Hubbell J636 Hot Water Booster - 36 KW The Hubbell J636 is a heavy duty ASME Section VIII designed hot water booster heater. This machine is constructed with a stamped all stainless steel tank which does not require an internal tank lining. For improved appearance and longevity the Hubbell... MSRP: $7,135.00 Now: $3,795.83 Choose Options Compare 2 3 4 5 6 7 Compare Selected