Circular roof hood intended for outdoor air and extract air. The hood is designed for location above the roof with or without a roof through connection. The air runs both on the top- and downside of the hood. This is valid both for outdoor
and extract air. The hood is free-draining downwards.
Can also be supplied with a pest-proof mesh.
NOTE! When fans are not running there is always a risk for drifting snow and damp to penetrate into ducts. At some occasions also condensation can cause trouble.
H is manufactured as standard from galvanised steel sheet Z275, but is also available in stainless acid-resistant steel 2343 or painted.
H in dimensions 100 – 315 has a sleeve connection as standard and fits on the outside of ventilation ducts.
Dimensions 400 – 1250 are supplied with flange connection (including counter-flange) as standard. They are also supplied with twistable lifting and anchoring eyelets. An individual anchoring eyelet must not be subjected to forces in
excess of 1 500 N.
All dimensions can also be obtained with connections that fit directly to the roof through connection TGR.

Ventilation hood for exhaust air above roof, suitable for both industrial and comfort ventilation. The air is ejected in an upwards-directed jet. This avoids contaminating the air in the vicinity of the hood, and soiling of the area around the hood. The ejection is so effective that you can install a fresh air inlet in the immediate vicinity of the hood, without any special precautions.

NOTE! When fans are not running there is always a risk for drifting snow and damp to penetrate into ducts. At some occasions also condensation can cause trouble.

The hood is made of galvanised sheet steel, and can also be supplied in other materials such as stainless steel sheet 1.4301, stainless acid-resistant steel sheet 1.4404, and painted in various colours, to special order. It has a net over the opening and an internal rain funnel to collect rainwater and snow, which is drained out of the hood through a hose. The hose can withstand temperatures of between -45 and +65 °C.

To avoid damage to the net in the opening the hood is supplied with transport protection. This must be removed before the hood is taken into service.

The hood is delivered with lifting and anchoring loops. A single wire-loop shall not be exposed for forces exceeding 1500 N.

The hood is delivered with a flange connection and an opposing flange with matching properties to be used when installing the hood. Note that other products may have other flanges with other properties and may not fit. Always specify the flanch properties properly if the hood should fit a flange other than the supplied opposing flange.

Ventilation hood for exhaust air above roof, suitable for both industrial and comfort ventilation. The air is ejected in an upwards-directed jet. This avoids contaminating the air in the vicinity of the hood, and soiling of the area around the hood. The ejection is so effective that you can install a fresh air inlet in the immediate vicinity of the hood, without any special precautions.

NOTE! When fans are not running there is always a risk for drifting snow and damp to penetrate into ducts. At some occasions also condensation can cause trouble.

The hood is made of galvanised sheet steel, and can also be supplied in other materials such as stainless steel sheet 1.4301, stainless acid-resistant steel sheet 1.4404, and painted in various colours, to special order. It has a net over the opening and an internal rain funnel to collect rainwater and snow, which is drained out of the hood through a hose. The hose can withstand temperatures of between -45 and +65 °C.

The hood has a female connection, which fits outside a ventilation duct.

As special delivery the hood can be supplied with three anchoring wire-loops. It is standard on Ø400.

For exhaust air above roof.

Provided with a female connection which fits outside a ventilation duct.

Circular roof hood with angled upper side intended for outdoor air and extract air. The hood is designed for location above the roof with or without a roof through connection. The air runs both on the top- and downside of the hood. This is valid both for outdoor and extract air. The hood is free-draining downwards. Can also be supplied with a pest-proof mesh.

NOTE! When fans are not running there is always a risk for drifting snow and damp to penetrate into ducts. At some occasions also condensation can cause trouble.

HV is manufactured as standard from galvanised steel plate Z275, but is also available in stainless steel sheet 1.4301, stainless acid-resistant steel sheet 1.4404 or painted.

HV is available with different angles in order to be in harmony with the architectural design of the building.

HV in dimensions 100 – 315 has a sleeve connection as standard and fits on the outside of ventilation ducts.

Dimensions 400 – 1250 are supplied with flange connection (including counter-flange) as standard. They are also supplied with twistable lifting and anchoring eyelets. An individual anchoring eyelet must not be subjected to forces in excess of 1 500 N.

All dimensions can also be obtained with connections that fit directly to the roof through connection TGR.

Roof hood VH is constructed as outdoor air inlet for both industrial and comfort ventilation, but can also be used as exhaust air hood.

The hood is made of galvanized steel sheet, but can on order also be delivered in other materials like stainless steel, aluminium and powder painted sheet metal in different colours. It is provided with net and sleeve, which secures an effective protection against rain, falling leaves etc.

The standard design is with a coupling connection, but the hood can on order be delivered with flange or connection as desired.

VH can also be delivered in intermediate dimensions.

Note:

When used as an air inlet hood it is recommended that the velocity in the connection duct is kept below 5 m/s in order to aviod water to be dragged in.

The VHL lamella hood is developed specially to achieve an architectally correct ending of air intake and outlet on the roof.

The lamella hood is as standard delivered in galvanised design, can also be delivered in black powder coating.

In order to achieve a harmonic transition from duct to hood, the connection to the hood can be choosen either as a duct or as a roof transition (e.g. GISOL or GISOLP) with its dimensions corresponding to ØD, below the roof the duct may be reduced to Ød1 (see mounting proposal 1).

The lamella hood can well also be mounted directly on a duct with the diameter Ød1 (see mounting proposal 2).

When connecting to the roof through connection TGR, the special transition piece TGR-VHL must be used.

The VHP hood is developed specially to achieve an architectally correct ending of air intake and outlet on the roof. The hood is as standard delivered in galvanised design, can also be delivered in grey VHPG, or other colours.