2 stage 3 ton heat pump system Lifetime outdoor unit replacement compressor warranty. 10 year parts and labor warranty. Replace supply and return plenums. Ducting is currently hard duct and will need to be cut back for sections of flex to reconnect. There is a hole, where the line set goes through the wall, that needs to be sealed up. See pictures. Sections of duct need the insulation reattached or added to.