(Study) Unlock 33% Energy Savings with Zoning: The Data Speaks for Itself
ZONEFIRST
1/14/2025
A 2009 study conducted by Ontario's Independent Electricity System Operator (IESO) revealed a game-changing insight into HVAC systems: zoning can reduce energy use by 33%. Whether you're retrofitting an existing system or designing a new build, incorporating zoning could be one of the smartest moves you make.
By using dampers, thermostats, and advanced controls, zoning directs airflow to specific areas rather than running the entire HVAC system to condition the whole house. Think of it this way: if you’re only using your upstairs bedrooms at night, why cool the downstairs during peak hours? Zoning eliminates that waste by sending air only where it’s needed, when it’s needed.
The Data: Zoning Reduces Energy Consumption by 33%
The IESO study monitored six houses: three with zoning systems and three without. Over 24 hours, the difference in energy use was clear:
ZONED HOMES
12.9 kWh/day
NON-ZONED HOMES
19.3 kWh/day
That’s a 33% reduction in energy usage. For homeowners, this translates to lower energy bills. For contractors and builders, this is a feature worth promoting to clients looking for long-term savings.
Zoning Reduces Peak Load Stress
One of the most critical findings from the study was how zoning impacts peak electricity demand. HVAC systems in zoned homes shifted their energy usage to off-peak hours (e.g., pre-cooling the upstairs at night). During on-peak hours, when electricity costs are highest, zoned systems required significantly less energy.
Here’s why this matters:
- For Homeowners: Lower electricity bills by avoiding peak-time usage.
- For Builders and Contractors: Selling homes with zoned HVAC systems provides clients with a cost-effective and grid-friendly solution.
Why Zoning Is a Win-Win Solution
- Uneven Heating and Cooling: No more complaints about the upstairs being too hot or the basement feeling like a freezer. Zoning customizes comfort for each area.
- Energy Efficiency: With zoning, you avoid conditioning spaces that aren’t being used, which means less wear and tear on HVAC systems and lower energy usage overall.
- Future-Proofing: With energy costs on the rise, zoning is a way to build homes or retrofit existing ones to be more efficient and attractive to buyers.
Calculate your Energy Savings & ROI with our Zoning Energy Savings Calculator
Calculate Your Savings NowPractical Advice for Implementing Zoning
As a contractor (or homeowner), you know that zoning requires a bit of upfront work, but the payoff is worth it. Here are the basics to keep in mind:
- Choose the Right Equipment: Look for HVAC systems compatible with zoning. Many newer systems are designed with zoning in mind.
- Plan Your Zones Thoughtfully: Consider how the home is used. Bedrooms, living areas, and basements often function best as separate zones.
- Install Smart Thermostats: These allow for automated control, making it even easier to optimize energy usage.
- Sell the Benefits to Clients: If you’re a contractor or builder, show homeowners the data—33% savings is a powerful selling point.
Conclusion: The Case for Zoning Is Clear
The IESO study shows zoning isn’t just a theoretical solution—it’s a proven method to save energy and money while improving comfort. Zoning is an upgrade worth considering if you're a homeowner, or recommending if you're a HVAC contractor or builder.
By incorporating zoning into your projects, you’re not just installing a system—you’re providing a smarter, more efficient, and future-ready solution.
Whether it’s for your own home or a client’s project, zoning is a feature that delivers value today and tomorrow. Don’t leave savings on the table—start zoning today.