The economics of a tankless water heater is that it uses no energy when it is not supplying hot water. With a circulating pump it would have to be on most of the time or there would be no hot water to circulate. To cut down on water usage you place the tankless water heater near to use point.
 Instant On Demand Propane Gas Tankless Hot Water Heater Whole House 10L 27 GPM  US $230.89
|
 Instant On Demand RV Camper Tankless Hot Water Heater Propane Gas 16L 43 GPM US $326.65
|