Externally, GEA Multi-MAXX HD are almost exactly identical to the GEA HN models. Both are available with design panels or in functional industrial versions - and the dimensions of HD sizes 1 to 4 conform to the standard.

A look inside, however, shows the big differences. A diagonal fan really puts on the air pressure with HD models. With dimensions comparable to its brother models, this powerful fan offers higher air ratings, greater air-projection distances, and enhanced heat input. The model »Benjamin« outputs approx. 1000 m³/h, and its most powerful brother offers no less than 12,000 m³/h.

The heating output of HD models ranges up to over 120 kW, depending on ambient and medium temperatures.

A comparison with HN models reveals: only the voluminous HN models in size 5 (for which there is no counterpart in the HD range) are able to outdo this performance – and only by a hair in air-performance ratings.

Summary of HD features:

• Four model sizes
• Three heat-exchanger variants
• Two fan variants
• Three air outlets for wall installation
• Seven air outlets for ceiling installation
• Design or industrial enclosures