Installation lead means the person who owns the pad, the venting, and the moment we first fire a new system.
Install days are won or lost on prep: gas, venting, electrical, and a coil that actually matches the furnace. The installation lead runs that list so a 'simple swap' does not turn into a two-day mess.
They also decide when a job needs a second tech or a return visit instead of rushing a commission at 7 p.m.
Clean mechanical rooms and systems that start the first night. If you book this kind of work, this is the seat on the truck that is accountable for it.