If you dry out spaces regularly, buying is usually cheaper than hiring: a professional building dryer often pays for itself within a few weeks of use. Start with capacity: allow about 1 litre per 24 hours per 10 m³ for normal drying, and double that after water damage or on fresh screed.
Mind the difference between a household dehumidifier and a building dryer. A building dryer has a metal housing, an impact-resistant rolling frame, an hour counter for per-site billing and automatic defrost so it keeps running at lower temperatures.
Power draw is usually between 0.5 and 1.5 kW. A 1 kW unit running around the clock uses roughly 24 kWh a day. That is modest against the time saved: a floor that is dry a week earlier lets the next contractor start sooner.
Pick a model with hose drainage if the unit has to run unattended for days; a few-litre tank fills within half a day during intensive drying.
Always combine the dryer with air circulation and some added heat. Dryer, fan and heater together usually halve the drying time — our range also includes ready-made drypacks for exactly that.