Preserve the useful detail
Measure wait and draw at priority fixtures and map heater, branches, power, controls, occupancy schedule, cold-line effects, and return options.
The decision on display
Do not transfer the hazard
Do not run a pump continuously by default or treat recirculation as repair for failing equipment.
Make the proposed work comparable
Define pump, controls, check valves, return or crossover, insulation, electrical work, permit question, commissioning, temperature, and instructions.
CURRENT PRIMARY SOURCE