unitedwithme@lemmy.today to Ask Lemmy@lemmy.world · 3 days agoAnyone in the southern Canadian or US Midwest or NE change their furnace filters yet?message-squaremessage-square20fedilinkarrow-up133arrow-down11file-text
arrow-up132arrow-down1message-squareAnyone in the southern Canadian or US Midwest or NE change their furnace filters yet?unitedwithme@lemmy.today to Ask Lemmy@lemmy.world · 3 days agomessage-square20fedilinkfile-text
minus-squareSaveTheTuaHawk@lemmy.calinkfedilinkEnglisharrow-up2·3 days agoIt’s a box filter. For some reason to the design was credited to those two. They used them in the Manhattan project.
It’s a box filter. For some reason to the design was credited to those two. They used them in the Manhattan project.