Air curtain installation types
A key factor in the correct sizing and specification of an air curtain is the building situation. Depending on the pressure conditions inside the building, two different air curtain installation types are used: IDW installation with an internally rotating air roll, or ADW installation with an externally rotating air roll.
Within these two installation types, different housing types allow the air curtain system to be adapted to the specific building and installation conditions.
Internally rotating air roll (IDW)
With IDW installation, air is drawn in from the room side and discharged directly above the door. This creates an air roll that rotates towards the room. IDW installation generally requires less heating capacity than ADW installation because the air is drawn in from the room side.
Preferred applications: For buildings with balanced or positive internal pressure, and for smaller and medium-sized buildings where there are no permanent workstations in the immediate door area.
For pressure equilibrium or positive pressure in the building
For low to moderate wind loads
In enclosed rows of shops, wind-protected locations or entrances with a vestibule
Externally rotating air roll (ADW)
With ADW installation, the air intake is positioned above the door and the air discharge nozzle is located on the room side. This creates an air roll that rotates outwards, counteracting the incoming cold air. As a result, separation performance is significantly improved and air movement in the entrance area is reduced.
Because the intake area is exposed to lower temperatures, ADW installation requires a higher heating output than the IDW variant. A frost protection thermostat must also be provided.
Preferred applications: For buildings with negative internal pressure, as well as multi-storey or large buildings.
For negative pressure in the building
For regular wind loads or other challenging building conditions.
Numerous housing types
Depending on the building situation and project requirements, Teddington air curtains are available in a wide range of housing types. These include units for exposed wall or ceiling installation, recessed or suspended-ceiling installation, horizontal or vertical installation and other configurations for different building situations.
Housing type S
Visible horizontal installation, air intake at the front.
Housing type U
For visible or suspended-ceiling installation, with the underside of the unit visible and air intake from below. Optionally available with a ceiling installation frame.
Housing type UDB
Recessed ceiling installation, flush with the ceiling, with air intake from below. The entire underside of the unit remains visible.
Housing type Z
Recessed ceiling installation with air intake from below. Only the air intake and air discharge openings are visible.
Housing type ZS
Suspended-ceiling installation with the air intake area inside the ceiling void. Only the air discharge opening is visible.
Housing type S-V
Visible vertical installation, air intake at the front.
Housing type R-V
Slim design for visible vertical installation, air intake from the rear.
Housing type RZ-V
Slim design for space-saving vertical installation in the wall. Only the air discharge opening is visible.
Housing type RC
Slim, flat-surfaced design for visible horizontal installation, air intake from above.
Housing type R
Slim design for visible horizontal installation, air intake from above.
Housing type RZ
Slim design for space-saving installation in the suspended ceiling. Only the air discharge opening is visible.
The combination of two air curtain units provides near-complete protection against the ingress of outside and cold air, while reducing thermal energy consumption by 30 to 40% compared with the conventional use of a single air curtain unit.
Air curtain systems for vestibules
At high-traffic building entrances, uncontrolled airflows are common. These are intensified by external wind pressure, thermal buoyancy and pressure changes caused by air-conditioning and ventilation systems inside the building.
Double-door systems are often used as vestibules, but they are only effective if the two doors close alternately. In practice, this effect is lost if door opening intervals are too long or the vestibule depth is too shallow. The result is that both doors can remain open at the same time, allowing increased cold air ingress and causing uncomfortable draughts as well as additional heating demand.
To support the function of a vestibule when both doors are open, Teddington can combine an ambient air curtain at the outer door with a heated air curtain at the inner door.
The ambient air curtain at the outer door helps to reduce the effects of wind and cold air ingress. The downstream heated air curtain counteracts the remaining incoming air and helps to reduce draughts in the entrance area. Together, the two air curtains can provide effective air separation even when both vestibule doors are open at the same time.
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- Air discharge system: CONVERGO® pressure chamber nozzle system
- Air discharge range:
- Mounting position:
- Application:
- Shape:
- Heating options:
- Sound insulation:
- Unit length: Custom unit lengths available
- Fan type: AC