hvac renewal begins

Renewal of HVAC systems begins at the onset of any replacement or significant upgrade of any or all of its heating, ventilation, and air conditioning systems.

The work can replace or significantly upgrade one of the named systems without renewing all three. Minor routine attention alone is outside the stated significant-upgrade scope.

HVAC renewal ends records completion of the replacement or upgrade. A wider renovation can have its own start and end dates beyond this system-specific work.