What if your boiler could think ahead — adjusting its output based on the weather outside? That’s the promise of outdoor reset, a simple yet powerful strategy that’s transforming how commercial buildings manage heating efficiency.

Outdoor reset is a control strategy that adjusts boiler water temperature based on outdoor air temperature. Instead of maintaining a constant setpoint year-round, the system lowers supply temperatures during milder weather and increases them during colder months. This dynamic approach ensures the boiler operates only as hard as needed, reducing energy consumption and improving efficiency.

Why It Works

Traditional boiler systems often run at fixed temperatures — typically between 160°F and 180°F — regardless of actual heating demand. This results in wasted energy, especially during shoulder seasons when full heating capacity isn’t necessary.

Outdoor reset solves this by tailoring boiler output to real-time conditions, allowing systems to operate at lower loads more frequently. This not only saves energy but also enhances comfort. Spaces remain at the desired temperature without overheating, and building occupants benefit from consistent climate control.

Real-World Impact

According to industry data, facility owners can save up to 3% in energy costs for every degree the thermostat is adjusted via outdoor reset. Over time, these savings add up — especially in large commercial buildings with significant heating loads.

Outdoor reset also contributes to ESG (Environmental, Social, and Governance) goals by lowering carbon emissions. Since commercial buildings account for over 40% of global greenhouse emissions, even small efficiency gains can have a big environmental impact.

Who Benefits Most?

• Facility Managers: Gain better control over heating systems and reduce utility bills.
• Consulting Engineers: Can design smarter systems that meet performance and sustainability benchmarks.
• Mechanical Contractors: Benefit from easier system commissioning and fewer callbacks.
• General Contractors: Deliver buildings with lower operating costs and higher client satisfaction.
• Building Owners: See improved ROI through reduced fuel usage and maintenance costs.