Summer Cooling Tips

Cooling can be the biggest energy user in summer, especially in apartments where heat accumulates. The most efficient approach combines preventing heat gain, using passive cooling, and running AC efficiently when needed.

Prevent Heat Gain

Block Solar Heat

Keeping sun out is more efficient than removing heat it creates:

• Close blinds and curtains on sun-facing windows during the day
• Reflective window films reject solar heat
• Exterior shading (awnings, plants) blocks heat before it enters
• Light-colored curtains reflect more heat than dark ones

Reduce Internal Heat

• Avoid using the oven during the hottest hours
• Use smaller appliances (microwave, toaster oven) instead
• Run heat-generating appliances (dishwasher, dryer) in the evening
• Switch to LED bulbs (they produce less heat than incandescent)
• Turn off electronics when not in use (they generate heat)

Passive Cooling

Natural Ventilation

When outdoor air is cooler than indoor:

• Open windows on opposite sides for cross-ventilation
• Open windows at night to flush out accumulated heat
• Close windows and curtains in the morning to trap cool air
• Use window fans to draw in cool air or exhaust hot air

Fan Strategies

Fans use much less energy than AC:

• Ceiling fans: Set counterclockwise for cooling effect
• Box/window fans: Create airflow through the space
• Personal fans: Direct cooling where you are
• Fans cool people, not rooms—turn off in empty rooms

Efficient AC Use

Temperature Settings

• Set as high as comfortable—each degree makes a difference
• Use a fan alongside AC to feel cooler at higher settings
• Raise temperature when away or sleeping
• Don't set AC colder thinking it will cool faster (it won't)

Maintenance

• Clean or replace filters regularly (monthly in heavy use)
• Clear obstructions from vents and around the unit
• For window units, ensure proper sealing around the unit
• Report problems with central AC to landlord promptly

Strategic Use

• Cool only occupied rooms when possible
• Close doors to uncooled areas
• Pre-cool before the hottest part of the day
• Use timer or smart features to avoid running when unnecessary

Personal Cooling

Cooling yourself is more efficient than cooling the whole space:

Stay Hydrated

• Drink plenty of water
• Cold beverages provide internal cooling
• Avoid excessive alcohol and caffeine (both can dehydrate)

Cool Your Body

• Apply cold water to pulse points (wrists, neck, temples)
• Take a cool shower
• Use a damp towel on your neck
• Wear light, breathable clothing
• Eat lighter meals (digestion generates heat)

Sleeping Cool

• Use breathable, lightweight bedding (cotton, linen)
• A fan directed at the bed provides personal cooling
• Slightly lower AC temperature for sleep, then raise overnight
• Consider a buckwheat pillow (stays cooler than foam)
• Cool down before bed with a cool shower

Apartment-Specific Challenges

Upper Floors

Heat rises, making upper-floor apartments warmer:

• Aggressive solar blocking is especially important
• Night ventilation helps flush accumulated heat
• Ceiling fans are particularly effective

Limited Cross-Ventilation

If windows are only on one side:

• Box fans can create artificial cross-ventilation
• Bathroom exhaust fan helps draw air through
• Open interior doors to allow air movement