The TTR400D is the performance model of the TTR range.
Compared with the conventional TTR400 model, the "D" unit features Trotec's advanced Duoventic air volume regulation.
This advanced control of the electronics allow a stepless, separate adjustment of the moisture content and volume flow of the required dry air.

The TTR Trisorp Dual principle of operation works with two separate air circuits for a pressure-tolerant re circulation mode for power-saving dehumidification at an increased drying rate.
Compared to the "outdoor air" supplying the regeneration air, in contrast to conventional through-air operation, up to 30 °C lower dew point temperatures can be achieved with the TTR 400 D for a nominal dry air volume. Therefore, dew points far below 0 °C can be achieved, which results in considerably lower drying stages and in considerably more energy-efficient operation!

Standard on the TTR400D is an integrated DIN socket which allows for remote switching control of the TTR400D by using an optional hygrostat, time clock or other external switching devices with matching DIN plug. Also a range of TTR accessories are available including hose or pipe connections that can be connected to the regeneration air inlet on the TTR400D as well as different filters for separate air supply.

The TTR400D is suitable for commercial and industrial applications, for protection against condensation in waterworks and pump stations, for anti-corrosion, sandblasting and corrosion protection work as well as for applications in the building industry. It is also suitable for flood restoration in low temperature climates.