Vent-Axia 444370 Lo-Carbon Tempra HTP SELV Heat Recovery Unit with Humidistat, Timer & Pullcord
Vent-Axia 444370 Lo-Carbon Tempra HTP SELV Heat Recovery Unit with Humidistat, Timer & Pullcord
The Vent-Axia 444370 Lo-Carbon Tempra HTP SELV Heat Recovery Unit is a compact, energy-efficient through-the-wall ventilation system designed to improve indoor air quality, control excess humidity and minimise heat loss. Featuring Safety Extra Low Voltage (SELV) operation, an integrated humidistat, overrun timer and pullcord control, this decentralised mechanical ventilation with heat recovery (dMVHR) unit is ideal for bathrooms, kitchens, toilets and utility rooms.
Designed to fit a standard 100mm diameter wall opening, the Lo-Carbon Tempra HTP SELV provides an effective upgrade from conventional extractor fans, particularly in residential refurbishment and social housing projects. Its high-efficiency heat exchanger recovers up to 78% of heat from extracted air, helping maintain comfortable indoor temperatures while reducing energy consumption.
Key Features
- Safety Extra Low Voltage (SELV): Extra-low-voltage design for installations requiring SELV ventilation equipment.
- Integrated Humidistat: Automatically responds to increased humidity levels, helping reduce condensation and excess moisture.
- Overrun Timer: Allows extraction to continue after activation, helping remove lingering moisture, odours and stale air.
- Pullcord Control: Convenient manual operation allows additional ventilation when required.
- Up to 78% Heat Recovery: Efficient heat exchanger recovers warmth from outgoing air, helping minimise ventilation-related heat loss.
- Continuous Ventilation: Selectable extraction rates of 6 l/s or 9 l/s, with boost extraction up to 15 l/s.
- Low Energy Consumption: Efficient Lo-Carbon EC/DC motor consumes as little as 3.2W at trickle speed.
- Quiet Operation: Low-noise performance of approximately 20dB(A) at the lowest operating setting.
- Compact 100mm Installation: Fits standard 100mm diameter wall openings, making it suitable for replacing conventional extractor fans.
- Summer Extract Mode: Manual extract-only setting helps prevent unwanted heat recovery during warmer weather.
- IPX4 Rated: Splash-resistant construction for suitable bathroom and utility room installations.
- Efficient Airflow Design: Maintains slight negative pressure to help prevent humid air from spreading into adjoining rooms.
- Easy Maintenance: Accessible heat exchanger simplifies routine cleaning and servicing.
Efficient Heat Recovery Ventilation
The Vent-Axia Lo-Carbon Tempra HTP SELV uses an integrated heat exchanger to transfer warmth from outgoing stale air to incoming fresh air. With temperature efficiency of up to 78%, the system helps minimise unnecessary heat loss while maintaining effective ventilation and improving indoor air quality.
The unit can be configured for continuous extraction at 6 l/s or 9 l/s, with a boost extraction rate of 15 l/s when additional ventilation is required. For intermittent extraction applications, the unit can operate at 15 l/s.
Its airflow arrangement maintains slight negative pressure within the ventilated room, helping reduce the movement of humid air into adjoining spaces. This makes it particularly useful for managing moisture and condensation in bathrooms, kitchens and utility rooms.
Automatic Humidity Control with Timer and Pullcord
The Vent-Axia 444370 Tempra HTP SELV combines three practical ventilation controls to provide flexible operation and effective moisture management.
- Built-in Humidistat: Detects increased humidity and automatically activates additional extraction to help reduce condensation and moisture build-up.
- Overrun Timer: Keeps the ventilation operating after the activation signal has ended, allowing additional time to remove humid air and unwanted odours.
- Pullcord Control: Enables convenient manual activation of ventilation when required.
These combined functions make the Tempra HTP SELV particularly suitable for bathrooms, shower rooms and utility areas where humidity levels can fluctuate throughout the day.
SELV Operation for Suitable Bathroom Installations
The Safety Extra Low Voltage configuration makes the Tempra HTP SELV suitable for applications where extra-low-voltage ventilation equipment is specified. This provides additional installation flexibility in moisture-prone environments, subject to the manufacturer's installation instructions and applicable electrical regulations.
Its IPX4 rating provides protection against splashing water, making it suitable for appropriately specified bathroom and utility room installations.
Low-Energy and Quiet Performance
Equipped with a high-efficiency Lo-Carbon EC/DC motor and twin impellers, the Tempra HTP SELV consumes as little as 3.2 watts at its lowest continuous extraction setting. This energy-efficient design helps minimise running costs in applications requiring regular or continuous ventilation.
With operating noise levels as low as 20dB(A), the unit delivers discreet ventilation while helping maintain a comfortable and peaceful indoor environment.
Ideal Applications
- Bathrooms and shower rooms requiring humidity-controlled ventilation
- Toilets and WC facilities
- Domestic kitchens requiring extract ventilation
- Utility rooms and laundry areas
- Social housing and residential properties
- Home renovation and refurbishment projects
- Replacement of existing 100mm wall-mounted extractor fans
- Installations requiring SELV heat recovery ventilation
- Properties requiring automatic humidity control with timer and manual operation
Technical Specifications
- Manufacturer: Vent-Axia
- Product Code: 444370
- Product Range: Lo-Carbon Tempra
- Model: HTP SELV – Humidistat, Timer and Pullcord
- Ventilation Type: Decentralised Mechanical Ventilation with Heat Recovery (dMVHR)
- Electrical Design: Safety Extra Low Voltage (SELV)
- Installation Type: Through-the-wall
- Duct Connection Size: 100mm diameter
- Heat Recovery Efficiency: Up to 78%
- Continuous Extraction Rate: 6 l/s or 9 l/s
- Boost Extraction Rate: 15 l/s
- Minimum Power Consumption: 3.2W
- Noise Level: As low as 20dB(A)
- Motor Type: Lo-Carbon EC/DC with twin impellers
- Humidity Control: Integrated humidistat
- Timer Function: Overrun timer
- Manual Control: Pullcord
- Summer Mode: Manual extract-only operation
- IP Rating: IPX4
- Applications: Bathrooms, kitchens, toilets and utility rooms
Simple Installation and Maintenance
The Vent-Axia 444370 Tempra HTP SELV is designed for straightforward installation through an external wall using a standard 100mm diameter opening. Its compact heat exchanger design allows the unit to replace many conventional 100mm extractor fans while delivering the additional benefits of heat recovery ventilation.
The Lo-Carbon Tempra range is available with standard 320mm and extended 460mm cell lengths to accommodate different wall thicknesses. The appropriate model should be selected according to the installation requirements.
Its straightforward construction provides convenient access to the heat exchanger for routine cleaning and maintenance, helping maintain efficient airflow and reliable performance over time.
The Lo-Carbon Tempra range is designed to meet the performance requirements for continuous extract ventilation under Building Regulations Approved Document F, subject to correct installation and system configuration. SELV electrical connections must be installed in accordance with the manufacturer's instructions and applicable electrical regulations.