> For the complete documentation index, see [llms.txt](https://docs.betterbuilding.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.betterbuilding.io/user-guide/workflows/energy-efficiency/advanced-hvac/outdoor-air-reset-based-controls.md).

# Outdoor air reset-based controls

Outdoor Air Reset is a control strategy that adjusts the temperature of the supplied fluid (chilled water/heating hot water, etc) based on the outdoor air temperature. This strategy can be a more energy-efficient approach than a simple fixed supply temperature strategy.

Advanced HVAC enables Outdoor Air Reset controls on Hot Water Loops and Chilled Water Loops (I.e. to control Boilers, Air Source Heat Pumps and Chillers).

{% hint style="success" %}
Model Outdoor Air Reset controls on a Hot Water Loop by selecting ‘Hot Water Loop’ settings and then the 'Setpoint Manager'. Next, select the 'Outdoor Air Reset' option under 'Set Point Manager Type' and then nominate the setpoints and outdoor air temperatures for your desired control strategy. Hit 'Update, then 'Save'. 
{% endhint %}

<figure><img src="/files/gxUuJYKrzoOhkI3qB5c8" alt=""><figcaption></figcaption></figure>


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