Family Externa is the Riello condensing boiler designed and manufactured specifically for outdoor installation.

The stainless steel primary heat exchanger and optimized domestic hot water heat exchanger make the boiler the ideal solution to meet the comfort requirements of even the most demanding user.

Family Externa is available in two combined models with power of 25 and 30 kW.

- Layout with electro-galvanized and zinc-magnesium finishes specifically for outdoor installation, top and bottom covers provided as standard.

- Frost protection up to -15°C as standard, electrical protection rating IPX5D

- Stainless steel primary condensing heat exchanger with front accessibility to the combustion chamber, smooth tube with high section and geometry with a single coil wound

- HIGH PERFORMANCE optimized plate sanitary exchanger

- Native Hybrid Ready system with color Energy Manager REC10 MH remote control panel supplied as standard

- Low consumption modulating circulator with 7m head curve

- Hydrogen Ready 20%: arranged to operate with mixtures of natural gas and hydrogen, up to a maximum 20%

- 9 liter side expansion tank

- 1:8 modulation ratio

- 93% seasonal efficiency

- C10 certification: possibility of installation in pressurized collective flues via optionally available clapet valve

- Easy plant loading system

- Hydraulic group with Riello standard connection sequence