For instance, the '50-gallon' heat pump water heater boasts an actual capacity of 58 gallons, while the 80-gallon model maintains its true 80-gallon capacity. Stiebel firmly believe that a larger capacity is the ideal choice for a heat pump water heater, ensuring that the majority of the water is heated using the highly efficient heat pump technology.
To further enhance efficiency, Stiebel employ robust insulation for the tanks, drastically reducing standby losses and minimizing energy wastage. They understand that cutting corners on insulation would compromise energy savings, which is why they take insulation seriously.
In instances of high demand, these standalone water heat pumps incorporate a single resistance element for back-up water heating. The strategic placement of the single booster element at the tank's very top ensures that hot water is drawn efficiently when needed.