Quantum Coil Technology - provides durable and robust operation in harsh environments;Microban drain pans are made of noncorrosive, V-resistant polymer and include an antimicrobial agent that provides protection against mold and mildew growth;Durability/Reliability - Sleeved distributor tubes help prevent leaks due to the tubes rubbing together;Ease of Installation - Lighter weight than copper equivalents, supply and return line patch plate provided with unit, easily accessible port to add field-installed TXV if needed;Ease of Service - Anti-microbial drain pan reduces the chance for clogs due to mold and mildew. Only water is required for cleaning;Peace-Of-Mind-Protection - The Lennox cooling coils come with a 5-year limited warranty on covered components. Cover components may be eligible to receive a 10-year limited warranty with online registration, see actual warranty certificate for details