Fireplace Insert with Water Boiler Prity G W28 – 5 kW + 28.2 kW Water

The Fire for the Room. Serious Heat for a Bigger House.

The Prity G W28 is the higher-capacity sibling of the Prity G W18, built around the same steel-fronted body but stepped up with a 28.2 kW water heat exchanger and a larger 66-litre tank — enough to carry a bigger central heating load across more radiators. 5 kW of radiant heat still warms the room it stands in directly, while most of the fire's energy goes straight into your heating system.

Made in Bulgaria. EU Ecodesign compliant.

How Much Space Can It Heat?

Prity doesn't publish an official heated-area figure for the Prity G W28, so this is our own estimate, based on the heated-area-to-power ratio observed across comparable Prity models in our range (roughly 7.5 m² per kW). Here, that ratio applies to the unit's combined output of 33.2 kW — 5 kW radiating into the room plus 28.2 kW into the water circuit, which spreads its heat through radiators installed around the house rather than from the insert itself. Combined, that puts the Prity G W28 at approximately 250 m², depending on your home's insulation, radiator layout, and how the heating system is balanced.

A Large Firebox for Serious Burns

The combustion chamber measures 584 mm wide, 515 mm deep, and 410 mm high — sized to sustain the longer, hotter burns a larger boiler system needs to keep up with central heating demand. The ceramic glass door is kept clear by the secondary air wash system, which runs a continuous curtain of fresh air across the inner glass surface during burning.

A Larger Water Heat Exchanger for Bigger Homes

The Prity G W28 delivers 28.2 kW to its water heat exchanger at nominal output, alongside 5 kW of direct radiant heat into the room. The water tank holds 66 litres — the largest we've seen in this insert range — with a maximum working pressure of 1.25 bar and 1″ water connections for both flow and return.

This is a boiler-type appliance: it must be connected to a working central heating system before use, and should never be run dry or disconnected from your water circuit. Installation and commissioning by a qualified heating engineer is required.

Clean Combustion, Class A Efficiency

The Prity G W28 achieves a combustion efficiency (η) of 78.6% and a seasonal space heating energy efficiency of 70%, with an energy efficiency index of 105 — placing it in energy class A. Emissions at nominal output: CO at 1208 mg/Nm³, particulate matter at 30 mg/Nm³, NOx at 96 mg/Nm³, and OGC at 21 mg/Nm³ — all within EU Ecodesign limits.

Fuel consumption at nominal output is 10.5 kg of dry wood per hour, reflecting the larger heat exchanger's demand. Flue gas temperature is 258°C, with a mass flow rate of 25.3 g/s.

Important Installation Note

The Prity G W28 uses a Ø200 mm flue outlet and requires a minimum chimney draught of 12.2 Pa. Please confirm your chimney connection is compatible with this diameter before ordering. At 152 kg, this is one of the heavier inserts in our range — the unit needs a floor and framing capable of supporting the weight, and professional installation, including connection to your heating system, is required, not optional.

Overall dimensions: 750 × 580 × 870 mm (W × D × H).

30 Years of European Engineering Behind Every Weld

Prity has manufactured solid fuel heating appliances in Gorna Oryahovitsa, Bulgaria, since 1995. With more than 250 production staff and a range refined across three decades, the company builds inserts that earn their place in a home for years. Every unit is manufactured to the relevant EN standards and independently verified.

Your Prity G W28 comes with a 24-month manufacturer's warranty.

Everything You Get

• 5 kW of direct radiant heat, plus 28.2 kW to your water heat exchanger (33.2 kW combined)

• Large ceramic glass door — clear view of the fire, kept clean by the secondary air wash system

• 66-litre water tank, 1.25 bar maximum working pressure, 1″ water connections

• Class A energy efficiency with a seasonal space heating energy efficiency of 70%

• Combustion efficiency (η) of 78.6%

• Large firebox: 584 × 515 × 410 mm (W × D × H)

• Fuel consumption: 10.5 kg of dry wood per hour at nominal output

• Overall footprint: 750 × 580 mm

• Flue outlet: Ø200 mm — confirm chimney compatibility before ordering

• Net weight: 152 kg

• 24-month manufacturer's warranty

Box Contents

Insert body with ceramic glass door and integrated water heat exchanger, technical manual.

Use only dry, chemically untreated natural wood with a moisture content not exceeding 20%. Do not burn household waste, painted wood, plywood, or treated wood. This appliance must be connected by a qualified installer to a working central heating system before use — never operate it disconnected from your water circuit. Always consult a qualified installer before connecting the appliance to your chimney system. Note: this model requires a Ø200 mm flue connection and 1″ water connections.