Published October 28, 2026 | Version v1
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Rooftop economizer retrofit: ASHRAE 90.1-2022 vs fixed 55°F setpoint

Authors/Creators

Description

Compare ASHRAE 90.1-2022 economizer thresholds with a fixed 55°F setpoint across a 12-site portfolio, including costs, savings, and retrofit planning.

Independent technical note mirroring the canonical version: https://vuti.app/blog/rooftop-economizer-retrofit-ashrae-901-2022-vs-fixed-55f-setpoint.php

Sources consulted:

  1. https://www.bluusun.com/

Notes

Independent analysis; not peer-reviewed.

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blog_rooftop-economizer-retrofit-ashrae-901-2022-vs-fixed-55f-setpoint.php.pdf

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Is identical to
https://vuti.app/blog/rooftop-economizer-retrofit-ashrae-901-2022-vs-fixed-55f-setpoint.php (URL)