Repair or replace?
Safety, age, condition, repair cost, efficiency, comfort, distribution, fuel, electrical capacity, and renovation plans all matter.
Boiler, furnace, or heat pump?
The building load, existing distribution, envelope, fuel, electrical service, space, comfort goals, and backup strategy guide the choice.
Why is one floor uncomfortable?
Distribution, returns, zoning, stack effect, solar gain, insulation, leakage, controls, and equipment operation can overlap.
What should commissioning include?
Startup values, airflow or hydronic checks, refrigerant or combustion verification where applicable, controls, drainage, and documentation.