Which Home Furnace Filter is the Best? Let’s Ask SCIENCE!
On the amazing Project Farm, Todd wonders what the real performance characteristics and differences are between cheap furnace filters and expensive ones. As always, he creates testing rigs and puts a whole pile of filters, from $1 to $50, to the test.
Tl;Dr: So which one won? It’s complicated. The thicker filters (2″ and 4″) performed better than the common 1″ filter size, but your furnace may not accommodate a larger size. The permanent, washable filter did not perform well. Nor did the cheap ones. Looks like you want to get the thickest filter your furnace will accommodate and one with the most pleats in the outer filter. Overall, the 3M brand filters did really well, like the 600, 1085, and the 1900.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.