{"product_id":"vent-axia-403835-lo-carbon-tempra-selv-lt-heat-recovery-unit-longer-cell-timer","title":"Vent-Axia 403835 Lo-Carbon Tempra SELV LT Heat Recovery Unit Longer Cell \u0026 Timer","description":"\u003ch4\u003eVent-Axia 403835 Lo-Carbon Tempra SELV LT Heat Recovery Unit – Long Cell with Timer\u003c\/h4\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eVent-Axia 403835 Lo-Carbon Tempra SELV LT Heat Recovery Unit\u003c\/strong\u003e is a compact, energy-efficient through-the-wall ventilation system designed to improve indoor air quality while reducing heat loss. Featuring \u003cstrong\u003eSafety Extra Low Voltage (SELV) operation, a 460mm long cell and an overrun timer\u003c\/strong\u003e, this decentralised mechanical ventilation with heat recovery (dMVHR) unit is ideal for bathrooms, kitchens, toilets and utility rooms in residential properties and social housing.\u003c\/p\u003e\n\n\u003cp\u003eDesigned to fit an existing 100mm diameter wall opening, the Tempra SELV LT provides an effective upgrade from conventional extractor fans. Its integrated heat exchanger achieves up to 78% temperature efficiency, recovering warmth from extracted air to help maintain comfortable indoor temperatures and reduce energy consumption.\u003c\/p\u003e\n\n\u003ch5\u003eKey Features\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSELV Design:\u003c\/strong\u003e Safety Extra Low Voltage configuration for installations requiring extra-low-voltage ventilation equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverrun Timer:\u003c\/strong\u003e Timer-controlled ventilation allows extraction to continue after activation, helping remove residual moisture and stale air.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat Recovery Efficiency:\u003c\/strong\u003e Recovers up to 78% of heat from outgoing air to help minimise heat loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended 460mm Cell:\u003c\/strong\u003e Suitable for external wall thicknesses between 321mm and 460mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Ventilation:\u003c\/strong\u003e Selectable extraction rates of 6 l\/s or 9 l\/s, with boost extraction up to 15 l\/s.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnergy-Efficient Motor:\u003c\/strong\u003e Lo-Carbon EC\/DC motor consumes as little as 3.2W at trickle speed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuiet Operation:\u003c\/strong\u003e Low-noise performance of approximately 20dB(A) at the lowest operating setting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100mm Wall Installation:\u003c\/strong\u003e Compact design fits standard 100mm diameter wall openings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSummer Extract Mode:\u003c\/strong\u003e Manual extract-only setting helps prevent unwanted heat recovery during warmer weather.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIPX4 Rated:\u003c\/strong\u003e Splash-resistant design for suitable bathroom and utility room installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Maintenance:\u003c\/strong\u003e Accessible heat exchanger simplifies routine cleaning and servicing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eEnergy-Efficient Heat Recovery Ventilation\u003c\/h5\u003e\n\u003cp\u003eThe Vent-Axia Lo-Carbon Tempra SELV LT uses an integrated heat exchanger to recover heat from outgoing stale air and transfer it to incoming fresh air. With temperature efficiency of up to 78%, the system helps reduce ventilation-related heat loss while maintaining a consistent supply of fresh air.\u003c\/p\u003e\n\n\u003cp\u003eThe unit can be configured for continuous extraction at 6 l\/s or 9 l\/s, with a boost rate of 15 l\/s when increased ventilation is required. For intermittent extraction applications, the unit can operate at 15 l\/s.\u003c\/p\u003e\n\n\u003cp\u003eIts airflow arrangement maintains slight negative pressure within the ventilated room, helping prevent humid air from spreading into adjoining areas. This makes it particularly useful for controlling condensation and moisture in bathrooms, kitchens and utility rooms.\u003c\/p\u003e\n\n\u003ch5\u003eConvenient Timer-Controlled Ventilation\u003c\/h5\u003e\n\u003cp\u003eThe integrated \u003cstrong\u003eoverrun timer\u003c\/strong\u003e allows the Vent-Axia 403835 to continue extracting air after the activation signal has ended. This provides additional ventilation to help remove lingering moisture, odours and stale air, making the unit particularly practical for bathrooms and toilets.\u003c\/p\u003e\n\n\u003cp\u003eCombined with its SELV design, the timer-equipped configuration provides an efficient ventilation solution for suitable domestic and refurbishment applications.\u003c\/p\u003e\n\n\u003ch5\u003eLow-Energy and Quiet Performance\u003c\/h5\u003e\n\u003cp\u003eEquipped with a high-efficiency Lo-Carbon EC\/DC motor and twin impellers, the Tempra SELV LT consumes as little as 3.2 watts at its lowest continuous extraction setting. This low-energy operation makes it suitable for applications requiring regular or continuous ventilation.\u003c\/p\u003e\n\n\u003cp\u003eOperating at sound levels as low as 20dB(A), the unit delivers discreet ventilation while helping maintain a comfortable indoor environment.\u003c\/p\u003e\n\n\u003ch5\u003eIdeal Applications\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eBathrooms and shower rooms\u003c\/li\u003e\n\u003cli\u003eToilets and WC facilities\u003c\/li\u003e\n\u003cli\u003eDomestic kitchens requiring extract ventilation\u003c\/li\u003e\n\u003cli\u003eUtility rooms and laundry areas\u003c\/li\u003e\n\u003cli\u003eSocial housing and residential developments\u003c\/li\u003e\n\u003cli\u003eProperty refurbishment and renovation projects\u003c\/li\u003e\n\u003cli\u003eReplacement of existing 100mm wall-mounted extractor fans\u003c\/li\u003e\n\u003cli\u003eInstallations requiring SELV ventilation with timer control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eTechnical Specifications\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Vent-Axia\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Code:\u003c\/strong\u003e 403835\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Range:\u003c\/strong\u003e Lo-Carbon Tempra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e SELV LT – Long Cell with Timer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVentilation Type:\u003c\/strong\u003e Decentralised Mechanical Ventilation with Heat Recovery (dMVHR)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical Design:\u003c\/strong\u003e Safety Extra Low Voltage (SELV)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Type:\u003c\/strong\u003e Through-the-wall\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct Connection Size:\u003c\/strong\u003e 100mm diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Cell Length:\u003c\/strong\u003e 460mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable Wall Thickness:\u003c\/strong\u003e 321–460mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat Recovery Efficiency:\u003c\/strong\u003e Up to 78%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Extraction Rate:\u003c\/strong\u003e 6 l\/s or 9 l\/s\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoost Extraction Rate:\u003c\/strong\u003e 15 l\/s\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Power Consumption:\u003c\/strong\u003e 3.2W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise Level:\u003c\/strong\u003e As low as 20dB(A)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Type:\u003c\/strong\u003e Lo-Carbon EC\/DC with twin impellers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Type:\u003c\/strong\u003e Overrun timer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSummer Mode:\u003c\/strong\u003e Manual extract-only operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP Rating:\u003c\/strong\u003e IPX4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Bathrooms, kitchens, toilets and utility rooms\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eSimple Installation and Maintenance\u003c\/h5\u003e\n\u003cp\u003eThe Vent-Axia 403835 Tempra SELV LT is designed for installation through an external wall using a standard 100mm diameter opening. Its extended 460mm cell accommodates wall thicknesses from 321mm to 460mm, making it particularly suitable for properties with thicker external walls.\u003c\/p\u003e\n\n\u003cp\u003eThe compact heat exchanger design allows the unit to replace many traditional 100mm extractor fans while providing the additional benefits of heat recovery ventilation. Its straightforward construction and accessible heat exchanger also simplify routine maintenance.\u003c\/p\u003e\n\n\u003cp\u003eInstallation should be carried out in accordance with the manufacturer's instructions and applicable electrical and building regulations, particularly where SELV equipment is required.\u003c\/p\u003e\n\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/asset.eezybridge.com\/nc\/ba7b9546-29dd-40c4-87a7-885627281b87\/VA_LC_Trmpra_Catalogue.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eVent-Axia Lo-Carbon Tempra Data Sheet (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/asset.eezybridge.com\/nc\/ba7b9546-29dd-40c4-87a7-885627281b87\/444367.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eVent-Axia 403835 Installation Guide (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Vent-Axia","offers":[{"title":"Default Title","offer_id":58946154627453,"sku":"403835","price":398.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0582\/1693\/9618\/files\/VA_LC_Tempra_Range_ff1a1e69-a4b9-4c6f-966d-25f27b2e2387.webp?v=1792556809","url":"https:\/\/b2belectrical.com\/products\/vent-axia-403835-lo-carbon-tempra-selv-lt-heat-recovery-unit-longer-cell-timer","provider":"B2Belectrical.com","version":"1.0","type":"link"}