{"product_id":"national-ventilation-monsoon-mon-dmevr125ht-125mm-continuous-running-extractor-fan-with-humidistat-timer-ipx5-white","title":"National Ventilation Monsoon MON-DMEVR125HT 125mm Continuous Running Extractor Fan with Humidistat \u0026 Timer – IPX5 White","description":"\u003cp data-pm-slice=\"1 1 []\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNational Ventilation Monsoon MON-DMEVR125HT\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a high-performance \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e125mm (5-inch) continuous running extractor fan with an integrated humidistat and timer\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, designed to provide efficient, quiet and reliable ventilation in domestic bathrooms, kitchens and utility rooms.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart of the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMonsoon dMEV R range\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, this decentralised mechanical extract ventilation fan delivers continuous background airflow to help remove moisture, stale air and indoor pollutants.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUnlike conventional intermittent extractor fans, the MON-DMEVR125HT operates continuously at a low background extraction rate, increasing ventilation automatically when humidity rises or additional extraction is requested.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe built-in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003edigital humidistat\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e incorporates humidity threshold monitoring and rapid-rise detection, making the fan particularly effective in moisture-prone environments such as bathrooms and shower rooms.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe integrated \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003efixed overrun timer with Comfort Mode\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e helps manage boosted extraction before the fan returns to normal background operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned for low-noise performance, the 125mm Monsoon dMEV R has manufacturer-stated sound levels of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e8.5dB(A) at minimum speed\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, making it suitable for residential installations where quiet continuous ventilation is important.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIts high-pressure, low-noise impeller is designed to deliver effective extraction without requiring a traditional centrifugal fan.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eIPX5 water-resistance rating\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e makes the MON-DMEVR125HT suitable for appropriately installed bathroom Zone 1, 2 and 3 applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned to support the applicable requirements of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eUK Building Regulations Part F and Part L\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, the fan is suitable for new-build properties, refurbishment projects and domestic ventilation upgrades.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith a discreet \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eround white fascia\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, adjustable airflow settings and wall or ceiling mounting capability, the Monsoon MON-DMEVR125HT provides a practical solution for continuous, humidity-controlled mechanical ventilation.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e125mm (5-inch) continuous running extractor fan\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIntegrated digital humidistat\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – automatic humidity-responsive extraction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRapid-rise humidity detection\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – responds to sudden increases in moisture\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFixed overrun timer\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – supports continued extraction following boost activation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eComfort Mode\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – integrated ventilation control function\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eContinuous background ventilation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – helps manage moisture and stale air\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAutomatic boost operation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – increases airflow when required\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eExternal boost switching capability\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – additional ventilation control\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQuiet operation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – 8.5dB(A) at minimum speed\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHigh-pressure, low-noise impeller\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – effective mechanical extraction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAdjustable airflow settings\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – supports accurate commissioning\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIPX5 rated\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – suitable for bathroom Zones 1, 2 and 3 when correctly installed\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e125mm nominal duct connection\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWall or ceiling mounting\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRound white fascia\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – clean, discreet appearance\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDesigned to support Building Regulations Parts F and L\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSuitable for bathrooms, kitchens and utility rooms\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eContinuous Mechanical Extract Ventilation\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe Monsoon MON-DMEVR125HT is designed to provide continuous background extraction, helping maintain airflow through moisture-prone areas of the home.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUnlike traditional intermittent ventilation, which only operates during selected periods, a dMEV fan runs continuously at a low ventilation rate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhen additional extraction is required, the fan can increase its airflow to help remove excess moisture and stale air.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis makes the MON-DMEVR125HT suitable for modern residential properties where continuous mechanical ventilation forms part of the ventilation strategy.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eAutomatic Digital Humidistat\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMON-DMEVR125HT features a built-in digital humidity sensor\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e with automatic threshold and rapid-rise detection.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe manufacturer specifies the following humidity response:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e0–75% relative humidity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e background trickle operation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e76–85% relative humidity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e proportional increase between trickle and boost\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e86–100% relative humidity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e boost extraction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe rapid-rise detection function also responds when relative humidity increases by more than five percentage points over a five-minute period.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis is particularly useful when showering or bathing causes a sudden increase in moisture levels.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe humidity thresholds are factory preset and are not user-adjustable.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eFixed Timer and Comfort Mode\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe Monsoon MON-DMEVR125HT incorporates a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003efixed overrun timer with Comfort Mode\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis helps manage the fan's boosted extraction cycle following activation, allowing ventilation to continue before returning to its normal continuous background setting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe combination of humidity-responsive operation and timer control makes the fan suitable for bathrooms where automatic moisture extraction is preferred.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eQuiet Running Performance\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe Monsoon dMEV R range is engineered for low-noise continuous operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor the 125mm model, the manufacturer's technical data specifies:\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eOperating Speed\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eSound Level\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMinimum\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8.5dB(A)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMaximum\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e37.9dB(A)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003eThe low minimum-speed sound level makes the fan suitable for continuous use in domestic environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eActual noise levels depend on the selected airflow, ductwork, mounting arrangements and installation conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eIPX5 Bathroom Protection\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMON-DMEVR125HT is IPX5 rated\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, providing protection against water jets.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe manufacturer identifies the Monsoon dMEV R range as suitable for bathroom Zones 1, 2 and 3, subject to correct installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis makes it suitable for bathroom and shower-room ventilation projects where an appropriately water-resistant extractor fan is required.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eAdjustable Airflow and Commissioning\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe Monsoon dMEV R range incorporates adjustable airflow settings, allowing the installer to configure the fan to meet the ventilation requirements of the property.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis is particularly important for continuous mechanical extract ventilation systems, where airflow must be correctly commissioned.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe fan is designed to support compliance with the applicable requirements of Building Regulations Part F and Part L.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFinal compliance depends on the complete ventilation design, installation and measured airflow performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSuitable Applications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDomestic bathrooms\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eShower rooms\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eEn-suite bathrooms\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eKitchens\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eUtility rooms\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eToilets and cloakrooms\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eNew-build residential properties\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBathroom refurbishment projects\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDomestic ventilation upgrades\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eContinuous mechanical extract ventilation installations\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eProperties requiring humidity-responsive extraction\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\u003ctable\u003e\n\u003ctbody\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\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eManufacturer\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eNational Ventilation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMonsoon\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003edMEV R\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eManufacturer Part Number\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMON-DMEVR125HT\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eContinuous Running Extractor Fan\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFan Size\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e125mm \/ 5 Inch\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eVentilation Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDecentralised Mechanical Extract\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperation\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eContinuous Trickle and Boost\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHumidistat\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIntegrated Digital Sensor\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHumidity Threshold Detection\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eRapid-Rise Humidity Detection\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHumidity Thresholds\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFactory Preset\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOverrun Timer\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFixed\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eComfort Mode\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eExternal Boost Control\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eAirflow Adjustment\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAdjustable\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMinimum Sound Level\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8.5dB(A)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMaximum Sound Level\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e37.9dB(A)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eIP Rating\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIPX5\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBathroom Zone Suitability\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eZones 1, 2 and 3*\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMounting\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eWall or Ceiling\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eNominal Fan Size\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e125mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSpigot Diameter\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e120mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFascia Diameter\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e228mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eDimension A\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e66mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eDimension B\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e57mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eColour\u003c\/span\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\u003cspan\u003eApplication\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDomestic Ventilation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eRegulatory Design\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBuilding Regulations Parts F \u0026amp; L\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eBathroom zone suitability is subject to correct installation, the manufacturer's instructions and applicable electrical regulations.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eFrequently Asked Questions\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eWhat is the Monsoon MON-DMEVR125HT?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMON-DMEVR125HT\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a 125mm continuous running extractor fan with an integrated humidity sensor and fixed timer, designed for bathrooms, kitchens and utility rooms.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDoes the MON-DMEVR125HT run continuously?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYes. The fan provides continuous background ventilation and increases its extraction rate when additional airflow is required.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDoes it have a built-in humidistat?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYes. The HT model includes an integrated digital humidistat with preset humidity threshold and rapid-rise detection.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDoes the fan automatically increase speed when someone showers?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYes. The humidistat can respond to increased humidity and rapid changes in moisture levels, automatically increasing extraction when the preset conditions are met.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCan the humidity sensitivity be adjusted?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eNo. The manufacturer specifies preset humidity thresholds that are not user-adjustable.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDoes the MON-DMEVR125HT have a timer?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYes. It includes a fixed overrun timer with Comfort Mode.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eHow quiet is the MON-DMEVR125HT?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe manufacturer's technical data lists \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e8.5dB(A) at minimum speed\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e37.9dB(A) at maximum speed\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for the 125mm model.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIs it suitable for bathroom Zone 1?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYes. The fan is IPX5 rated, and the manufacturer specifies suitability for Zones 1, 2 and 3 when correctly installed.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCan the fan be used in a kitchen?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYes. The Monsoon dMEV R range is designed for bathrooms, kitchens and utility rooms. The airflow must be commissioned to meet the requirements of the installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCan it be ceiling mounted?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYes. The fan is designed for wall or ceiling mounting in accordance with the manufacturer's instructions.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat size ducting does it use?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe fan is a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e125mm nominal model\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with a manufacturer-specified spigot diameter of 120mm. Compatible ducting and installation dimensions should be checked before fitting.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat is the difference between MON-DMEVR125 and MON-DMEVR125HT?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMON-DMEVR125\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is the standard 125mm continuous running model without an integrated humidity sensor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMON-DMEVR125HT\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e includes an integrated digital humidistat for automatic humidity-responsive ventilation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBoth models belong to the Monsoon dMEV R range.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat is the difference between MON-DMEVR100HT and MON-DMEVR125HT?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMON-DMEVR100HT\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is the 100mm version, while the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMON-DMEVR125HT\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is the larger 125mm version.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBoth feature continuous ventilation, integrated humidity sensing and fixed timer functionality.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe correct model should be selected according to the ducting arrangement and required ventilation performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eInstallation Information\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe National Ventilation Monsoon MON-DMEVR125HT is designed for fixed electrical installation and should be fitted by a suitably competent person.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eInstallation must follow the manufacturer's instructions and applicable requirements of BS 7671.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe installer should ensure that suitable ductwork, electrical isolation and airflow commissioning are provided.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor panel, ceiling or interior wall installations, the manufacturer's installation instructions specify a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e130mm mounting hole\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for the 125mm fan.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBathroom zone suitability must be assessed as part of the complete electrical installation.\u003c\/span\u003e\u003c\/p\u003e","brand":"National Ventilation","offers":[{"title":"Default Title","offer_id":55135324635482,"sku":"MON-DMEVR125HT","price":106.56,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/6232\/6106\/files\/dMEV-R-1_1.avif?v=1793971873","url":"https:\/\/account.alertelectrical.com\/products\/national-ventilation-monsoon-mon-dmevr125ht-125mm-continuous-running-extractor-fan-with-humidistat-timer-ipx5-white","provider":"Alert Electrical","version":"1.0","type":"link"}