Prity S3 W17 Wood-Burning Boiler Stove – 4.7 kW + 17 kW Water

Built for Serious Central Heating.

The Prity S3 W17 sends the bulk of its output to your central heating system — up to 17 kW to the water circuit, with a smaller 4.7 kW radiating directly into the room. A larger firebox and water jacket than the S3 W13 make this the step up for bigger homes. Ivory tile side cladding gives it a warmer look than the plain steel boiler stoves elsewhere in this range.

Class A energy efficiency. Simple primary air control. Over 30 years of Bulgarian engineering behind it.

How Much Space Can It Heat?

With its combined radiant and water heat output, the S3 W17 is suitable for heating spaces of up to approximately 135 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.

A Water Heat Exchanger Built for Serious Central Heating

The S3 W17 delivers 13.1 kW nominal, up to 17 kW maximum to its water heat exchanger, with a 23-litre water jacket and 1″ connections for both flow and return — larger than the 3/4″ connections used on smaller boiler stoves in this range. Maximum operating pressure is 1.25 bar.

Its flue gas temperature of just 190°C reflects how much of the fire's energy is being extracted into the water circuit rather than lost up the chimney.

This 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. Installation and commissioning should be carried out by a qualified heating technician.

Ivory Tile Cladding

The S3 W17'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.

Simple, Direct Air Control

The S3 W17 is built around a single primary air control. 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.

Class A. EU Certified. Ready for European Winters.

The S3 W17 carries an Energy Efficiency Class A rating, with an Energy Efficiency Index of 100. It meets the full requirements of EU Ecodesign Regulation 2015/1185, making it fully compliant for installation and use across all EU member states.

Its 67% seasonal heating efficiency reflects real-world performance across an entire heating season — not just peak laboratory conditions.

30 Years of European Engineering Behind Every Weld

Prity has been manufacturing solid fuel heating appliances in Gorna Oryahovitsa, Bulgaria since 1995. Every Prity stove is manufactured to BDS EN 13240, the European standard for solid fuel room heaters, and independently verified by TÜV NORD — one of Europe's most respected technical certification authorities.

Your S3 W17 comes with a 24-month manufacturer's warranty.

Everything You Get

• 4.7 kW radiant heat + up to 17 kW to your water heat exchanger — suitable for spaces up to approximately 135 m², depending on your central heating setup

• Ivory ceramic tile side cladding

• 23-litre water jacket, 1″ connections, 1.25 bar maximum operating pressure

• Energy Efficiency Class A with 67% seasonal heating efficiency (EEI 100)

• Single primary air control — simple, direct operation

• Wide firebox (430 × 425 × 278 mm)

• Heat-resistant ceramic glass door — clear view of the fire

• Footprint: 570 × 530 mm floor space required

• Fuel consumption: 6.3 kg of wood per hour at rated output

• Minimum chimney draught: 11 Pa

• Flue outlet diameter: Ø130 mm

• Net weight: 117 kg

• Full EU Ecodesign compliance — legal to install and operate across the EU

• TÜV NORD certified

• 24-month warranty

What's in the Box

Stove body with tile cladding and integrated water heat exchanger, door with heat-resistant ceramic glass, ash drawer, handle set with latch, technical manual.

Use 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.