{"title":"Positive Pressure Units","description":"\u003cp\u003ePositive Input Ventilation or PIV systems have been around for decades and largely only used to treat condensation and mould issues. However in recent times, PIV has seen a resurgence in both domestic and commercial settings as the need for clean, fresh air has become more important than ever.\u003c\/p\u003e\u003cp\u003ePositive Input Ventilation Systems effectively eliminate surface condensation by replacing stagnant, humid air with fresh, filtered air. These systems operate by promoting the flow of air from indoors to outdoors.\u003c\/p\u003e\u003cp\u003eFor more information \u003ca href=\"\/blogs\/what-is-positive-input-ventilation\"\u003eclick here\u003c\/a\u003e or to watch our helpful PIV Q\u0026amp;A video \u003ca href=\"\/blogs\/positive-input-ventilation-piv-questions-answered\"\u003eclick here\u003c\/a\u003e\u003c\/p\u003e","products":[{"product_id":"vent-axia-479091-positive-input-ventilation-system-piv-with-heater","title":"Vent Axia 479091 Positive Input Ventilation System PIV with Heater","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe Vent-Axia PureAir Home PIV improves indoor air quality and quickly eradicates conditions that lead to mould growth, reducing the risk of health issues in the home. The unit is unobtrusive, near silent running and has low operating costs.\u003c\/p\u003e\u003cp\u003eThe 479091 features an efficient built-in 500W heater mounted in the unit which increases the ambiant temperature of the air entering the habitable areas. The heater uses a sensor to monitor the temperature in the loft, automatically adjusting the air volume when necessary.\u003c\/p\u003e\u003cp\u003eAdditionally, resident comfort can be assured through an option to change the temperature at which the unit increases or decreases airflow. The unit will continuously ventilate silently in the background whilst in Trickle mode.\u003c\/p\u003e\u003cp\u003eThe PureAir PIV is lightweight in construction and features a specially developed Lo-Carbon DC fan\/motor arrangement which runs quietly and delivers incredibly low running costs.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePIV protects properties and residents from harmful mould and reduces condensation.\u003c\/li\u003e\n\u003cli\u003eWhole house air purification and humidity control - up to 5 bedrooms\u003c\/li\u003e\n\u003cli\u003eSupplied with G4 Filters\u003c\/li\u003e\n\u003cli\u003eAnti-vibration joist mounting legs as standard\u003c\/li\u003e\n\u003cli\u003eFully adjustable between 19l\/s - 49l\/s\u003c\/li\u003e\n\u003cli\u003eLow maintenance\u003c\/li\u003e\n\u003cli\u003eOn unit control with LED display\u003c\/li\u003e\n\u003cli\u003e5 year guarantee\u003c\/li\u003e\n\u003cli\u003eManufactured in the UK\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Vent Axia","offers":[{"title":"Default Title","offer_id":58035192070408,"sku":"VEN 479091","price":283.19,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1044\/2362\/0872\/files\/vent-axia-479091-positive-input-ventilation-system-piv-with-heater-5066-p.png?v=1784044144"},{"product_id":"vent-axia-pureair-479090-positive-input-ventilation-system-piv","title":"Vent Axia PureAir 479090 Positive Input Ventilation System PIV","description":"\u003cb\u003e\u003cdiv\u003e\u003cb\u003e\u003cdiv style=\"display: inline !important; \"\u003eWhole House Positive Pressure Ventilation Unit \u003c\/div\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\u003c\/b\u003e\u003cdiv\u003eThis loft mounted input fan draws fresh air from the outside atmosphere, filters it and pushes into the dwelling via a ceiling mounted diffuser. All stale air in the property is forced out through the natural forms of ventilation or trickle vents.\u003c\/div\u003e\u003cdiv\u003e\u003c\/div\u003e\u003cdiv\u003eThe robust construction of the PureAir features a specially developed LoWatt DC fan motor which gives incredibly low running costs. The special insulation mount ensures that it is extremely quiet in operation. It may be used for air replacement in conjunction with exisitng extractor fans. \u003c\/div\u003e\u003cdiv\u003e\u003c\/div\u003e\u003cdiv\u003eThe unit includes a filter with up to 5 years maintenance intervals to reduce the number of call outs needed throughout its life span. The unit features a time elapsed meter to enable precise running information. With selection of 2 of 6 speeds available up to 50l\/s, the unit is suitable for houses up to 360m3.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003ePerformance:\u003c\/strong\u003e\u003cbr\u003e \u003ctable border=\"0\" cellpadding=\"1\" cellspacing=\"1\" style=\"width: 500px; \"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtraction Rate L\/s :\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e26\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e42\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower (w) :\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloor Area (m2) :\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e55\u003c\/td\u003e\n\u003ctd\u003e80\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e130\u003c\/td\u003e\n\u003ctd\u003e150\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise dB(A) :\u003c\/td\u003e\n\u003ctd\u003e19\u003c\/td\u003e\n\u003ctd\u003e19\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e21\u003c\/td\u003e\n\u003ctd\u003e22\u003c\/td\u003e\n\u003ctd\u003e23\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eThe PureAir uses a sensor to monitor the temperature in the loft, automatically adjusting the air volume when necessary. 'Trickle' speed is automatically selected when the ambient loft temperature is up to 18°C. 'Normal' is automatically selected when the ambient loft temperature is between 18 and 27°C. If the ambient loft temperature exceeds 27°C, the PoziDry will automatically switch to standby (no airflow). \u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv\u003e\u003cstrong\u003e\u003cdiv style=\"display: inline !important; \"\u003eInstallation\u003c\/div\u003e\u003c\/strong\u003e\u003c\/div\u003e\u003cdiv\u003eSimply install, out of sight in the loft space, either suspended from a roof beam or floor mounted. It has a purpose designed diffuser, normally located over the stairwell of a conventional two story dwelling or in the main hall of a bungalow. It is set to the appropriate speed at installation based on the size of the dwelling, providing positive pressure input ventilation. Background ventilation openings provide the exhaust points.\u003c\/div\u003e","brand":"Vent Axia","offers":[{"title":"Default Title","offer_id":58035343163656,"sku":"VEN 479090","price":293.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1044\/2362\/0872\/files\/vent-axia-pureair-479090-positive-input-ventilation-system-piv-5217-p.png?v=1784044253"},{"product_id":"monsoon-energysaver-heated-positive-input-ventilation-system-piv","title":"Monsoon Energysaver Heated Positive Input Ventilation System PIV","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe Monsoon Energysaver Positive Input System (PIV) is designed for use in almost all property types with both loft and wall units available. For homes with loft spaces, the PPS\/LH is installed in the loft and the discreet diffuser is stalled in the hallway. Gently introducing tempered air into the house curing even stubborn mould and condensation issues.\u003c\/p\u003e\u003cp\u003ePositive Input Systems are tried and tested to increase circulation within the home removing the environments for mould growth. Within a few weeks of installing a positive input system, you will notice the mould will have dried out and can be treated safely in the knowledge it will not return.\u003c\/p\u003e\u003cp\u003eBy gently introducing fresh tempered air into your home you alleviate many of the issues that cause poor indoor air quality. Poor indoor air quality can lead to condensation which in time will cause mould and damp problems within the home. The neatly designed heater is fitted to the unit to temper the incoming air stopping cold draughts. The G4 Filters remove harmful particles such as pollen and dust which can cause allergies.\u003c\/p\u003e\u003cp\u003eKey Features\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHelps to alleviate condensation and mould\u003c\/li\u003e\n\u003cli\u003eLow maintenance\u003c\/li\u003e\n\u003cli\u003e5 year guarantee\u003c\/li\u003e\n\u003cli\u003eManufactured in the UK\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"National Ventilation","offers":[{"title":"Default Title","offer_id":58035379699976,"sku":"MON PPS\/LH","price":317.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1044\/2362\/0872\/files\/monsoon-energysaver-heated-positive-input-ventilation-system-piv-5219-p.jpg?v=1784044259"},{"product_id":"monsoon-energysaver-heated-compact-positive-input-ventilation-system-piv","title":"Monsoon Energysaver Heated Compact Positive Input Ventilation System PIV","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe Monsoon Energysaver Positive Pressure System (PIV) is designed for use in almost all property types with both loft and wall units available.\u003cbr\u003eFor homes without loft spaces such as flats\/apartments and basement flats, the PPS\/W\/H is installed on the wall in a central hallway. Gently introducing tempered air into the house curing even stubborn mould and condensation issues.\u003c\/p\u003e\u003cp\u003ePositive Input Systems are tried and tested to increase circulation within the home removing the environment for mould growth. Within a few weeks of installing a positive input system, you will notice the mould will have dried out and can be treated safe in the knowledge it will not return.\u003c\/p\u003e\u003cp\u003eBy gently introducing fresh tempered air into your home you alleviate many of the issues that cause poor indoor air quality. Poor indoor air quality can lead to condensation which in time will cause mould and damp problems within the home. The neatly designed heater is fitted to the unit to temper the incoming air stopping cold draughts. The G4 Filters remove harmful particles such as pollen and dust which can cause allergies.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEasy to mount with lightweight foam construction\u003c\/li\u003e\n\u003cli\u003eCompact design\u003c\/li\u003e\n\u003cli\u003eHelps to alleviate condensation and mould\u003c\/li\u003e\n\u003cli\u003eLow maintenance\u003c\/li\u003e\n\u003cli\u003eOn unit control with LED display\u003c\/li\u003e\n\u003cli\u003e5 year guarantee\u003c\/li\u003e\n\u003cli\u003eManufactured in the UK\u003c\/li\u003e\n\u003cli\u003eDimensions: 206mm H x 393mm W x 200mm D\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"National Ventilation","offers":[{"title":"Default Title","offer_id":58035396575496,"sku":"MON PPS\/W\/H","price":316.07,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1044\/2362\/0872\/files\/monsoon-energysaver-heated-compact-positive-input-ventilation-system-piv-5220-p.jpg?v=1784044267"},{"product_id":"200mm-fire-rated-supply-diffuser","title":"200mm Fire-Rated Supply Diffuser","description":"\u003c!-- x-tinymce\/html --\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis 8-inch\/200mm supply valve is designed for use with PIV systems installed in homes with 3 or more storeys to protect stairwells and escape routes in the event of a fire. The grilles include an intumescent material that gives a 60-minute fire rating in solid timber joist floor\/ceiling constructions and a 30-minute fire rating in I-Beam and metal web joist floor\/ceiling constructions, meeting the requirements of Approved Document B of the UK Building Regulations.\u003c\/p\u003e\u003cp\u003eThe valves are constructed from white epoxy finished steel and are supplied complete with a bayonet action fixing frame. This allows positive locking and sealing of the valve, yet still enables easy removal for adjustment or cleaning.\u003cbr\u003e\u003cbr\u003eThe valve profile is designed to eliminate fouling of adjacent decorated surfaces. The central core is adjustable and offers a wide range of settings to meet specific system designs.\u003c\/p\u003e\u003cp\u003e\u003c!-- x-tinymce\/html --\u003e\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e60 Minutes Fire Rating in Solid Timber Joist Floor\/Ceilings Constructions\u003c\/li\u003e\n\u003cli\u003e30 Minutes Fire Rating in I-Beam and Metal Web Joist Floor\/Ceiling Constructions\u003c\/li\u003e\n\u003cli\u003eNo maintenance required\u003c\/li\u003e\n\u003cli\u003eMeets the requirements of Approved Document B\u003c\/li\u003e\n\u003cli\u003eSimple to install\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"National Ventilation","offers":[{"title":"Default Title","offer_id":58037860565256,"sku":"VEN 475664","price":88.45,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1044\/2362\/0872\/files\/200mm-fire-rated-supply-diffuser-7689-p.jpg?v=1784050335"},{"product_id":"tornado-stpivlh-heated-positive-input-ventilation-piv-system","title":"Tornado STPIVLH Heated Positive Input Ventilation PIV System","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe Tornado STPIVLH Positive Input Ventilation Unit is designed to create a fresher, healthier home by delivering a continuous supply of filtered air from your loft space into the property.\u003cbr\u003eAir is gently introduced through a ceiling-mounted diffuser, typically installed in a hallway or landing, helping to improve indoor air quality while tackling persistent condensation and mould issues.\u003c\/p\u003e\u003cp\u003eTo maintain comfort throughout the year, the unit features an intelligent temperature control system. When loft temperatures fall below 10°C, an internal heating element activates to gently warm the incoming air. As temperatures rise above 10°C, the heater automatically switches off. For added flexibility, an optional Heater Enable Switch is available, allowing you to manually enable or disable the automatic heater function.\u003c\/p\u003e\u003cp\u003eThe unit also responds to seasonal temperature changes. Between 19°C and 25°C, airflow is increased by 10% to optimise ventilation performance. During very warm conditions above 25°C, the system will temporarily pause to prevent hot loft air being introduced into the home.\u003c\/p\u003e\u003cp\u003eThe STPIVLH comes complete with a 200mm ceiling diffuser and all components required for a straightforward installation in the loft above a hallway or landing area.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eContinuous supply of fresh, filtered air to improve indoor air quality\u003c\/li\u003e\n\u003cli\u003eSuitable for 1  5 bedroom houses\u003c\/li\u003e\n\u003cli\u003eFour speed settings for all ventilation needs\u003c\/li\u003e\n\u003cli\u003eEffectively combats condensation and mould growth\u003c\/li\u003e\n\u003cli\u003eLoft Unit Whole House Ventilation\u003c\/li\u003e\n\u003cli\u003eEliminates Condensation \u0026amp; Prevents Mould\u003c\/li\u003e\n\u003cli\u003eSupplied with everything you need to install including ducting and stylish white square diffuser\u003c\/li\u003e\n\u003cli\u003eBuilt-in Heater - Auto-boost airflow by 10% between 19°C25°C\u003c\/li\u003e\n\u003cli\u003eSummer Bypass - Temperature protection shuts unit off above 25°C to prevent overheating indoors\u003c\/li\u003e\n\u003cli\u003eQuiet Operation\u003c\/li\u003e\n\u003cli\u003eLow Running Costs\u003c\/li\u003e\n\u003cli\u003eDimensions - 400 × 450 × 380mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tornado","offers":[{"title":"Default Title","offer_id":58037870133512,"sku":"TOR STPIVLH","price":241.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1044\/2362\/0872\/files\/tornado-stpivlh-heated-positive-input-ventilation-piv-system-7702-p.jpg?v=1784050358"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1044\/2362\/0872\/collections\/positive-pressure-units-68-c.jpg?v=1781630074","url":"https:\/\/www.extractorfanworld.co.uk\/collections\/positive-pressure-units-68.oembed","provider":"Extractor Fan World","version":"1.0","type":"link"}