We will remove old equipment per EPA regulations and install a 4 Ton Trane 17 SEER/13 EER/80% two Stage Heat and Two Stage Cool with True Variable Speed Blower. We will install new flue pipe, new secondary drain pan, new stainless steel gas flex with gas sediment trap. Install wet switch. We will install new condenser pad with all new electrical disconnect and breakers. Perform nitrogen purge of line set and pull vacuum down to 500 microns to ensure no leaks of refrigerant. Charge system with R410a Refrigerant to manufactures instructions. We will install all new R-8 ductwork, to be strapped up according to code. We will install (1) new supply plenum and (1) Return plenum. We will install (7) supply ducts and (2) Returns. The second return is being added to the system to where the original setup only incorporated a single return. We will install a new Honeywell Zone Board with all new motors and mechanical dampers. Install (2) Nest thermostats. We will perform a Title 24 duct te