those dogs.

[@luckybookairvids]

dull blade snag wire, like a shotgun a finger gets caught up pulled into blade.. new nickname around the shop.. ect

[@russellborrego1689]

The Enforcer!

[@clydedecker765]

Dirty Harry strikes again!