{"product_id":"wood-burning-boiler-stove-prity-s3-w21-4-8-kw-21-kw-water","title":"Wood burning boiler stove Prity S3 W21 - 4.8 kW + 21 kW Water","description":"\u003ch1 style=\"text-align: center;\"\u003ePrity S3 W21 Wood-Burning Boiler Stove – 4.8 kW + 21 kW Water\u003c\/h1\u003e\n\u003ch2\u003eThe Top of the S3 Range for Central Heating.\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003ePrity S3 W21\u003c\/strong\u003e is the most powerful boiler stove in the S3 line: up to \u003cstrong\u003e21 kW\u003c\/strong\u003e to your central heating water circuit, with a smaller 4.8 kW radiating directly into the room. A larger water jacket than the S3 W17 makes this the choice for bigger homes with more radiators to feed. Ivory tile side cladding gives it a warmer look than the plain steel boiler stoves elsewhere in this range.\u003c\/p\u003e\n\u003cp\u003eClass \u003cstrong\u003eA energy efficiency\u003c\/strong\u003e. Simple primary air control. Over 30 years of Bulgarian engineering behind it.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eHow Much Space Can It Heat?\u003c\/h2\u003e\n\u003cp\u003eWith its combined radiant and water heat output, the S3 W21 is suitable for heating spaces of up to approximately 160 m², dependent on your central heating setup, insulation, and room layout. Most of its output is designed to travel through your radiators rather than stay in the room where it's installed.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eA Water Heat Exchanger Built for Serious Central Heating\u003c\/h2\u003e\n\u003cp\u003eThe S3 W21 delivers \u003cstrong\u003e16.4 kW nominal, up to 21 kW maximum\u003c\/strong\u003e to its water heat exchanger, with a \u003cstrong\u003e29-litre water jacket\u003c\/strong\u003e and \u003cstrong\u003e1″ connections\u003c\/strong\u003e for both flow and return. Maximum operating pressure is \u003cstrong\u003e1.25 bar\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIts flue gas temperature of \u003cstrong\u003e221°C\u003c\/strong\u003e reflects how much of the fire's energy is being extracted into the water circuit rather than lost up the chimney.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis is a boiler-type appliance: it must be connected to a working central heating system before use, and must never be operated dry or disconnected from your water circuit.\u003c\/strong\u003e Installation and commissioning should be carried out by a qualified heating technician.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eIvory Tile Cladding\u003c\/h2\u003e\n\u003cp\u003eThe S3 W21's side panels are finished in ivory ceramic tile rather than plain steel — a warmer, more traditional look than the black steel boiler stoves elsewhere in this range.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eSimple, Direct Air Control\u003c\/h2\u003e\n\u003cp\u003eThe S3 W21 is built around a single \u003cstrong\u003eprimary air control\u003c\/strong\u003e. Open it to light the fire and build a strong flame quickly; close it down once combustion is established to slow the burn and extend your fuel. It's a straightforward system with fewer moving parts — easy to operate, easy to maintain.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eClass A. EU Certified. Ready for European Winters.\u003c\/h2\u003e\n\u003cp\u003eThe S3 W21 carries an \u003cstrong\u003eEnergy Efficiency Class A\u003c\/strong\u003e rating, with an \u003cstrong\u003eEnergy Efficiency Index of 100\u003c\/strong\u003e. It meets the full requirements of \u003cstrong\u003eEU Ecodesign Regulation 2015\/1185\u003c\/strong\u003e, making it fully compliant for installation and use across all EU member states.\u003c\/p\u003e\n\u003cp\u003eIts \u003cstrong\u003e66% seasonal heating efficiency\u003c\/strong\u003e reflects real-world performance across an entire heating season — not just peak laboratory conditions.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e30 Years of European Engineering Behind Every Weld\u003c\/h2\u003e\n\u003cp\u003ePrity has been manufacturing solid fuel heating appliances in Gorna Oryahovitsa, Bulgaria since 1995. Every Prity stove is manufactured to \u003cstrong\u003eBDS EN 13240\u003c\/strong\u003e, the European standard for solid fuel room heaters, and independently verified by \u003cstrong\u003eTÜV NORD\u003c\/strong\u003e — one of Europe's most respected technical certification authorities.\u003c\/p\u003e\n\u003cp\u003eYour S3 W21 comes with a \u003cstrong\u003e24-month manufacturer's warranty\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eEverything You Get\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003e4.8 kW radiant heat + up to 21 kW to your water heat exchanger — suitable for spaces up to approximately 160 m², depending on your central heating setup\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003eIvory ceramic tile side cladding\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003e29-litre water jacket, 1″ connections, 1.25 bar maximum operating pressure\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003eEnergy Efficiency Class A with 66% seasonal heating efficiency (EEI 100)\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003eSingle primary air control — simple, direct operation\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003eWide firebox (430 × 425 × 295 mm)\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003eHeat-resistant ceramic glass door — clear view of the fire\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003eFootprint: 570 × 530 mm floor space required\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003eFuel consumption: 7.0 kg of wood per hour at rated output\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003eMinimum chimney draught: 11 Pa\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003eFlue outlet diameter: Ø130 mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003eNet weight: 133 kg\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003eFull EU Ecodesign compliance — legal to install and operate across the EU\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003eTÜV NORD certified\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• \u003c\/span\u003e24-month warranty\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cp\u003eStove body with tile cladding and integrated water heat exchanger, door with heat-resistant ceramic glass, ash drawer, handle set with latch, technical manual.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cem\u003eUse only dry, chemically untreated natural wood or wood briquettes without adhesives. Wood moisture content must not exceed 20%. Do not burn household waste, painted wood, plywood, or impregnated timber. This appliance must be connected to a working central heating system by a qualified installer before use — never operate it disconnected from your water circuit. Always consult a qualified installer before connecting the appliance to your chimney system.\u003c\/em\u003e\u003c\/p\u003e","brand":"Prity","offers":[{"title":"Default","offer_id":53872888971611,"sku":null,"price":19510.0,"currency_code":"CZK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0985\/8066\/0571\/files\/s3w21.jpg?v=1787586511","url":"https:\/\/eustoves.com\/products\/wood-burning-boiler-stove-prity-s3-w21-4-8-kw-21-kw-water","provider":"EUstoves.com","version":"1.0","type":"link"}