A filter is a pleated or other type of device used to remove dust and other particles from air to protect the HVAC equipment. Filters vary how well they work and it is measured as MERV rating.
(clean) free from dirt or impurities; or having clean habits; "children with clean shining faces"; "clean white shirts"; "clean dishes"; "a spotlessly clean house"; "cats are clean animals"
Remove the innards of (fish or poultry) prior to cooking
the act of making something clean; "he gave his shoes a good cleaning"
make clean by removing dirt, filth, or unwanted substances from; "Clean the stove!"; "The dentist cleaned my teeth"
Make (something or someone) free of dirt, marks, or mess, esp. by washing, wiping, or brushing
Change your furnace filters
I helped out a lady down the road from where I live, I found out she was having trouble with her furnace and being she's in her 80's I didnt want to see her furnace go out and have her be without heat. Minnesota winters can be really nasty
Her furnace with clogged with dirt and and lint from a nearby dryer. I ended up taking off a blower motor and a few other parts on the furnace and cleaning them out too. I ran to the nearby home depot and bought her new filters. Tomorrow im going back to take care of the venting problem when it comes to the lint issue of her dryer.
I like doing this for the elderly in the community. I've made some great friendships and I feel a lot better knowing that they have properly functioning furnaces, sinks etc etc
Harman SF1500AFurnace WoodCoalCentralHeat
Harman Hot-air Furnaces have three internal systems that help maintain a clean, consistent and comfortable temperature throughout your entire home: a complete automatic start and stop blower system, an automatic draft system with high limit control and a filter system to ensure clean air. All you have to do is set the thermostat! Harman’s sophisticated draft control system knows when to cause the fire to burn hotter and supply just the right amount of heat. And one simple adjustment lets you quickly switch from wood to coal.