We installed the system Performed 1 system heating diagnostics on a 2021 Rheem furnace that heats the mainfloor of the home. The furnace was operating when I arrived. The house was at 70 degrees when I arrived. The homeowner advised the tech that the furnace for the mainfloor struggles to heat the mainfloor above 69 degrees. I performed a diagnostics and found nothing broken on the furnace. I did find that the air filters was very dirty along with the blower wheel and blower compartment (full of dry wall dust). The bottom of the return plenum had large amount of air and dust. I recommended that the air filter gets replaced and the blower wheel and the bottom of the return plenum gets vacuumed out. I also recommended an Iwave to help keep the blower wheel and blower compartment clean. A clogged air filter and and a dirty blower wheel will prevent the furnace from moving the amount of air that it’s supposed to. I found no other issues with the furnace. I advised the homeowner that reco