Floor-standing condensing boiler with built-in stratified buffer tank VSC 306/4-5 90 ecoCOMPACT 0010014679

Floor-standing boiler with integrated stratified buffer tank – one device, two tasks

This is not a standard boiler – it integrates heating and domestic hot water (DHW) preparation in a single, compact unit. The 90-liter buffer tank is built as a stratified tank, meaning hot water remains at the top while cold water enters at the bottom – without mixing. As a result, you can utilize up to 287 liters of hot water within 10 minutes with a temperature drop of 30°C, without the risk of “running out” during repeated use.

An efficiency of 108% (Hi) is not marketing – it results from recovering heat from water vapor in the flue gases. This means the boiler extracts more energy from gas than conventional units. In practice: less gas for heating and DHW, lower bills. In DHW preparation mode, efficiency reaches up to 102%, confirming its effectiveness even under high demand.

For the installer – simple installation and flexibility

Dimensions of 1320 x 599 x 693 mm and a weight of 112 kg (without water) allow installation even in limited spaces – no separate boiler room or external buffer tank is required. Installation is standard: gas, water, and flue gas connections (60/100 mm) are designed for easy compatibility with existing systems. The boiler operates with a sealed combustion chamber – it does not require supply air ventilation in the room, simplifying boiler room design.

Modulating power from 6.6 kW to 34 kW (during DHW heating) allows precise adaptation to the load – ideal for both small single-family homes and larger apartments. Operation in low-temperature mode (e.g., underfloor heating) or high-temperature mode (radiators) poses no problem.

For the user – continuous access to hot water and quiet operation

You do not need to wait for the buffer tank to heat up – the system reacts immediately upon opening the tap. The continuous flow rate is 976 liters per hour, meaning you can simultaneously wash dishes, take a shower, and run the washing machine without any temperature drop. The casing is aesthetic and compact – it does not resemble a “boiler room” but rather modern household equipment.

Compliant with the ErP 2015 directive, the boiler meets the latest energy requirements. Class A for heating and DHW confirms its efficiency – no energy is wasted on unnecessary heating cycles or heat losses.