Water Heater Efficiency Calculator

Formula

The formula to calculate the Water Heater Efficiency is:

\[ Ewh = \frac{m \cdot C \cdot \Delta T}{Q} \times 100 \]

Where:

\(Ewh\) is the Water Heater Efficiency (%)
\(m\) is the mass of the water (kg)
\(C\) is the specific heat of water (4.186 J/kg°C)
\(\Delta T\) is the change in temperature (°C)
\(Q\) is the total energy input into the water heater (J)

What is Water Heater Efficiency?

Water Heater Efficiency refers to the ratio of useful energy output to the total energy input. It indicates how effectively a water heater converts energy into heating the water. A higher efficiency means less energy is wasted, resulting in lower energy costs and reduced environmental impact.

Example Calculation

Let's assume the following values:

Mass of Water (m) = 50 kg
Change in Temperature (ΔT) = 30 °C
Total Energy Input (Q) = 700000 J

Using the formula:

\[ Ewh = \frac{50 \cdot 4.186 \cdot 30}{700000} \times 100 \approx \frac{6279}{700000} \times 100 \approx 0.897 \% \]

The Water Heater Efficiency is approximately 0.897%.