Knowledge centre
The calculations and concepts behind choosing a heater or a fan.
Calculating heat output
Kcal/h = V × Δt × K. Divide by 860 for the output in kW.
Calculating ventilation airflow
Volume × air changes per hour = airflow in m³/h.
Direct, indirect or infrared
Where the combustion gases go decides the choice.
Drying out after water damage
Close the space, add gentle heat and keep the air moving.
Which heater for which site?
Open shell and building site: direct fired. Closed shell, marquee or storage: indirect. Workstation or terrace: infrared.
Diesel, gas or electric: what does heating really cost?
Allow roughly 0.1 litre of diesel or 0.08 kg of gas per kW per hour; electric units consume exactly their rated output.
Choosing a dehumidifier: how many litres a day?
Allow about 1 litre per 24 hours for every 10 m³ in normal drying, and double that after water damage or on fresh screed.
Buying a building dryer: what to look for and what it costs
Choose on capacity in l/24 h, power draw and build quality. A professional unit of 30 to 90 l/24 h covers most sites.