Usually the largest consumer.
WHY IT DOMINATES
Cooling requires substantial power, and it runs for long periods.
WHAT AFFECTS CONSUMPTION
Temperature setting Room insulation and sealing Sun exposure Unit condition Unit type and sizing
WHAT SETTING TO USE
The highest temperature that is genuinely comfortable.
WHY
Each degree lower costs noticeably more.
WHAT SEALING MEANS
Closing gaps around doors and windows, and keeping doors shut.
WHY IT MATTERS SO MUCH
Cooling air that escapes is money leaving the building.
WHAT SHADING DOES
Reduces the heat entering through windows and roofs.
WHAT OPTIONS EXIST
Window film Blinds and curtains External shading Roof insulation or reflective coating
WHY ROOF TREATMENT MATTERS HERE
Roofs receive the most direct sun and transfer heat inside.
WHAT SERVICING REQUIRES
Cleaning filters regularly Cleaning coils Checking refrigerant charge
WHAT DIRTY FILTERS CAUSE
Higher consumption and reduced cooling.
WHY SIZING MATTERS
An undersized unit runs continuously; an oversized one cycles frequently and dehumidifies poorly.
WHAT TO DO ABOUT SIZING
Have it calculated for the space, not guessed.
WHAT TO CONSIDER FOR NEW PURCHASES
Inverter-type units.
WHAT TO ESTABLISH
Which rooms genuinely need cooling, and when.
