Rooftop economizer retrofit: ASHRAE 90.1-2022 vs fixed 55°F setpoint

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: https://www.bluusun.com/

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-10-28
DOI
https://doi.org/10.5281/zenodo.23723551
Primary Topic
Building Energy and Comfort Optimization
Type
preprint
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preprint

Rooftop economizer retrofit: ASHRAE 90.1-2022 vs fixed 55°F setpoint

Lars Bergstrom
1 links
Zenodo (CERN European Organization for Nuclear Research)
Building Energy and Comfort Optimization
preprint

Rooftop economizer retrofit: ASHRAE 90.1-2022 vs fixed 55°F setpoint

Lars Bergstrom
preprint en

Abstract

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: https://www.bluusun.com/

Zenodo (CERN European Organization for Nuclear Research)
Climate action, Affordable and clean energy
Building Energy and Comfort Optimization
DOIOpen Access PDFOpenAlex
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Rooftop economizer retrofit: ASHRAE 90.1-2022 vs fixed 55°F setpoint — Lars Bergstrom · Zenodo (CERN European Organization for Nuclear Research) (2026) | TGRS Research Map | TGRS