How to Keep Your Seattle Home Cool During Heatwaves

When summer heatwaves roll into the Seattle area, keeping your home cool and comfortable becomes a top priority. While the Pacific Northwest is known for its mild climate, recent years have seen increasingly hot days—and without the right cooling strategies, indoor temperatures can soar.

Here are some smart, energy-efficient tips to keep your Seattle home cool during heatwaves, reduce energy bills, and avoid emergency breakdowns.


1. Upgrade or Install a High-Efficiency AC System

If your current air conditioner is more than 10 years old, it may not be equipped to handle the demands of extreme summer temperatures.

  • Consider a new AC installation in Seattle to improve efficiency and comfort.

  • Modern systems use up to 30% less energy than older units.

  • Look for ENERGY STAR® certified models with variable speed settings.

Need help deciding? Our HVAC experts can evaluate your home and recommend the best system for your needs.

💬 Get a free quote on AC installation in Seattle—book a consultation today!


 2. Don’t Wait—Schedule Preventive Maintenance

A heatwave is the worst time for your AC to stop working. That’s why it’s critical to schedule seasonal AC maintenance.

  • Replace dirty air filters (every 1–3 months)

  • Clean condenser coils and fan blades

  • Check refrigerant levels and airflow

If your AC is blowing warm air, making strange noises, or short cycling, it’s time to call for emergency AC service before the issue worsens.

🚨 Emergency AC service in Seattle available—call us anytime for urgent repairs.


3. Block Out Heat with Window Treatments

A huge portion of indoor heat comes from sunlight streaming through windows.

  • Install blackout curtains or heat-reflective blinds.

  • Use window films or solar screens for added UV protection.

  • Close curtains during the hottest part of the day (usually 12–5 PM).

Even small adjustments like using light-colored drapes can significantly reduce heat gain.


4. Use Fans Strategically

Fans don’t lower the temperature, but they do improve air circulation and make you feel cooler.

  • Use ceiling fans in the counterclockwise direction during summer.

  • Place box fans in windows to push out hot air.

  • Set your HVAC fan setting to “on” instead of “auto” to circulate air evenly throughout the day.


5. Set Your Thermostat Wisely

Smart thermostat settings can cut cooling costs and prevent overworking your AC.

  • Ideal summer setting: 75–78°F when home, 85°F when away.

  • Use programmable or smart thermostats to adjust settings based on your schedule.

  • Avoid frequent manual changes—it forces your system to work harder.

💡 Pro Tip: Every degree you raise your thermostat can save up to 3% on your energy bill!


6. Seal and Insulate Your Home

Prevent warm outdoor air from creeping in by sealing:

  • Cracks in doors and windows

  • Attic and basement air leaks

  • Uninsulated ducts and crawlspaces

Good insulation not only helps with summer cooling but also keeps you warmer in winter.


7. Avoid Indoor Heat Buildup

During heatwaves, small changes can help lower indoor temps:

  • Cook outdoors or use a microwave instead of the oven

  • Run appliances like dishwashers and dryers at night

  • Switch to LED bulbs that produce less heat


Ready to Stay Cool This Summer?

Seattle summers are getting hotter—and you don’t have to sweat through them. Whether you need a new AC installation, fast emergency AC service, or just helpful cooling tips, Lynnwood Heating LLC is here to help.

📞 Call now for fast service or to schedule a free AC system estimate.