Lo-Carbon Tempra



Through The Wall Mounted Heat Recovery Unit: Revolutionary patented technology; The Vent-Axia Lo-Carbon Tempra through the wall heat recovery units are suitable for fitting through a 102mm (4”) circular hole and are designed for use in bathrooms, toilets and utility areas. Under the new Building Regulations Document F continuous running products, such as the Lo-Carbon Tempra only need to move the amount of air as laid down in table 5.1a of Document F. The Vent-Axia Lo-Carbon Tempra is available with pullcord control, timer control or humidistat, timer and pullcord. All models are also available in SELV (Safety Extra Low Voltage).

Typical Installation: The Lo-Carbon Tempra unit is designed for installation in a 102mm (4”) core drilled hole. All installation can be carried out from inside the building. The units are suitable for external walls up to 318mm thick.


Easy installation and maintenance

With simple construction Tempra is both easy to fit in the same location as an existing 100mm diameter fan, and with easy access to the heat exchanger for maintenance. 


Product Specification

Complies with Building Regulations Part L 2010:
Low energy consumption means the Tempra exceeds the energy saving requirements in Part L, Conservation of Fuel and Power.

Versatile control:
Switching on/off or from trickle to boost speeds is possible in several ways: Switched Live, Pullcord or Humidistat. Overrun and delay start timers are also available.

Summer Setting:
The extract-only Summer Setting helps keep you cool by closing off the intake from outside, reducing the amount of warm air entering the dwelling.

Fits 100mm diameter hole:
The Tempra will fit 100mm through the wall applications as a straight replacement for a traditional extract fan.

Continuous or intermittent flow rates:
Air flows can be set to quiet, low speed continuous rates or high speed intermittent boost rates.

Low energy consumption, low noise:
The unique twin impeller design consumes as little as 2.0 Watts and operates almost silently on trickle setting.

Long Life ECDC Motor:
The units are fitted with a 24V ECDC motor with a state of the art built in power supply. This has the ability to operate at only 2 Watts power consumption on normal setting, offering a 90% energy saving over conventional AC equivalents




Apart from removing odours, providing fresh air and recovering heat, this appliance extracts airborne impurities such as dust, dirt and grease. These gradually build up and detract from the efficiency and appearance of the appliance. To ensure peak performance, the heat exchanger should be cleaned as required in accordance with the instructions supplied.




There are three means of mechanical ventilation specified in the Building Regulations: System 1, Intermittent Extract Fans, System 3, Continuous Mechanical Extract (MEV) and System 4, Continuous Mechanical Supply and Extract with Heat Recovery (MVHR).

System 1. Instead of using a traditional intermittent extract fan, the Tempra, running on continuous setting may be used. This method has the advantage of reducing the overall background ventilation requirement by 2500mm and removing the need for background ventilation in the room in which the unit is sited.

System 3. Using Tempra in conjunction with MEV/dMEV permits a reduction in the overall dwelling extract rate. This is particularly useful for extensions, loft conversions and refurbishments which might otherwise be difficult to ventilate.


There are no softwares available for download for this particular product.