Thermaflo “High Capacity JASR” Ventless Series Boiler Blow-Down Coolers are complete ventless systems packaged units that accept boiler blowdown and instantly condense the flash steam while cooling the boiler blowdown water for proper drainage at 140F. JASR High Capacity units consist of a ASME CODE Section VIII 150 PSIG fabricated heavy carbon steel venturi cooler section and cooling chamber assembly, self-acting type temperature regulator, pressure gauge and thermometer, with easy floor mounting legs for installation. The JASR Totally eliminates the expensive atmospheric vents required with standard blowdown flash separators and their install cost and eventual roof leaks and maintenance.