Abstract: The invention relates to a ventilating and heating apparatus for rooms of particularly high headrooms. It comprises one or more air-heating units and one or more room heating units. A feature of the apparatus is that the room is equipped with ventilating openings directed to the sojourn space of the room, injecting in summer and drawing in winter as well as with ventilating openings directed to the space under the ceiling, injecting in winter and drawing in summer.

Abstract: An air distributor has a connecting pipe and a baffle spaced from the mouth of this pipe while a crown of vanes is disposed between the baffle and the pipe mouth.

Abstract: A flow duct for the delivery of air for ventilation is of round cross section and is surrounded by a prismatic casing over the length of the duct. Sound-absorbing material is filled into the space between the casing and the duct and varies in radial thickness around the periphery of the duct as measured in a plane perpendicular to the axis thereof.

Abstract: The invention relates to a sound-absorbing radiating screen. One side of the screen is coated with a heat-insulating material, whereas on the other side perforations of optional shape are formed. The entire curve, or a part thereof, formed by the edge limiting the rims of the openings lay outside the unperforated surface of the plate of the screen.The sound-absorbing capacity of the radiating screen is increased and at the same time, the punching and perforation does not impede or interrupt the heat flow in the screen.

Abstract: The invention relates to a suction-mixing head to be used advantageously in each case when by means of high-energy- primary liquid or gas, secondary medium running to the multiple of the primary flowing medium shall be sucked and mixed to the primary flowing medium, to liquid or gas.The suction and mixing head consists of sectional pipe of optionally arched generatrix and of pressure stub connecting thereto. The sectional pipe may be open at both ends or closed at one end and therein deflecting insert may be arranged depending on the application field, which determines the flow path.The suction-mixing head operating at the swirl principle is essentially an injector, under the effect of the vacuum arising in the swirl core of the head the mixing takes place and the mixture discharges parallelly to the axle of the said swirl from the mixing space of the sectional pipe to be developed as a cone.