{"title":"VDI 2035 Rothenberger","description":"\u003ch2\u003eROTHENBERGER cartridges to fill heating systems with water to VDI 2035\u003c\/h2\u003e\u003cp\u003eA demineralisation cartridge is a resin filter that removes lime and salts from fill water to protect boilers, heat pumps and solar circuits. Q-Tech brings together \u003cstrong\u003ethe ROTHENBERGER PURE H2O range\u003c\/strong\u003e here for installers and owners who fill or top up a closed circuit. For all models, \u003cstrong\u003eask for a quote\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eModels in the collection\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003cth\u003eProduct\u003c\/th\u003e\u003cth\u003eVersions\u003c\/th\u003e\u003cth\u003eCapacity at 1 °dH\u003c\/th\u003e\u003cth\u003eMaximum flow\u003c\/th\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003e\u003ca href=\"\/en-en\/products\/rothenberger-pure-h2o-demineralisation-cartridge\"\u003eROTHENBERGER PURE H2O\u003c\/a\u003e\u003c\/th\u003e\u003ctd\u003eSizes S, M and L and S set with wall station\u003c\/td\u003e\u003ctd\u003e2,000, 4,000 or 7,000 litres\u003c\/td\u003e\u003ctd\u003e5 or 10 litres per minute\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eData according to ROTHENBERGER.\u003c\/p\u003e\u003ch3\u003eHow to choose\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eLitres you need:\u003c\/strong\u003e divide the capacity at 1 °dH by your water hardness; at 14 °dH, S gives 140 litres, M 280 and L 500.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eFlow:\u003c\/strong\u003e S fills at 5 litres per minute; M and L at 10.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eMounting:\u003c\/strong\u003e the S set includes a wall bracket and hose for a fixed filling point.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOther brand:\u003c\/strong\u003e compare ROTHENBERGER with magnetic in \u003ca href=\"\/en-en\/collections\/vdi-2035-water-quality\"\u003eVDI 2035 water quality\u003c\/a\u003e.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eFilling new heat pump or boiler installations.\u003c\/li\u003e\u003cli\u003eTop-ups during annual maintenance.\u003c\/li\u003e\u003cli\u003eDraining and refilling after a circuit refurbishment.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eWhy choose Q-Tech?\u003c\/h3\u003e\u003col\u003e\u003cli\u003eWe integrate filling into the \u003ca href=\"\/en-en\/pages\/pre-montaje-avanzado\"\u003epre-assembled plant room\u003c\/a\u003e, tested in our workshop.\u003c\/li\u003e\u003cli\u003eWe fit the cartridge and carry out the first fill with an \u003ca href=\"\/en-en\/products\/tecnico-experto-in-situ-horas\"\u003eon-site Expert Technician\u003c\/a\u003e.\u003c\/li\u003e\u003cli\u003eWe explain the guideline in our article \u003ca href=\"\/en-en\/blogs\/news\/vdi-2035-agua-aerotermia-calefaccion\"\u003eVDI 2035: water quality in heat pumps and heating systems\u003c\/a\u003e.\u003c\/li\u003e\u003c\/ol\u003e\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the price?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAsk for a quote: message us on \u003ca href=\"https:\/\/wa.me\/qtechhouses\" target=\"_blank\" rel=\"noopener\"\u003eWhatsApp\u003c\/a\u003e with the size and we will send it to you.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know the cartridge is exhausted?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBy its colour: the resin changes colour as it is used up, according to ROTHENBERGER.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAsk for a quote to fill your heating system to VDI 2035\u003c\/strong\u003e.\u003c\/p\u003e\u003cp class=\"qt-version\"\u003eUpdated 07-11-2026 · v5.4\u003c\/p\u003e","products":[{"product_id":"rothenberger-pure-h2o-cartucho-desmineralizacion","title":"ROTHENBERGER PURE H2O demineralisation cartridge for VDI 2035 heating fill","description":"\u003ch2\u003eDemineralisation cartridge to fill heating systems with treated water to VDI 2035\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eROTHENBERGER PURE H2O\u003c\/strong\u003e connects to the filling hose and supplies \u003cstrong\u003edemineralised water to VDI 2035\u003c\/strong\u003e for boilers, heat pumps and solar circuits. The resin changes colour when exhausted, with no measuring equipment needed. Price on request: message us on \u003ca href=\"https:\/\/wa.me\/qtechhouses\" target=\"_blank\" rel=\"noopener\"\u003eWhatsApp\u003c\/a\u003e and we will send you a quote.\u003c\/p\u003e\u003ch3\u003eSummary\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003cth\u003eType\u003c\/th\u003e\u003ctd\u003eDemineralisation cartridge with two-component mixed-bed resin\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eBrand and model\u003c\/th\u003e\u003ctd\u003eROTHENBERGER PURE H2O, sizes S, M and L and S set with wall station\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eUse\u003c\/th\u003e\u003ctd\u003eFilling and topping up closed heating circuits\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eCapacity\u003c\/th\u003e\u003ctd\u003e2,000, 4,000 or 7,000 litres at 1 °dH, depending on size\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eMaximum flow\u003c\/th\u003e\u003ctd\u003e5 litres per minute for S and 10 litres per minute for M and L\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eConnection\u003c\/th\u003e\u003ctd\u003e¾\" thread on both sides\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eQ-Tech installation\u003c\/th\u003e\u003ctd\u003eFitting and first fill during an \u003ca href=\"\/en-en\/products\/tecnico-experto-in-situ-horas\"\u003eon-site Expert Technician\u003c\/a\u003e visit\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eTechnical data\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003cth\u003eResin\u003c\/th\u003e\u003ctd\u003eTwo-component mixed bed that changes colour when exhausted\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eMaximum water temperature\u003c\/th\u003e\u003ctd\u003e60 °C for short periods\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eMaximum pressure\u003c\/th\u003e\u003ctd\u003e4 bar for short periods\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eConnection\u003c\/th\u003e\u003ctd\u003e¾\" inlet and outlet\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eStandards cited by the manufacturer\u003c\/th\u003e\u003ctd\u003eVDI 2035, SWKI and Ö-Norm; UNE 112076 on its Spanish website\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eModels and data by variant\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003cth\u003eVersion\u003c\/th\u003e\u003cth\u003eReference\u003c\/th\u003e\u003cth\u003eDimensions\u003c\/th\u003e\u003cth\u003eMaximum flow\u003c\/th\u003e\u003cth\u003eCapacity at 1 °dH\u003c\/th\u003e\u003cth\u003eCapacity at 14 °dH\u003c\/th\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eSize S\u003c\/th\u003e\u003ctd\u003e1500004290\u003c\/td\u003e\u003ctd\u003e450 × 80 × 80 mm\u003c\/td\u003e\u003ctd\u003e5 l per minute\u003c\/td\u003e\u003ctd\u003e2,000 l\u003c\/td\u003e\u003ctd\u003e140 l\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eSize M\u003c\/th\u003e\u003ctd\u003e1500004322\u003c\/td\u003e\u003ctd\u003e450 × 110 × 110 mm\u003c\/td\u003e\u003ctd\u003e10 l per minute\u003c\/td\u003e\u003ctd\u003e4,000 l\u003c\/td\u003e\u003ctd\u003e280 l\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eSize L\u003c\/th\u003e\u003ctd\u003e1500004325\u003c\/td\u003e\u003ctd\u003e770 × 110 × 110 mm\u003c\/td\u003e\u003ctd\u003e10 l per minute\u003c\/td\u003e\u003ctd\u003e7,000 l\u003c\/td\u003e\u003ctd\u003e500 l\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003cth\u003eS set with wall station\u003c\/th\u003e\u003ctd\u003e1500004350\u003c\/td\u003e\u003ctd\u003eS cartridge, wall bracket and connection hose\u003c\/td\u003e\u003ctd\u003e5 l per minute\u003c\/td\u003e\u003ctd\u003e2,000 l\u003c\/td\u003e\u003ctd\u003e140 l\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eCompatibility and limits\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eFor closed heating circuits with wall-hung gas boilers, heat pumps or solar thermal systems, according to ROTHENBERGER.\u003c\/li\u003e\u003cli\u003eEach cartridge treats \u003cstrong\u003e2,000 to 7,000 litres at 1 °dH\u003c\/strong\u003e: divide that figure by your water hardness.\u003c\/li\u003e\u003cli\u003eSize S handles 5 litres per minute; M and L reach \u003cstrong\u003e10 litres per minute of flow\u003c\/strong\u003e.\u003c\/li\u003e\u003cli\u003eMaximum temperature and pressure of 60 °C and 4 bar, for short periods only.\u003c\/li\u003e\u003cli\u003eAsk for \u003cstrong\u003efitting by a Q-Tech Expert Technician\u003c\/strong\u003e if you want the fill documented.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhich size do I need?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIt depends on volume and hardness. With 14 °dH water, S gives 140 litres, M 280 and L 500, according to ROTHENBERGER.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the price?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOn request. Message us on \u003ca href=\"https:\/\/wa.me\/qtechhouses\" target=\"_blank\" rel=\"noopener\"\u003eWhatsApp\u003c\/a\u003e and we will send you a quote.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the delivery time?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMade to order: we will confirm the lead time before preparing your order.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know the cartridge is exhausted?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBy its colour. The resin changes colour as it is used up and shows when the cartridge needs replacing.\u003c\/p\u003e\u003cdiv class=\"qt-calc\" style=\"display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin:1.6em 0;\"\u003e\u003cdiv style=\"flex:1 1 280px;padding:16px 18px;border:1px solid rgba(27,34,48,0.14);border-radius:12px;background:rgba(27,34,48,0.03);\"\u003e\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong\u003eQ-Tech VDI 2035 calculator\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"margin:0 0 8px;\"\u003eCheck whether the water in your heating system meets the VDI 2035 guideline (Part 1, 2021). Enter the output, the system volume in litres and the hardness and conductivity of your mains water: the calculator gives you the verdict and the three key figures for filling or topping up the circuit. If you need it, we will send you the full report.\u003c\/p\u003e\u003cp style=\"margin:0;font-size:0.85em;opacity:0.75;\"\u003eGuidance only: check the manufacturer's requirements.\u003c\/p\u003e\u003c\/div\u003e\u003ca href=\"\/en-en\/pages\/calculadora-vdi-2035\" title=\"Open the VDI 2035 calculator\" style=\"flex:1 1 280px;display:block;border-radius:12px;overflow:hidden;box-shadow:0 4px 14px rgba(27,34,48,0.12);\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0015\/4592\/8792\/files\/vdi2035-calculadora-banner-qtech-en.webp?v=1794073125\" alt=\"VDI 2035 calculator: check whether your system water meets the guideline. Open the calculator\" width=\"2400\" height=\"1200\" loading=\"lazy\" style=\"display:block;width:100%;height:auto;\"\u003e\u003c\/a\u003e\u003c\/div\u003e\u003ch3\u003eDocumentation\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/www.rothenberger.com\/es-es\/productos\/desmineralizacion\/cartucho-de-desmineralizacion-pure-h2o-tamano-s-1500004290\" target=\"_blank\" rel=\"noopener\"\u003ePURE H2O page on the ROTHENBERGER website (in Spanish)\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003cp class=\"qt-nota-stock\"\u003e\u003cstrong\u003eAvailability and lead times:\u003c\/strong\u003e made to order. We will confirm the lead time before preparing your order.\u003c\/p\u003e","brand":"ROTHENBERGER","offers":[{"title":"Size S","offer_id":59063855350104,"sku":"ROT-1500004290","price":0.0,"currency_code":"EUR","in_stock":false},{"title":"Size M","offer_id":59063855382872,"sku":"ROT-1500004322","price":0.0,"currency_code":"EUR","in_stock":false},{"title":"Size L","offer_id":59063855415640,"sku":"ROT-1500004325","price":0.0,"currency_code":"EUR","in_stock":false},{"title":"S set with wall station","offer_id":59063855448408,"sku":"ROT-1500004350","price":0.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0015\/4592\/8792\/files\/rothenberger-pure-h2o-tamano-l-vista-frontal.webp?v=1794069976"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0015\/4592\/8792\/collections\/coleccion-vdi-2035-rothenberger.webp?v=1794080186","url":"https:\/\/q-tech.es\/en-en\/collections\/vdi-2035-water-quality-rothenberger.oembed","provider":"Q-Tech ® ","version":"1.0","type":"link"}