Through its official Amazon storefront, Camplux is offering its 18kW Electric Tankless Water Heater at $239.99 shipped. This unit would normally cost you $350 at full price, with discounts often keeping prices above $280, aside from the one previous drop to the $240 low at the end of summer. Today’s deal is cutting $110 off the going rate, giving you a second chance at the lowest price we have tracked.