BULAC1000 / AC1000 TUBE COOL ASSEMBLY 1/4" INDUSTRIAL Climate Control Assemblies For Use With Compressors: Adjustable Cool Valve cools incoming air by as much as 30°F. Use AC1000 assembly with the CC20 and the Series 88VX™ respirator. Use with starter breathing supply hose. Adjustable Hot/Cool Valve: Hot/cold tube cools or warms incoming air by as much as 30°F Use HC2400 assembly with the CC20 and the Series 88VX™ respirator. Use with starter breathing supply hose. For Use With Ambient Air Pumps: Ftigitron Cool Valve cools low pressure incoming air by as much as 20°F when used with ADP20 and EDP30 Free-Air® pumps. Use Frigitron 2000 assembly with the CC20 and the Series 88VX™ respirator. Use with V20 Series breathing supply hose. Made in USA.