Vent-Axia 444369 Lo-Carbon Tempra T SELV Heat Recovery Unit with Timer
The Vent-Axia 444369 Lo-Carbon Tempra T SELV Heat Recovery Unit is a compact, energy-efficient through-the-wall ventilation system designed to improve indoor air quality while reducing heat loss. Featuring Safety Extra Low Voltage (SELV) operation, an integrated overrun timer and a low-energy EC/DC motor, this decentralised mechanical ventilation with heat recovery (dMVHR) unit provides an effective solution for bathrooms, kitchens, toilets and utility rooms.
Designed to fit a standard 100mm diameter wall opening, the Lo-Carbon Tempra T SELV is particularly suitable for residential refurbishment, social housing and extractor fan replacement projects. Its integrated heat exchanger achieves up to 78% temperature efficiency, recovering warmth from outgoing air to help maintain comfortable indoor temperatures and reduce ventilation-related energy consumption.
Key Features
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Safety Extra Low Voltage (SELV): Extra-low-voltage design for installations requiring SELV ventilation equipment.
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Integrated Overrun Timer: Allows extraction to continue after activation, helping remove residual moisture, odours and stale air.
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Up to 78% Heat Recovery: Efficient heat exchanger recovers warmth from extracted air, helping minimise ventilation-related heat loss.
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Continuous Ventilation: Selectable extraction rates of 6 l/s or 9 l/s, with boost extraction up to 15 l/s.
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Low Energy Consumption: Efficient Lo-Carbon EC/DC motor consumes as little as 3.2W at trickle speed.
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Quiet Operation: Low-noise performance of approximately 20dB(A) at the lowest operating setting.
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Compact 100mm Installation: Fits standard 100mm diameter wall openings, making it suitable for replacing conventional extractor fans.
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Summer Extract Mode: Manual extract-only setting helps prevent unwanted heat recovery during warmer weather.
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IPX4 Rated: Splash-resistant construction for suitable bathroom and utility room installations.
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Efficient Airflow Design: Maintains slight negative pressure to help prevent humid air from spreading into adjoining rooms.
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Easy Maintenance: Accessible heat exchanger simplifies routine cleaning and servicing.
Energy-Efficient Heat Recovery Ventilation
The Vent-Axia Lo-Carbon Tempra T 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 reduce 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.
Convenient Timer-Controlled Ventilation
The Vent-Axia 444369 Tempra T SELV features an integrated overrun timer that allows the unit to continue extracting air after the activation signal has ended. This provides additional ventilation to help remove lingering humidity, unwanted odours and stale air.
The timer-controlled operation is particularly beneficial in bathrooms, toilets and other moisture-prone areas where continued extraction can help improve indoor air quality and reduce condensation.
SELV Operation for Suitable Bathroom Installations
The Safety Extra Low Voltage configuration makes the Tempra T 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 T 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
- 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 timer-controlled ventilation
Technical Specifications
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Manufacturer: Vent-Axia
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Product Code: 444369
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Product Range: Lo-Carbon Tempra
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Model: T SELV – Timer
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Ventilation Type: Decentralised Mechanical Ventilation with Heat Recovery (dMVHR)
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Electrical Design: Safety Extra Low Voltage (SELV)
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Installation Type: Through-the-wall
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Duct Connection Size: 100mm diameter
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Heat Recovery Efficiency: Up to 78%
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Continuous Extraction Rate: 6 l/s or 9 l/s
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Boost Extraction Rate: 15 l/s
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Minimum Power Consumption: 3.2W
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Noise Level: As low as 20dB(A)
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Motor Type: Lo-Carbon EC/DC with twin impellers
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Control Type: Overrun timer
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Summer Mode: Manual extract-only operation
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IP Rating: IPX4
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Applications: Bathrooms, kitchens, toilets and utility rooms
Simple Installation and Maintenance
The Vent-Axia 444369 Tempra T 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.
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