{"product_id":"knightsbridge-ex1twh-extractor-fan-with-over-run-timer-white-4-inch","title":"Knightsbridge EX1TWH Extractor Fan with Over Run Timer White 4 Inch","description":"\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eKnightsbridge EX1TWH Extractor Fan\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a sleek, high-performance ventilation solution designed for quiet and efficient air extraction in bathrooms, toilets, and utility rooms. Featuring a clean white finish that complements any interior, this 4-inch (100mm) fan delivers powerful 24 litres per second airflow while operating at an whisper-quiet 28.5dBA. The integrated adjustable over-run timer (2-30 minutes) ensures continued operation after the room is vacated, effectively removing residual moisture and preventing condensation and mould growth. With IP45 ingress protection, double insulation, and compliance with Building Regulations Part F \u0026amp; Part L, the EX1TWH delivers reliable, energy-efficient performance backed by a comprehensive 3-year manufacturer warranty.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eKey Features of Knightsbridge EX1TWH Extractor Fan\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eAdjustable Over-Run Timer:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 2-30 minute adjustable run-on timer (preset 2 minutes) for effective post-occupancy moisture removal.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eClean White Finish:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Versatile, neutral appearance suits any bathroom or utility room decor.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eLow Noise Operation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Quiet 28.5dBA at 3m for discreet, unobtrusive operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eEffective Extraction Rate:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 24 litres per second airflow for efficient ventilation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003e4 Inch (100mm) Diameter:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Standard size suitable for wall or ceiling installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eIP45 Rated:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Protected against water jets, suitable for bathroom zones.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eDouble Insulated:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e No earth connection required for safe installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eBuilding Regulations Compliant:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Meets Part F (ventilation) and Part L (conservation of fuel and power) requirements.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eEasy Installation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 102mm cut-out diameter for straightforward fitting.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eLow Maintenance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Reliable operation with long service life.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003e3 Year Manufacturer Warranty:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Comprehensive coverage for peace of mind.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eVersatile Applications:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Ideal for bathrooms, toilets, utility rooms, and kitchens.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eModern Design:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Sleek appearance blends with contemporary interiors.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cdiv class=\"ds-scroll-area _1210dd7 c03cafe9\"\u003e\n\u003cdiv class=\"ds-scroll-area__gutters\"\u003e\n\u003cdiv class=\"ds-scroll-area__horizontal-gutter\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ds-scroll-area__vertical-gutter\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eDetails\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eKnightsbridge\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eEX1TWH\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eExtractor Fan with Over-Run Timer\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eFinish\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eWhite\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eFan Diameter\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e100mm (4 Inch)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eExtraction Rate\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 l\/s\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eNoise Level\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e28.5dBA at 3m\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eTimer\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAdjustable 2-30 minutes (preset 2 mins)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eIP Rating\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIP45\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eInsulation\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDouble Insulated (Class II)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eCut-Out Diameter\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e102mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eDimensions\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e157.6mm (H) x 157.6mm (W) x 127.2mm (D)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eVoltage\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e230V 50Hz\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eCompliance\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBuilding Regulations Part F \u0026amp; Part L\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eWarranty\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3 Years\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBathrooms, toilets, utility rooms\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eFrequently Asked Questions (FAQs)\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003e1. How does the over-run timer benefit bathroom ventilation?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThe timer keeps the fan running for a set period after the light is switched off, continuing to extract steam and moisture that would otherwise condense on walls and ceilings, preventing mould growth and decoration damage.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003e2. What is the difference between this model and the humidistat version (EX1THWH)?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThe EX1TWH features timer-only control, activating with the light switch and running on after switch-off. The EX1THWH adds automatic humidistat activation, turning on independently when humidity rises, even without the light.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003e3. Is this fan suitable for continuous running or intermittent use only?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThis model is designed for intermittent use, typically activated by the light switch. For continuous background ventilation requirements, consider dedicated continuous-running fan models.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003e4. Can the timer setting be adjusted after installation?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eYes, the timer is adjustable from 2-30 minutes via an internal potentiometer. Access may require removing the fan cover, so adjustment is best done during installation but can be changed later if needed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003e5. What is the recommended room size for effective ventilation with this fan?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eWith 24 l\/s extraction rate, this fan is suitable for small to medium bathrooms and ensuites up to approximately 15-20m³. For larger spaces, additional ventilation or higher capacity units may be required.\u003c\/span\u003e\u003c\/p\u003e","brand":"Knightsbridge","offers":[{"title":"Default Title","offer_id":57076988903806,"sku":null,"price":29.65,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0985\/3832\/4350\/files\/EX1TWH.webp?v=1773249778","url":"https:\/\/ssmelectric.co.uk\/products\/knightsbridge-ex1twh-extractor-fan-with-over-run-timer-white-4-inch","provider":"SSM ELECTRIC","version":"1.0","type":"link"}