Exhaust ventilation pipes

Given the prevailing conditions in the Nordic countries, an insulated sewer ventilation pipe model should always be used. Only an insulated sewer ventilation pipe prevents the condensation of humidity in the sewer and the accumulation of ice in the pipes. It the pipes freeze, sewer ventilation will not work, which may lead to the emptying of water seals and cause a bad smell inside the building.

We do not recommend placing a cowl on top of a sewer ventilation pipe. However, a cowl can be used if the intention is to make the sewer pipe look the same as the other pipes on a roof. If a cowl is used, the rain collar inside the cowl should be removed in order to improve ventilation.

To avoid freezing, we recommend the insulated VILPE 110/ER/500 ventilation pipe for sewer ventilation. Uninsulated sewer pipes can be insulated later by mounting the VILPE Freeze cover on top of the pipe.

Yes, VILPE ventilation pipes can also be used to ventilate roof structures, and where necessary, roof ventilation can be improved using a ventilation pipe. When ventilation pipes are used to ventilate roof structures, it must be ensured that any water condensing onto the pipe walls is directed to a place where it does not cause damage to the building’s structures. This can be done, for example, by placing a plastic container of an approximately 1 litre capacity under the ventilation pipe in order to collect and evaporate the water produced by condensation.

In many cases, a range hood with an internal blower can be replaced with a range hood which requires an external blower, thereby converting the exhaust pipe into a roof fan. This makes the kitchen much quieter.

If there is a need to convert an exhaust pipe into a roof fan, we recommend that the exhaust pipe be completely replaced with a VILPE roof fan. The whole package is then ready for operation without the need for additional testing or separate wiring. Waterproofing can only be ensured by means of a readymade component.

The cowl of the most widely used ventilation exhaust pipe, the Ø 125 mm pipe, can be replaced with the VILPE S series VILPE E120S roof fan. The cowl of the exhaust pipe is removed and replaced by a fan that is attached to the exhaust pipe from its lower part with three screws.

Converting an exhaust pipe of Ø 160 mm into a roof fan using the VILPE E220S fan is slightly more difficult, because in addition to removing the cowl, the plastic cone-shaped air deflector between the exhaust pipe and the cowl must also be removed.

It must be noted that in the case of conversions, a separate pass-through must also be provided in the roof for the fan’s electric wire. According to fire regulations, electric wires cannot be directed to the controller via the duct system. In many cases, a hole is made in the plastic pass-through for the electric wire, and the gaps are then sealed using a cable pass-through and sealing mass.

NOTE! Electrical installations in connection with changes and installations may only be carried out by professional electricians.

The lower pressure drop in FLOW products reduces the power consumption of the ventilation unit. In addition, the roof fans in the series are EC-controlled and have a service switch.

FLOW products have:

• State-of-the-art water separation
• Up to 40 percent less pressure loss (for exhaust pipes) compared to older models
• Modern design