Using your Condux 08039500 replacement seal off is easy. First, make sure the power to the blower is turned off. Then, remove the old seal off from the blower. Next, install the new Condux 08039500 seal off in its place. Ensure it fits snugly to prevent any air leakage. If you're ordering the 08039700 part, don't forget to also get the 08066800 part as it's essential for the proper functioning. As for maintenance, regularly check the seal off for any signs of wear and tear. If it looks damaged or worn, replace it promptly. Keep it clean and dry when not in use to extend its lifespan.