Biasi RinNova Adaptive 30S System Boiler 30kW with Vertical Flue Kit

A system boiler is the right choice where high simultaneous hot water demand is required across multiple bathrooms, or where a cylinder is already installed. Because hot water is stored in a cylinder, several outlets can run at full flow simultaneously — unlike a combi, which is limited by the boiler's instantaneous heat input. The system boiler also eliminates loft cold tanks, reducing pipework and freeze risk.

The RinNova 30S system boiler has a simplified CH-only hydraulic circuit — no diverter valve, no internal DHW plate exchanger, and no DHW flowmeter are fitted. The hydraulic diagram shows two connections: CH flow and CH return. Hot water production is delegated entirely to the external cylinder, keeping the boiler's internal water path clean, low-resistance, and straightforward to service.

The Advanced Adaptive Gas Combustion Control system continuously reads the flame signal and adjusts both the gas valve and fan to maintain optimal CO₂ combustion at all times — regardless of changes in gas supply quality. One boiler model covers both Natural Gas (G20) and LPG (G31) with no mechanical conversion parts required; the gas type is selected and calibrated electronically by the engineer during commissioning.

The single-circuit stainless steel primary heat exchanger uses Biasi's patented mono-coil design with no junctions or welds — maintaining high efficiency even when retrofitted to older, less clean systems. Its oval cross-section promotes uniform water flow and self-cleaning circulation, preventing debris accumulation and making power-flushing straightforward at service.

The RinNova Adaptive's fully brass hydraulic manifold replaces the plastic assemblies of older designs. Brass handles pressure cycling without fatigue cracking, is completely recyclable, and eliminates a common failure mode in ageing boilers. Combined with cardboard (not polystyrene) packaging, it reflects Biasi's commitment to circular economy principles throughout the product lifecycle.

The factory-fitted modulating circulating pump (ErP-rated, Class A) circulates water through the primary heat exchanger and CH system, adjusting its speed in response to system demand. Available pump head at 1000 L/h is 320 mbar. Pump modulation percentage is readable in the boiler's Info display — useful during commissioning and when diagnosing low-flow conditions. The pump can be manually unlocked for servicing using a flat-head screwdriver on the central rotor plug.

The backlit LCD control panel displays CH temperature set-point, live system pressure, and operational status. Multi-function keys access Summer/Winter/Off modes, fault diagnostics (fault codes E01–E99 + L1), error history log, annual maintenance countdown, and the full programming menu — including Chimney Sweep (4 levels), Automatic Gas Calibration, and System Deaeration. Remote and external probe wiring accesses via the PCB terminal block.

The boiler achieves ErP Energy Class A as standard. Fitting the optional iControl system — comprising an advanced modulating room control, external temperature probe, WFC01 Wi-Fi module, and Biasi Connect App — raises the classification to A+. The probe connects to the external probe terminals on the PCB and allows the boiler to continuously modulate CH flow temperature in response to outdoor conditions, maximising condensing efficiency.

The three-piece removable casing provides quick access to all components. Safety systems include a flue temperature NTC probe and thermal fuse (E10 lockout above threshold), primary circuit pressure switch (E04 below minimum), by-pass valve as standard, and overheat thermostat (E02 lockout). Three automatic reignition attempts are made on ignition failure (E01) before lockout — reducing unnecessary service calls on intermittent ignition issues.