What is the purpose of a furnace drip pan and how does it help in maintaining the efficiency of the furnace system?

A furnace drip pan is designed to collect any excess water or condensation that may accumulate during the operation of the furnace. This helps prevent water damage to the furnace and surrounding areas. By keeping the furnace dry, the drip pan helps maintain the efficiency of the system by preventing corrosion and mold growth, which can hinder the furnace's performance.