is just getting in them in the first place. and from the sounds of it they are starting to at least try and tackle that problem. the fact that if three quarters of the population cant even get in the cars in the first place its always going to limit the sales. looking for an ideal time to change that furnace filter?
most residential filters are only 1″ thick and it does not take long the filter to stop being productive. there are thicker filters out there however, so here is our rule for changing your filter. 