Vent-Axia Multivent Continuous Ventilation Kit

Multivent Installation Manual

Many questions relating to installation and configuration can be answered by consulting the installation manual:
Multivent Installation Manual Download

The unit is powered by a single, high efficiency motor (572 m3/hr) that is designed to extract air from 3 different locations (125mm duct diameter), typically this would be from ‘wet’ rooms such as a bathroom or kitchen. Basically any area that contributes to introducing moisture laden air into the home. This air is extracted from a terminating 150mm diameter duct outlet. A weatherproof external vent is provided.

Note this unit does not supply fresh air – instead replacement air is designed to enter the home through windows and other gaps.

The slow ‘trickle’ rate of extraction is designed to continuously move air around the property, at such a low level that is not really noticed. This air is replaced naturally via gaps around doors, windows. The automatic ‘continuous’ humidity sensing ability will ensure the unit speeds up when required. The end result is a fairly automated, continuous approach to ventilation. Drawing only 85 watts at full speed and considerably less on lower speeds, the fan is also energy efficient.

Note the motor included is highly specific for this application. As well as having multiple outlets, it has been engineered to withstand max pressure of 810 Pascals. A regular inline fan typically offers max pressure rates of between 2-300 pascals. In simple terms, this unit is really well suited for multiple extraction points and will experience less pressure loss vs putting a system together with an inline fan and Y junctions.

Digital Display with Automatic and Manual Control Options

Included is a digital display, with the ability to adjust 4 speeds (low, normal, boost, purge) to 1% increments of the maximum fan speed. The unit also includes an integrated humidity sensor with adjustable threshold, which increases fan speed in proportion to the level of humidity detected. The unit shall also automatically raise the humidity threshold set point as temperature decreases in order to prevent unnecessary boosting due to background humidity.