{"product_id":"naturzugkessel-defro-firewood-plus-12-kw","title":"Natural Draft Boiler Defro Firewood Plus 12 kW","description":"\u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eProduct Overview \u0026 Application\u003c\/h2\u003e \u003cp\u003eThe Defro Firewood Plus 12 kW is a hand-fed natural draft boiler for split logs, designed for hot water heating systems with a buffer tank. It is suitable for heating systems that use solid biomass in the form of natural split logs and where the system is professionally integrated into a closed heating system.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eTechnology \u0026 Equipment\u003c\/h2\u003e \u003cp\u003eThe boiler body is constructed as a water-carrying steel structure with multiple flue gas passes. Heat transfer occurs via convection channels with turbulators, while combustion is supported by primary air and laterally supplied secondary air. The equipment includes, among other things, an electronic draft regulator, an analog boiler thermometer, a cast iron grate, a safety heat exchanger, and thermal insulation made of asbestos-free mineral wool.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eEveryday Benefits\u003c\/h2\u003e \u003cp\u003eThe separate arrangement of the loading door, ignition door, and ash chamber door facilitates operation, refueling, and cleaning. The pull-out cast iron grate, the ash chamber, and access to the heat exchanger chamber support regular maintenance during operation. The analog thermometer allows direct monitoring of the boiler temperature at the unit.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eSystem Integration \u0026 Compatibility\u003c\/h2\u003e \u003cp\u003eThe Firewood Plus 12 kW is intended for operation in closed hot water heating systems and must be combined with a heating buffer tank. For safe and permanent system operation, a professionally installed return temperature boost, suitable safety devices, and an appropriately sized chimney are required.\u003c\/p\u003e \u003c\/div\u003e \u003cstyle\u003e .product-th{margin-top:2rem}.product-th h2{margin:0 0 1rem}.product-th__table{width:100%;border-collapse:separate;border-spacing:0}.product-th__table td{padding:.95rem 1rem;vertical-align:top}.product-th__label{font-weight:700;width:38%;color:#213670}.product-th__value{color:#1f2937}.product-th__table tr:nth-child(odd) td{background:#f4f7fb}.product-th__table tr:nth-child(even) td{background:#fafbfd} \u003c\/style\u003e \u003cdiv class=\"product-th\"\u003e \u003ch2\u003eTechnical Data at a Glance\u003c\/h2\u003e \u003cp\u003eThe following values refer to the Defro Firewood Plus 12 kW model.\u003c\/p\u003e \u003ctable class=\"product-th__table\"\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eRated Output\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e12 kW\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eFuel\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eSplit logs, preferably hardwood \/ birch\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eCombustion Technology\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eNatural draft boiler\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eEfficiency at Rated Output\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e92.4 %\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eEnergy Efficiency Class\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eA+\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMax. Flow Temperature\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e90 °C\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMax. Operating Pressure\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e3.0 bar\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eBoiler Class\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e5 according to EN 303-5:2012\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eDraft Requirement\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e16 Pa\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eFlue Gas Temperature at Rated Output\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e124 °C\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eFlue Pipe Connection\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eØ 159 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eSafety Heat Exchanger\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eYes\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eBuffer Tank Recommended\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eYes, operation with heating buffer tank intended\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eHeight\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e1330 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eWidth\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e555 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eDepth\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e985 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eWeight\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eapprox. 311 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eVoltage\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e230 V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eFrequency\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e50 Hz\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eFuse Protection\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e1.25 A\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMax. Electrical Power Consumption\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e5 W\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eElectronic Control\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eElectronic draft regulator\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eInstallation\u003c\/h2\u003e \u003cp\u003eThe boiler must be installed by qualified specialist personnel in accordance with applicable regulations and manufacturer specifications. For operation, a suitable installation room, adequate combustion air supply, a professionally sized chimney, a return temperature boost of at least 65 °C, and the required safety devices must be provided.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eNotes\u003c\/h2\u003e \u003cp\u003eThe boiler is intended for natural split logs. The fuel must be dry and comply with the fuel parameters specified in the manufacturer's documentation. Before commissioning, maintenance, and operation, the operating instructions, installation specifications, and requirements for heating water, chimney, and safety devices must be observed.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eScope of Delivery\u003c\/h2\u003e \u003cul\u003e \u003cli\u003eDefro Firewood Plus 12 kW heating boiler\u003c\/li\u003e \u003cli\u003eOperating instructions\u003c\/li\u003e \u003cli\u003eElectronic draft regulator\u003c\/li\u003e \u003cli\u003eAnalog boiler thermometer\u003c\/li\u003e \u003cli\u003eSteel insert for the combustion chamber\u003c\/li\u003e \u003cli\u003ePrimary air flap\u003c\/li\u003e \u003cli\u003eCleaning tool set\u003c\/li\u003e \u003cli\u003eCast iron combustion grate\u003c\/li\u003e \u003cli\u003eTurbulator set\u003c\/li\u003e \u003cli\u003eSafety heat exchanger\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Defro","offers":[{"title":"Default Title","offer_id":49417794060636,"sku":"DFW12","price":2415.51,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/7796\/6428\/files\/defro-firewood-plus-12-kw-scheitholzkessel-effizienter-naturzugkessel-7782730.webp?v=1770692601","url":"https:\/\/lv.gemashop.de\/en\/products\/defro-malka-plus-12-kw-dabisks-velmes-katls-malkas-gazifikators","provider":"GEMA Shop","version":"1.0","type":"link"}