Description

EcoAir OHRU HE-R

Heat Recovery Units with

Rotary Heat Exchanger

EcoAir OHRU HE-R is an autonomous module heat recovery ventilation unit, with implemented rotary

heat exchanger, automation and control system.

The unit is intended for wide project range with small volume and requirements for regular

fresh air supply bars, restaurants, night clubs, offices, banks, shops, workshops, showrooms,

smoking areas etc.

The EcoAir OHRU HE-R horizontal heat recovery units feature compact dimensions and easy

assembly. The rotary heat exchanger is made from aluminum sheets, alternatively plane and

corrugated. The result is a honey-comb structure in which pass both the fresh air and the

stale air flows. The exchanger surface, is porous and hygroscopic, and absorbs the humidity.

WORKING PRINCIPLE

One half of the rotary wheel is immersed in the stale air flow which (in winter conditions)

yields heat and humidity in the hygroscopic matrix; then, as a consequence of the rotation of

the wheel, the fresh air flows in the conducts, recovering both the heat and the humidity

(latent heat). The two fans are centrifugal type. The rotary exchanger recovers both the

sensible and the latent heat in winter conditions. So it’s possible to achieve peak efficiency

up to 90%. In summer conditions a part of the humidity contained in the inlet flow is ceded to

the expulsion flow, achieving analogous peak efficiency. Thanks to this high efficiency, the

fresh air in winter conditions can be directly introduced in air-conditioned rooms, without

installing post-heating sections.

With the fans working, it is possible to stop the heat exchanger rotation, with a “virtual

bypass”, that’s added for more efficient work of the unit between seasons.

CHARACTERISTICS

• An average 20 mm-thick layer of polyethylene and

polyester is installed in the unit to ensure

acoustic and heat insulation.

• Rotary, high efficiency heat exchanger with

hygroscopic surface. Air flows separation by special

gaskets. Induction motor with belt transmission to

the rotary heat exchanger.

• Induction motor-heat exchanger assembly easily

sideways removable.

• The dual intake centrifugal fans have statically and

dynamically balanced impellers to minimize vibrations

and noise. The electric motors used are directly coupled to the fans.

• Vibration absorbing supports to ensure low noise level.

• Standard EU4 efficiency filters, easily removable from the sides for periodical cleaning.

• The units are fitted with terminal boards to simplify the electrical connections, the fans and rotary

exchanger control.

For more information about this product click OHRU EcoAir HE R