GlobalTowne is almost out of stock on the Bosch GWH425EF LP (Liquid Propane) Gas Tankless Water Heater. The Bosch 425EF LP is a direct vent tankless water heater designed for 1 major application at a time up to 3.6 GPM. The Bosch 425EF LP requires power and has electronic ignition and a built in fan for blowing the exhaust gases to the outside. This 425 should be vented horizontal to the outside using 4" diameter single wall stainless steel venting. This Bosch model 425EF LP is also the direct replacement for the older Bosch 125FX LP. Supply is limited so order soon.