20 Energy Efficiency Tips to Save on Your HVAC Utility Bills

Your heating and cooling system accounts for nearly half of your home’s energy usage, making it the largest contributor to your monthly utility bills. The good news? Small changes in how you use and maintain your HVAC system can lead to significant savings throughout the year.

At HEP Inc., we help homeowners maximize their energy efficiency while maintaining optimal comfort. These proven strategies can reduce your HVAC energy costs by 10-40% without sacrificing the comfort your family deserves.

HVAC
HVAC

Thermostat Optimization Strategies

The 7-Degree Rule

The Strategy: Adjust your thermostat 7-10 degrees when you’re away from home

Summer: Set to 85°F when away, 78°F when home

Winter: Set to 68°F when home, 58-62°F when away

Savings: Up to 10% on your annual heating and cooling costs

Why it works: Your HVAC system doesn’t have to work harder to “catch up” when you return. The energy saved during the hours you’re away far exceeds the energy used to restore comfort.

Use Programmable Thermostat Schedules

The Setup:

    • Weekdays: Lower/higher temps during work hours
    • Weekends: Adjust for different sleep and activity schedules
    • Seasonal: Modify schedules as daylight hours change

Advanced Tip: Smart thermostats can learn your schedule automatically and make adjustments based on occupancy sensors and smartphone location.

Optimize Sleep Settings

Summer: Set to 82-85°F while sleeping (use fans for comfort) Winter: Set to 65-68°F while sleeping (layer blankets for warmth) Savings: 6-8% for each degree of adjustment during 8-hour periods

Air Circulation and Ventilation Tips

Maximize Ceiling Fan Efficiency

Summer Strategy:

    • Run fans counterclockwise to push air down
    • Set thermostat 4°F higher while using fans
    • Turn fans off when leaving rooms (fans cool people, not rooms)

Winter Strategy:

    • Run fans clockwise on low speed to circulate warm air
    • Push warm air down from ceiling level

Energy Impact: Proper fan use can make you feel comfortable at higher summer temperatures and lower winter temperatures.

Ensure Proper Airflow Throughout Your Home

Quick Wins:

    • Keep all vents open and unobstructed
    • Move furniture away from supply and return vents
    • Clean vent covers monthly to remove dust buildup
    • Ensure interior doors remain open for proper air circulation

Why it matters: Blocked vents create pressure imbalances that force your system to work harder and less efficiently.

Utilize Natural Ventilation

Cool Season Strategy:

    • Open windows during mild weather instead of using AC
    • Use window fans to pull cool air in at night
    • Close windows and blinds before temperatures rise

Shoulder Season Benefits: Take advantage of pleasant outdoor temperatures to give your HVAC system a break.

Maintenance for Maximum Efficiency

Change Air Filters Regularly

Standard Filters: Every 1-2 months

High-Efficiency Filters: Every 3 months

Homes with Pets/Allergies: Monthly or more frequently

Cost vs. Savings: A $15 filter change can prevent hundreds in energy waste and repair costs.

Keep Your Outdoor Unit Clean

Monthly Tasks:

    • Remove debris, leaves, and grass clippings
    • Maintain 2 feet of clearance around the unit
    • Trim nearby vegetation
    • Gently rinse the unit with a hose (avoid high pressure)

Impact: A dirty outdoor unit can reduce efficiency by 10-15%.

Schedule Annual Professional Maintenance

What Professionals Do:

    • Clean evaporator and condenser coils
    • Check refrigerant levels
    • Inspect and tighten electrical connections
    • Calibrate thermostat accuracy
    • Test system performance and efficiency

Home Insulation and Sealing

Seal Air Leaks

Priority Areas:

    • Around windows and doors
    • Electrical outlets on exterior walls
    • Where plumbing or wiring enters the home
    • Attic access points
    • Basement rim joists

DIY Solution: Use caulk, weatherstripping, or foam sealant to close gaps

Professional Solution: Whole-home air sealing and blower door testing

Upgrade Insulation Where Needed

High-Impact Areas:

    • Attic insulation (R-38 to R-60 depending on climate)
    • Basement or crawl space insulation
    • Ductwork insulation in unconditioned spaces

Quick Check: If you can see floor joists in your attic, you likely need more insulation.

Install Storm Doors and Windows

Energy Impact: Can reduce heating and cooling costs by 10-15%

Best Options: Low-E glass with argon gas fill for maximum efficiency

Budget Alternative: Window films and draft stoppers provide some benefits at lower cost

Smart Usage Habits

Minimize Heat-Generating Activities During Hot Days

High-Heat Activities to Avoid:

    • Using the oven or clothes dryer during afternoon hours
    • Running the dishwasher during peak heat
    • Leaving electronics and lights on unnecessarily

Smart Timing: Schedule heat-generating activities for early morning or evening hours.

Use Window Coverings Strategically

Summer:

    • Close blinds and curtains on south and west-facing windows during the day
    • Use light-colored window treatments to reflect heat

Winter:

    • Open curtains on sunny days to let solar heat in
    • Close all window coverings at night for insulation

Investment: Cellular shades can reduce heat loss through windows by up to 40%.

Optimize Your Water Heater

Temperature Setting: Set to 120°F (many come factory-set at 140°F)

Insulation: Wrap older water heaters with insulation blankets

Location Impact: Water heaters in conditioned spaces reduce load on HVAC systems

Advanced Efficiency Strategies

Consider Zoning Your HVAC System

How it Works: Motorized dampers control airflow to different areas

Benefits: Heat and cool only occupied areas

Savings: 20-30% reduction in energy usage for larger homes

Upgrade to a Programmable or Smart Thermostat

Programmable Thermostats: Save 10-15% through automatic scheduling

Smart Thermostats: Additional savings through learning algorithms and remote access

Advanced Features: Geofencing, weather integration, and energy reports

Improve Ductwork Efficiency

Professional Duct Sealing: Can improve efficiency by 15-20% Duct Insulation: Prevents energy loss in unconditioned spaces Proper Sizing: Ensures optimal airflow and system performance

Seasonal Efficiency Tips

Spring Preparation

    • Schedule professional maintenance
    • Replace filters after winter operation
    • Clear your outdoor unit of winter debris
    • Test the system operation before peak season

Summer Efficiency

    • Set thermostats to 78°F or higher when home
    • Use fans to increase comfort at higher temperatures
    • Keep blinds closed during peak sun hours
    • Avoid heat-generating activities during hot afternoons

Fall Transition

    • Clean outdoor unit before heating season
    • Switch ceiling fans to a clockwise rotation
    • Check and seal any new air leaks
    • Adjust thermostat schedules for shorter days

Winter Savings

    • Set thermostats to 68°F or lower when home
    • Use space heaters efficiently in frequently occupied rooms
    • Ensure heating vents aren’t blocked by furniture
    • Open curtains during sunny days for solar heat gain

When to Consider System Upgrades

Sometimes the best efficiency improvement is upgrading old equipment:

Replace if Your System is:

    • Over 15 years old
    • Requiring frequent repairs
    • Using outdated refrigerant (R-22)
    • Struggling to maintain comfortable temperatures

Modern Efficiency Benefits:

    • SEER ratings up to 25+ (older systems often 8-10 SEER)
    • Variable speed technology for precise comfort
    • Smart integration and advanced controls

Start Saving Today

Don’t wait for your next high utility bill to take action. Start with simple changes like adjusting your thermostat and changing your filter, then work toward more comprehensive improvements. Or visit https://hephvac.com to speak with a team member about options on energy efficient units for your home.

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