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Kittitas County Courthouse Energy Audit <br />1 1 1 ;� r'' <br />v� <br />Figure 3-3 Typical Windows <br />3.2 MECHANICAL SYSTEMS <br />3.2.1 Heating, Ventilation, and Air Conditioning Systems <br />The courthouse is serviced by mini -split systems (see Figure 3-4 and Figure 3-5) and five rooftop <br />air handling units (AHU) providing outside air into the building. The thermostats for the <br />courthouse that are linked to mini -split units are programmable; however, they are not being <br />programmed for optimal performance. Many AHU thermostats are not programmable. The <br />rooftop AHUs that serve the second floor of the courthouse are electrically fed by the detention <br />center electrical service (see Figure 3-6). This leads to energy usage attributed to the courthouse <br />to be lower than expected, and any work done to the AHUs to improve energy usage will lead to <br />detention center energy consumption being reduced. The northwest part of the first floor uses a <br />combination light fixture/air diffuser, which may be space efficient, but is not energy -efficient. <br />Domestic hot water for the courthouse is provided by two Rheem 100-gallon, 200 MBTU hot <br />water boilers in the basement. Both are in fair condition. <br />Figure 3-4 Interior Mini -Split <br />Project Number 22-084 <br />October 28, 2025 <br />