V = Volume: Length x Width x Height (m³).

T = Is the difference between external and internal needed temperature.

K = Coefficient of loss heat according to the standard of insulation in your building.

K = 0,6 - 0,9
Good insulation: double wall, insulating ceiling material, insulating wall and floor material, double-glazed windows and insulated doors.

K = 1,0 - 1,9
Reasonable insulation: double wall, insulating ceiling material and few windows with single glasses.

K = 2,0 - 2,9
Fair insulation: simple walls with glazed parts and non insulated roof.

K = 3,0 - 4,0
Little or no insulation: wood covers, plate or plastic materials.

480x34x4 = 65.280 kcal/h

Heating Power
1 kW = 860,61 kcal/h
1 kW = 3.415,18 BTU/h
1 kcal/h = 3,97 BTU/h

Temperature
°F = 9/5 x °C + 32
°K = °C + 273,15

Capacity
1 l = 0,2641 Gallon
1 l = 0,22 Gallon (UK)

Pressure
1 bar = 14,504 PSI
1 bar = 105 Pa
1 mm H₂0 = 9,806 Pa

Dimensions
1 mm = 0,03937 Inches
1 mm = 0,00328 Feet

Weight
1 kg = 35,274 Ounces
1 kg = 2,205 Pounds

Surface
1 m² = 1.550,03 Inches²
1 m² = 10,764 Feet²

Flow
1 l/h = 0,2641Gallon/h
1 l/h = 0,22 Gallon (UK)/h