Technical toolbox

HVAC calculators.

Choose a tool, check the units and assumptions, and compare the result with the worked example.

Convert heating or cooling capacity from BTU per hour to kilowatts.

Convert thermal power in kilowatts to kilocalories per hour.

Convert volumetric airflow from m³/h to m³/s and litres per second.

Convert volumetric flow from cubic metres per hour to litres per second.

Convert litres per second to cubic metres per hour.

Estimate fan shaft power from volumetric airflow, total pressure and efficiency.

Estimate pump shaft power for water from flow, head and pump efficiency.

Estimate water flow from cooling capacity and supply/return temperature difference.

Estimate sensible heat transfer from airflow and temperature difference.

Find the absolute difference between two temperatures.

Estimate transferred cooling capacity from measured water flow and temperature difference.

Estimate airflow needed to transfer a sensible heat load at a chosen temperature difference.