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)
5015135038366
Humidistat
Yes
IP Rating
IPX4
MPN
403836
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
403836-product-manual
Vent-Axia Lo-Carbon Tempra 100mm (4") Heat Recovery Fan Longer Cell, Humidistat, Timer and Pullcord - 403836
SKU: 403836
You save: £159.98
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)
5015135038366
Humidistat
Yes
IP Rating
IPX4
MPN
403836
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
403836-product-manual
Product Information
The Tempra LHTP 403836 is a through-the-wall heat recovery ventilation unit designed to retrofit into existing 100 mm (4″) wall penetrations while providing advanced control features. It is the “longer cell” version—intended for wall thicknesses up to about 460 mm—making it suitable for thicker walls. The unit carries an IPX4 rating, making it suitable for installation in bathrooms, kitchens, or other moisture-prone spaces.
In terms of performance, the 403836 model provides both continuous trickle ventilation and a boost mode. The trickle settings are typically 6 l/s and 9 l/s, while the boost mode reaches up to 15 l/s when higher extraction is required (e.g. during showering). Its heat recovery system is capable of recovering up to around 78% of the thermal energy from the outgoing stale air, transferring that heat into the incoming fresh air to reduce heat loss and improve energy efficiency.
The “HTP” in LHTP reflects that the unit combines multiple control mechanisms: it integrates a humidistat, overrun timer, and pull-cord override. The humidistat allows the fan to boost automatically when humidity exceeds a preset level; the timer ensures continued extraction after activation for a controlled period; and the pullcord offers manual override where needed. Additional features include a “summer mode” (extract-only) setting to prevent overheating in warm months, low power consumption (as low as ~3.2 W on trickle), and quiet operation (≈ 20 dB(A) in trickle).
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 100mm (4") Heat Recovery Fan Longer Cell, Humidistat, Timer and Pullcord - 403836 (403836)