Description

FAMAR GEYSIR WOOD 5S multi-fuel automatic boiler

The Geysir Wood 5S boiler represents a real revolution in the wood-pellet boiler market.

Capable of automatically switching from one fuel to another while keeping the power transferred constant. The user can choose to operate only wood, only pellets or in combined mode. Equipped with a single and large combustion chamber with bottom loading, it is able to burn any type of wood, pellets and multi-fuel at the highest levels of efficiency. Characterized by very high performance and very low emission values. Complies with the most advanced European industry regulations.

Technical Data

kW 34.3

GEYSIR WOOD 5S Elements

1 – Fume extractor

2 – Multi-fuel containment tank (about 80 kg) 3 – Three-phase gearmotor for multi-fuel power supply

4 – Combustion air fan

5 – Automatic ignition system (glow plug + blower) 6 – Ash collection drawer 7 – Heat exchanger with thermolytic fins (high efficiency 92%) 8 – Coils for rapid production of domestic hot water and for safety with connection to the thermal discharge valve 9 – Cast iron burner (multi-fuel supply from below) 10 – Rotary Valve (Mechanical Backfire Safety) 11 – Double Jump Fuel System

Hydraulic Information

1 – Warning: Even if the smoke outlet duct has a diameter of 100 mm, use a flue with an internal diameter greater than or equal to 150 mm. To make a suitable connection to the flue duct to reduce any noise during the smoke escape phase, use 100-120 and 120-150 fittings.

2 – Vent valve 3 – DHW flow switch 4 – ISPESL safety valve outlet 2.5 bar Ø 26 mm 5 – Safety valve outlet 2.5 bar Ø 21 mm 6 – Expansion valve 10 L 7 – System delivery Ø 1″ M 8 – DHW outlet Ø 1/2″ M

9 – Thermal drain valve outlet Ø 3/4″ M 10 – Domestic water/mains water inlet Ø 1/2″ M 11 – High efficiency primary system circulator 12 – System return Ø 1″ M 13 – High efficiency circulator for anti-condensation function and rapid DHW 14 – Boiler drain tap

ALL-ITALIAN TECHNOLOGY AND FUNCTIONALITY

The Geysir Wood 5S is able to burn wood, pellets, multi-fuel or in combined mode without problems.

Once the boiler has been prepared for ignition (by inserting wood into the combustion chamber and the pellets/multi-fuel into the tank), the glow plug with its blower causes the pellet/multi-fuel to ignite, which in turn triggers the ignition of the wood. When the wood reaches a suitable combustion, the electronic control blocks the supply of pellets/multi-fuel and the boiler will run exclusively on wood. When the boiler is exhausted, it automatically restarts with pellets/multi-fuel. If the system no longer requires energy, Geysir is placed on standby , minimizing wood burning, automatically closing the combustion air inlet. If the boiler is working exclusively with pellets/multi-fuels, it is possible to load the wood normally from the hatch. When the door is opened, an actuator opens the smoke by-pass damper, making them pass directly through the flue, increasing the flow rate of the extractor. This prevents the abnormal exit of fumes into the technical room. The same principle applies in the case of pellet/multifuel operation.

GEYSIR “BURNS” PLANT BIOMASS OF ANY TYPE WITH INNOVATIVE BOTTOM LOADING SYSTEM

The large tank is connected by a double jump screw plus rotary valve to the circular cast iron burner. Advanced bottom-loading technology allows you to take advantage of multiple benefits:

• absence of burner cleaning;

• clean white flame and always with the right amount of oxygen;

• reduction of fuel used. When the boiler is placed on standby, it does not use any other fuel for new restarting, but uses the ember effect to start again;

• possibility of using pellets and biomass of any type and quality. Theburner equipped with a removable ring, once removed, is able to burn even more difficult fuels as the surface is larger with additional holes for combustion.

SELF-CLEANING

The Geysir Wood heat exchanger is self-cleaning due to the thermolytic surfaces it contains, so only ash and fine dust are deposited which must be removed only once a year for cleaning and extraordinary maintenance.

THE GEYSIR WOOD EXCHANGER

Designed and sized with fluid dynamics software, the heat exchanger (Famar patent) consists of fins with 24 smoke pass passes. Fully automated: An actuator opens or closes the bypass dampers by changing the passage of flue gas into the flue or dry chamber heat exchanger.

Specially studied and designed with narrow and long passages, with nailed fins in the center in order to ensure the overheating of the internal walls to the passage of fumes. The incandescence of the internal contact surfaces burns the unburnt materials carried by the fumes, transforming them into ash, which remains on the internal surfaces due to the cyclone effect of abatement, as well as recovering additional energy (greater efficiency) which is transferred to the water.

Discover the quality details

Available in a 34.3 kW version.
High efficiency of over 90% for both wood and pellets.
Heat exchanger consisting of fins with 24 dry chamber smoke passages that allows the unburnt materials to be burned, avoiding the formation of creosote that would clog the passages, reducing the efficiency of heat exchange.
Automatic switching from one fuel to another and the ability to maintain a constant temperature in the combustion chamber regardless of the fuel used.
Large combustion chamber, 176 liters volume.
Innovative ignition for difficult fuel ignition with glow plugs and brushless fan.
Automatic combustion air management for both wood and pellets.
Automatic smoke management valve and forced extraction of the same.
Maintenance and assistance reduced to a minimum, large ash pan.
Equipped with everything you need for the hydraulic interface already closed as standard with double safety valve and thermal drain valve.
Fuel loading from below with innovative rotary valve.
Domestic hot water production even in summer mode (standard)
Touch display for programming and possibility of boiler control via GSM/GPRS or WI-FI module with dedicated App application (on request)

2 reviews for FAMAR GEYSIR WOOD 5S multi-fuel automatic boiler (Copia) (Copia)

Rated 4 out of 5

Giulia De Luca (verified owner) – 17 February 2026

Ho acquistato il puffer salvaspazio FAMAR modello WATERWALL 650 L per migliorare l’efficienza del mio impianto di riscaldamento domestico e devo dire che ne sono rimasto estremamente soddisfatto. Il sistema di stratificazione avanzato ha permesso un notevole risparmio energetico e una distribuzione uniforme dell’acqua calda in tutta la casa. Consiglio vivamente questo prodotto a chiunque voglia migliorare le prestazioni del proprio impianto di riscaldamento.
Rated 5 out of 5

Giovanna Rinaldi (verified owner) – 13 March 2026

Ho acquistato il puffer salvaspazio FAMAR modello WATERWALL 650 L e devo dire che sono rimasto davvero impressionato dalla sua efficienza e praticità. Il sistema di stratificazione avanzato ha permesso di ottenere una distribuzione uniforme dell’acqua calda in casa mia, garantendo un comfort costante e un risparmio energetico notevole. Inoltre, il design compatto e moderno si è integrato perfettamente nell’ambiente domestico, occupando pochissimo spazio. Consiglio vivamente questo prodotto a chiunque voglia migliorare il proprio sistema di riscaldamento con una soluzione innovativa e affidabile.