Details
Applicable Area
Bathroom, Toilet
Collection Name
Lo-Carbon Tempra
Domestic/Commercial
Domestic, Commercial
Duct Diameter
105mm
Extraction Rate
15L/s
Extractor Fan Type
Heat Recovery
Fan Diameter
4 Inch
Finish/Colour
White
GTIN (Barcode)
5015135038373
Humidistat
Yes
IP Rating
IPX4
MPN
403837
Mounting Options
Wall
Max Noise Level
22dB
Number of Speeds
3
Power Consumption
5.7W
Pull Cord
Yes
Timer
Yes
Voltage
240V
Dimensions
Depth
117mm
Height
266mm
Width
190mm
Downloads
403837-product-manual
Vent-Axia Lo-Carbon Tempra SELV 100mm (4") Heat Recovery Fan Longer Cell, Humidistat, Timer, and Pullcord - 403837
SKU: 403837
You save: £179.98
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| 10+ | £352.76 | Save 2% |
| 20+ | £345.56 | Save 4% |
| 30+ | £338.36 | Save 6% |
Details
Applicable Area
Bathroom, Toilet
Collection Name
Lo-Carbon Tempra
Domestic/Commercial
Domestic, Commercial
Duct Diameter
105mm
Extraction Rate
15L/s
Extractor Fan Type
Heat Recovery
Fan Diameter
4 Inch
Finish/Colour
White
GTIN (Barcode)
5015135038373
Humidistat
Yes
IP Rating
IPX4
MPN
403837
Mounting Options
Wall
Max Noise Level
22dB
Number of Speeds
3
Power Consumption
5.7W
Pull Cord
Yes
Timer
Yes
Voltage
240V
Dimensions
Depth
117mm
Height
266mm
Width
190mm
Downloads
403837-product-manual
Product Information
This model is part of the Lo-Carbon Tempra range by Vent‑Axia, designed as a through-the-wall heat recovery unit that fits into a standard 100 mm diameter hole—making it ideal for retrofit applications in bathrooms, kitchens, toilets or utility rooms. It is the “Longer Cell” (LHTP) version, meaning it accommodates thicker wall sections (between 321 mm and 460 mm) thanks to its extended cell and installation depth options.
In terms of functionality, the 403837 model offers a combination of humidistat, timer and pull-cord control, allowing the fan to run on a baseline continuous trickle and then boost when higher extraction is required (e.g., when humidity rises or the pull-cord is activated). Its heat recovery performance is up to around 78% efficiency, helping capture and reuse warmth from extracted air so that incoming fresh air is pre‐warmed, reducing heat loss and energy consumption.
From the installation and performance side, it is IPX4 rated (suitable for wet areas) and draws as little as ~3.2 W on its trickle setting. The continuous mode trickle is typically around 6 l/s (≈21.6 m³/h) with a higher trickle of 9 l/s and a boost mode up to 15 l/s (≈54 m³/h) depending on settings and installation.
Delivery Information
Free Delivery on All Orders Over £50.
This Excludes Delivery to the Scottish Highlands, Offshore Islands and Northern Ireland.
For more information, please see our Delivery details.
Vent-Axia Lo-Carbon Tempra SELV 100mm (4") Heat Recovery Fan Longer Cell, Humidistat, Timer, and Pullcord - 403837 (403837)