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Vent-Axia

Lo-Carbon Centra Humidistat Timer

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Prices and stock levels correct at the time of printing (18/12/14 8:00)

For bathroom/toilet applications, the continuous running HT model is automatically boosted by the built-in humidistat or by a switched live input which activates the adjustable timer (5-30 minutes). Datalogger as standard on all Lo-carbon humidity controlled Centra fans.

No: 442955A

Please call 0344 856 0590 for availability information

This product is part of the Lo-Carbon Centra range:

What is de-centralised MEV (dMEV)

Building Regulations Approved Document F gives examples of four main methods of ventilation. System 3, Continuous mechanical extract ventilation can be achieved using a single centralised extract unit such as the Sentinel Multivent ducted to ‘wet’ rooms (kitchen, bathroom, en-suite and WC) or by decentralised individual fans, such as the Lo-Carbon Centra in the ‘wet’ rooms. The fans run continuously at near silent levels providing a simple and effective form of ventilation.

SELV (Safety Extra Low Voltage) is designed for areas where a fan can be installed within Zone 1 in a room where there is a fixed bath or shower. Ingress Protected (IP) to IPX7 Lo-Carbon Centra SELV can be fitted safely within the spray area. The separate transformer can be mounted away from the spray zone and out of reach from the bath or shower.

The Lo-Carbon Centra meets the latest requirements of the Building Regulations Approved Document F for wholehouse system ventilation.

Selection of the two normal flow rates (6l/s or 9l/s) is via a simple ‘jumper’ on the control board. Different methods are available for operating boost speed from a simple switched live to integral humidistat or CO2 sensor. See individual models for further details.

The attractive and discreet styling of the Vent-Axia Lo-Carbon Centra will complement the décor of any new home while virtually silent operation ensures optimum ventilation is achieved without intrusive noise.

Lo-Carbon Centra
dMEV version recognised in SAP Appendix Q. Lo-Carbon Centra has a specific fan power of only 0.18 W/l/s in through-the-wall kitchen applications.

Installation & Operation



Click for more information about the range

Range Dimensions



Lo-Carbon Centra dMEV
Auto speed selection at installation. The integral air pressure sensor checks the airflow when first installed and also helps the fan to compensate for external wind pressure.
Stock Ref No: 441782
Lo-Carbon Centra Timer
Ideal for bathroom and toilet applications, this unit runs continuously on trickle setting and may be boosted by the switched live input which activates the adjustable timer (5-30 minutes).
Stock Ref No: 442954A
Lo-Carbon Centra Timer SELV
Ideal for bathroom and toilet applications, this unit runs continuously on trickle setting and may be boosted by the switched live input which activates the adjustable timer (5-30 minutes).
Stock Ref No: 443175
Lo-Carbon Centra Timer Pullcord
For bathroom/toilet applications, the continuous running TP model is boosted by the pullcord which activates the adjustable timer (5-30 minutes).
Stock Ref No: 447127
Lo-Carbon Centra Timer Pullcord SELV
For bathroom/toilet applications, the continuous running TP model is boosted by the pullcord which activates the adjustable timer (5-30 minutes).
Stock Ref No: 447128
Lo-Carbon Centra Humidistat Timer
For bathroom/toilet applications, the continuous running HT model is automatically boosted by the built-in humidistat or by a switched live input which activates the adjustable timer (5-30 minutes). Datalogger as standard on all Lo-carbon humidity controlled Centra fans.
Stock Ref No: 442955A
Please call 0344 856 0590 for
further availability information.
Lo-Carbon Centra Humidistat Timer SELV
For bathroom/toilet applications, the continuous running HT model is automatically boosted by the built-in humidistat or by a switched live input which activates the adjustable timer (5-30 minutes). Datalogger as standard on all Lo-carbon humidity controlled Centra fans.
Stock Ref No: 443176
Lo-Carbon Centra Humidistat Timer with pullcord
For bathroom/toilet applications, the continuous running HTP model is automatically boosted by the built-in humidistat or by the pullcord which activates the adjustable timer (5-30 minutes). Datalogger as standard.
Stock Ref No: 443045
Lo-Carbon Centra Humidistat Timer with pullcord SELV
For bathroom/toilet applications, the continuous running HTP model is automatically boosted by the built-in humidistat or by the pullcord which activates he adjustable timer (5-30 minutes). Datalogger as standard.
Stock Ref No: 443177
Lo-Carbon Centra CO2
Continuous running, automatically boosted with integral CO2 and humidistat sensor. Ambient response feature - detects rapid change in %RH and boosts immediately, or will boost slowly and proportionally with %RH or CO2. Datalogger as standard.
Stock Ref No: 444672A
Please call 0344 856 0590 for
further availability information.
100mm Wall Fitting Kits (Brown)
100mm Wall Fitting Kits in Brown
Stock Ref No: 254100
100mm Wall Fitting Kits (White)
100mm Wall Fitting Kits (White) For installing into most walls using the telescopic liners supplied.
Stock Ref No: 254102
150mm to 100mm diameter adaptor for Centra
An adaptor which allows the Centra fan to be mounted over a 150mm diameter wall sleeve. Ideal for use where a 150mm kitchen fan is being replaced with a Centra fan.
Stock Ref No: 443334
Easy Fix 100mm Window Fitting Kit for Centra, Silent Fan and the Silhouette 100
Window kit available for use in single or sealed double glazing and where sunstrate is up to 40mm thick. A simple to install window kit manufactured from durable ABS and compatable with Centra, the Silent Fan or the Silhouette 100 Will accommodate 110mm - 140mm diameter Galzing hole.
Stock Ref No: 442947
Ceiling adaptor for Centra
The ceiling adaptor enables the Centra fan to be mounted on ceiling where there is limited space within the ceiling void. The adaptor effectively reduces the length of the spigot by 45mm. This then provides a 70mm spigot length for connection of the ducting and installation into the celing void.
Stock Ref No: 443800

Downloads for the Lo-Carbon Centra range


Vent-Axia are leading manufacturers and suppliers of heating, ventilation and air conditioning systems, both in the UK and around the world. For over 75 years, we have led the industry in air ventilation products, systems and services. Whatever your requirement, budget or setting, Vent-Axia can provide the solution you need. From extraction fans for the home to large commercial ventilation solutions, our wide HVAC range features a product for every air handling purpose.

Vent-Axia's popular Lo Carbon range combines all the style and durability you expect from a Vent-Axia product with even greater energy efficiency, helping you to make your property as eco friendly as possible. Together with the Lo Carbon range, demand energy recovery ventilation and heat recovery (HRV) and mechanical extract systems are also available to aid new sustainable building projects to adhere to the Code for Sustainable Homes.

In combination with our exceptional ventilation product range we also offer a comprehensive range of heating products ideal to heat your home, our range of electric heating includes, storage heaters and combination storage heaters,  panel heaters, towel rails, portable heating, fan heaters, convector heaters and radiant heating.  Our latest product introduction brings electric underfloor heating to the portfolio, this range consists of electric underfloor heating mats, underfloor heating thermostats, underfloor heating kits and underfloor heating insulation boards to offer a comprehensive solution.

In addition to our ever-growing domestic and commercial ventilation ranges, Vent-Axia also supply air curtains, hand dryer products and fume handling/smoke fans. We can also support your air conditioning requirements.

Vent-Axia products are available from distributors around the UK and Ireland and also around the world via our network of international distributors. Many of our ranges can also be ordered via our online store. Browse our full range of heating, ventilation and air conditioning products by clicking here. You can also contact us for any further enquiries.