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RTU’s and DDC <br />RTU’s are identified on the Non-Fleet Capital Replacement Program <br /> <br />Pneumatic Controls need to be replaced as part of this project <br /> <br />ASHRAE – American Society of Heating, Refrigerating, and Air- <br />Conditioning Engineers Life Expectancies <br />•Roof Top Units – 15-20 Years <br />•Pneumatic Controls – 20 Years