HOME
Summer Prep Guide: AC Efficiency Hacks
Summer hits, your AC kicks on, and suddenly your power bill looks like a car payment.
Before blaming your system, try these proven AC efficiency hacks — simple steps that keep your home cool without draining your wallet.
This guide covers coil cleaning, airflow checks, shading tricks, thermostat settings, and balancing tips that work in Calgary’s dry summer heat.
Whether your system is brand new or ten years old, these small adjustments can make a huge difference in comfort and cost.
Don't Let Your AC Sweat (Or You)
When the Calgary heat finally shows up, your AC doesn't get to warm up—it goes from "off" to "full blast." The catch? A poorly prepped system works harder, costs more, and cools less.
Good news: a few simple hacks can squeeze way more efficiency out of your cooling system—and maybe even save you enough to justify that extra ice cream in July.
Works Harder
Unprepared systems strain under sudden demand
Costs More
Higher energy bills from inefficient operation
Cools Less
Poor performance when you need it most
Change Your Filter (Yes, Again)
Your AC depends on airflow. A clogged filter = less airflow, frozen coils, and high bills.
  • Swap before summer heat kicks in.
  • MERV 8–12 works best for airflow and dust balance.
  • During wildfire smoke, check weekly.

Pro tip: If you run your fan on "circulate," expect to change filters more often.
Clean the Outdoor Unit (Condenser Coil)
Your outdoor unit is basically a giant radiator. Dirt, leaves, and cottonwood fluff choke it.
01
Hose Down Gently
Use garden hose with gentle spray (no power washers!)
02
Clear Vegetation
Remove weeds and grass within 2–3 feet
03
Straighten Fins
Use fin comb (cheap tool at hardware stores) for bent fins
Cleaner coils = easier heat dump = lower power bills.
Check Airflow Indoors & Seal Ductwork Leaks
Indoor Airflow Checklist
  • Open all supply vents—closing them to "save money" stresses the system.
  • Vacuum dust from registers and returns.
  • Ensure furniture isn't blocking vents.
Bonus: Run ceiling fans to help circulation—counterclockwise mode pushes cool air down.
Ductwork Leak Prevention
Leaky ducts lose 20–30% of cooled air before it hits your rooms.
  • Inspect visible ducts in basement/utility rooms.
  • Seal joints with foil tape (not duct tape).
  • Consider pro duct sealing if you've got comfort balance issues.
Check the Thermostat
  • Replace batteries now (not in July).
  • If you have a programmable or smart thermostat:
  • Set back temps during work hours.
  • Pre-cool before peak evening loads.
Pro hack: Every 1°C increase saves ~3–4% on cooling costs.
Shade & Insulate
Shade Outdoor Unit
Use shrubs or small awning (leave 2–3 feet clearance)
Block Sun Indoors
Close blinds/curtains on sunny windows
Upgrade Insulation
Add reflective film or blackout curtains. Attic insulation upgrades = massive summer and winter savings
Balance the System & Check Condensate Drain
Ever notice upstairs bedrooms swelter while the basement feels like Antarctica?
System Balancing
  • Adjust dampers on duct branches before summer—push more cool air upstairs.
  • Keep basement dampers partially closed, never fully.
  • Consider booster fans or zoning for stubborn homes.
Condensate Drain Maintenance
Your AC pulls humidity from the air. That water drains away—unless the drain line clogs.
  • Locate the small PVC drain near furnace.
  • Pour 1 cup vinegar down line to clear algae.
  • Check that drain exits freely outside or into floor drain.
Clogged drains = leaks and water damage.
Calgary-Specific Summer Stressors
Wildfire Smoke
Run fan on circulate with good filter. Replace filters more often.
Chinooks
Sudden swings mean AC may cycle oddly—normal, but keep filters clear.
Dry Air
Even in summer, Calgary stays dry—don't expect your AC to do much humidity removal.
DIY Quick Wins Checklist & When to Call a Pro
DIY Quick Wins Checklist
  • Replace filter
  • Hose outdoor coil
  • Clear 2–3 ft around condenser
  • Check & clear condensate drain
  • Adjust dampers for summer airflow
  • Program thermostat for savings
  • Close blinds on hot afternoons
When to Call a Pro
  • AC won't start or short cycles.
  • Ice forming on refrigerant lines or coils.
  • Warm air blowing despite thermostat calling for cooling.
  • Weird noises (buzzing, clicking, grinding).
  • Last maintenance visit was more than 2 years ago.
What the Pro Will Do
  • Check refrigerant charge with gauges.
  • Test capacitors, contactors, and wiring.
  • Measure airflow and static pressure.
  • Clean coils thoroughly (indoor + outdoor).
  • Verify temperature drop across coil.
Efficiency Myths Busted
  • Closing vents saves money actually stresses blower.
  • Bigger AC = better oversizing leads to humidity issues and short cycling.
  • Fans cool rooms they don't lower air temp, just help circulation.
Beat the Heat, Beat the Bill: AC efficiency is about airflow, clean coils, balanced ducts, and smart use. Spend an hour on prep, and you'll save every month all summer while staying comfortable.
Remember: Calgary summers may be short, but your energy bills don't have to spike. Prep now, chill later.
About HVACHELP.pro
HVACHELP.pro is dedicated to empowering Calgary homeowners with the knowledge and tools they need to maintain comfortable, energy-efficient homes. We provide honest, practical HVAC tips designed to save energy, reduce costs, and significantly extend the lifespan of your cooling and heating systems.
Explore our extensive library of resources, crafted to help you tackle common HVAC challenges and make informed decisions:
A step-by-step guide to troubleshooting common AC issues before deciding to call a professional technician.
Understand the sounds your AC makes and what they might indicate about its health or potential problems.
Visit HVACHELP.pro today for comprehensive seasonal HVAC prep guides, essential maintenance checklists, and proven cooling strategies that genuinely work in Calgary's unique climate.