Lo.ng for the best air filter? Consumer Reports has honest Ratings and Reviews on air filters from the unbiased experts you can trust..Replacing the filter in your Bryant furnace is a simple, do it yourself job. To replace a filter you just need to take out the old one and slide in the new one. Make sure that the airflow arrow is pointing toward the blower motor or furnace..The length x height Return Air Filter Grille fits a inch hole. Grille has an easy open cover to make installing your filters a quick and easy task..Clean the units of lint, dust and rust flakes that affect performance. Burners Removed cleaned if necessary Heat Exchanger Inspected fors deterioration.