Two weeks from launching Apply, I was rewriting a house HVAC proposal into three phases.
The original plan had too many connected parts. The basement was going to be finished, but that work was delayed. The existing system served several floors badly. Some ducts needed insulation. One ran through an exterior kitchen wall. The condensate line needed a better route. The third floor would probably need a separate solution.
Doing all of it at once was not realistic. Waiting until every part was possible was not useful either.
Phase one was the work that could happen now. Insulate the basement supply ducts. Remove the kitchen vent running through the exterior wall. Split a crowded duct so the kitchen, hallway, and second floor could get better airflow. Move the condensate line outdoors and add a neutralizer if the system needed one. Open the basement vents because the basement would eventually become living space. Remove and cap two unnecessary closet ducts. Make sure the smart thermostat worked.
There were still questions inside that list. Could the supply and return in the open basement area move higher? Would splitting the crowded run actually improve the rooms above it? What had to stay accessible for the later basement work?
Phase two was the larger air-conditioning work: replace the condenser and possibly run another duct between the second floor and basement.
Phase three was separate units for the third-floor bedrooms. That could wait until there was a platform outside for the equipment. Even then, I wanted to know whether the rooms could operate as separate zones.
I was not trying to invent a perfect mechanical plan. I was trying to make the sequence explicit enough that a contractor could price it and the house could keep moving.
Apply was on the same calendar. The public launch was close, and the schedule was already full of production files, web copy, store work, and the hundreds of small decisions that appear just before something goes live.
The house did not care about the launch. The ducts were still in the basement. The useful move was to stop treating the entire system as one problem.
First, fix the ducts.