# Calculators for Fluid Heaters

## Power Calculators

Calculate the power required in Kilowatts (Kw) to maintain water temperature using the flow rate in gallons or liters per minute (gpm or lpm) and temperature change required in degrees Centigrade (ºC) or Fahrenheit (ºF).

Flow Rate (GPM)

Temperature Change Required (ºC)

Kw

Flow Rate (LPM)

Temperature Change Required (ºC)

Kw

Flow Rate (GPM)

Temperature Change Required (ºF)

Kw

Volume of water (Gal)

Temperature Change Required (ºC)

Time of Heating (Mins)

Kw

## Time Calculators

Calculates the heating time in minutes (Mins) using the volume of water (Gal), the temperature change required in degrees Centigrade (ºC) or Fahrenheit (ºF), and the power available in Kilowatts (Kw).

Volume of Water (Gal)

Temperature Change Required (ºC)

Power Available (Kw)

Mins

Volume of Water (Gal)

Temperature Change Required (ºF)

Power Available (Kw)

Mins

## Temperature Calculator

Calculate the temperature change in degrees Centigrade (ºC) using the power available in Kilowatts (Kw), the heating time in minutes (Mins), and volume of water in gallons (Gal).

Power available (Kw)

Time of heating (Mins)

Volume of Water (Gal)

ºC

## References & Definitions

### H2O Properties

1 gallon = 231 in³ = 0.1337 ft³ = 3.785L

1 gallon = 8.337 lbs.

1 ft³ = 62.4 lbs. (at 20°C)

Specific heat = 1 calorie/gram-°C(at 15°C)

Specific heat = 1 BTU/lb.-°F (at 15°C)

Specific weight = 8.337 lbs./gallonheat of vaporization = 965 BTU/lb.

### Abbreviations

KW = Killowatts

Gal = Gallons

In = Inches

Mins = Minutes

SpH = Specific Heat of Solution

SpW = Specific Weight of solution

ΔT°F = Change in degrees Fahrenheit

ΔT°C = Change in degrees Centigrade

### Equivalents

1 in = 2.54 cm = 25.4 mm = 0.083ft

1 cm = 0.3937 in = 0.0328 ft.

1 in³= 16.39 cm³

1 BTU = 0.2933 watt-hrs

1 KW-Hr = 3412 BTU

### Ohm’s Laws

Volts = Amperes x Ohms

Watts = (Amperes)² x Ohms

Amperes = Watts / Volts

Amperes/Phase =(Watts / Volts) x 0.578