The basic model incubator uses three light bulbs as a heater element. A special add-on was developed for hospitals that can not count on electricity for 24 hours a day. This add-on allows for the heating via a warm-water circuit. A stove and a well-insulated kettle are placed outside the incubator room and connected to the incubator inside with hoses. The extra weight is more than 100 kg. 2 litres of paraffin a day are needed for continuous operation without electricity.

The incubator consumes 150 Watt per hour. The warm water kettle is provided with additional connectors for the possible connection of warm water solar collectors. Other methods to acquire the needed energy are possible, for example through solar cells and/or running a generator for a few hours per day to warm the incubator with accumulators and lamps.