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Kittitas County Detention Center <br />Figure 3-2 White Roll Roofing <br />3.2 MECHANICAL SYSTEMS <br />3.2.1 Heating, Ventilation, and Air Conditioning Systems <br />The detention center annex is serviced by a roof -mounted heat recovery unit (HRU) (see Figure <br />3-3) with three supply ducts: one gas -fired and heated in three stages, one neutral, and one <br />cooled duct. The HRU is scheduled to be replaced with the pending detention center upgrades. <br />The detention center is serviced by two air handling units (AHU) in the basement (see Figure 3- <br />4). The detention center chilled water is supplied by pumps (see Figure 3-5) and an air-cooled <br />chiller (see Figure 3-6). The detention center is supplied by three Rheem 120-gallon, 400 MBTU <br />heating water boilers installed in 2017 in the basement, all in good condition. The annex is served <br />by two AO Smith 120-gallon, 300 MBTU heating water boilers, both in good condition. The <br />detention center is fully integrated into a Building Automation System (BAS); however, it is not <br />set up for optimal performance. The detention center electrical service also feeds the four rooftop <br />AHUs serving the second floor of the courthouse. Any work done to improve energy usage of <br />the courthouse AHUs will lead to a reduction in the detention center's energy consumption. <br />Project Number 22-084 <br />October 28, 2025 <br />