Garanzia Italiana 24 mesi
SKU: CALD_278_coassiale


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  • Product code: 3300735
  • Energy label specifications according to the European ErP directive
  • Class A heating energy efficiency
  • DHW energy efficiency profile XL Class A
  • Heating/DHW operation characteristics:
  • For heating and domestic hot water production
  • Forced draft sealed chamber
  • Nominal heat input in heating max/min kW 22/2.5
  • Max/min heating thermal power (80°C-60°C) kW 21.5/2.4
  • Efficiency at nominal heat input (60/80°C) % 97.8
  • Efficiency at nominal heat input (30/50°C) % 106.2
  • Efficiency at 30% at 30°C % 109
  • Performance stars (dir. 92/42/EEC) ★★★★
  • Min/max heating temperature (high temperature range) °C 35/82
  • Min/max heating temperature (low temperature range)°C 20/45
  • Specific flow rate in DHW (10 min. with ∆T=30°C) litres/min 12.2
  • Quantity of hot water ∆T=25°C litres/min 14.6
  • Quantity of hot water ∆T=35°C litres/min 10.4
  • Comfort performance stars (EN13203) ★★★
  • Power supply voltage/frequency V/Hz 230 / 50
  • Total electrical power absorbed W 70
  • Degrees of protection for the electrical system IP X5D
  • Dimensions (H x W x D) 770/505/240 mm
  • Extremely small dimensions to adapt to any space problem.
  • METHANE fueled
  • Ariston condensing boilers

Genus Premium Evo EXT

  • Genus Premium Evo EXT is the wall-mounted condensing boiler designed for outdoor installation. Thanks to its small size and low weight, installation is extremely simple. This without giving up the safety that distinguishes Ariston, i.e. exceptional resistance to cold (down to -15°C) and electrical protection from water and dust that reaches the highest levels (IPX5D classification). High efficiency product with reduced consumption thanks to the 1:10 modulation ratio and the high efficiency circulator with continuous modulation.
  • Wall-mounted outdoor condensing boiler with auto function
  • Sensys system manager with integrated time programming
  • Continuously modulating high efficiency circulator
  • Electro-galvanised covering for outdoors
  • Possibility of outdoor installation thanks to all protection systems from atmospheric agents.
  • Prepared for integration into system configuration through the new Bridgenet® Bus communication protocol
  • Provision for multi-zone and multi-temperature thermoregulation
  • Preparation for management of solar systems
  • Auto and comfort function
  • External probe integrated into the boiler
  • Semi-automatic filling
  • Anti-freeze, anti-limescale and anti-blocking protection for the circulator
  • Stainless steel isothermal primary exchanger
  • Increased sanitary exchanger
  • Cold water inlet and heating return filters

Comfort function:

The Comfort function speeds up the delivery of domestic hot water, reducing waiting times to just 5”. It is possible to customize this performance by choosing between two modes of use:

  • COMFORT PLUS (hot water immediately ready every time the tap is opened in just 5 seconds)
  • COMFORT (hot water ready for 30 minutes after the last withdrawal so as not to give up savings)
  • Car function:

It is possible to truly combine maximum comfort with reduced consumption, thanks to the intelligent management logic of the new boilers and the new technology that governs them. By activating the AUTO function, the Ariston boiler chooses the best operating mode based on the environmental conditions, the connected external devices and the required performance. It is impossible to compare this ability to interpret and respond to external stimuli with what has been achieved so far. AUTO fears no comparison

Acoustic Comfort

  • Acoustic comfort is further guaranteed by the introduction of the new silencer. For the Genus Premium Evo EXT thanks also to the high modulation ratio of 1:10, the continuously modulating pump and the presence of lateral sound-absorbing panels.
  • High efficiency circulator with continuous modulation:
  • It allows automatic adaptation of power based on the temperature of the system, guaranteeing the performance of the boiler and the reduction of electricity consumption.
  • Optimization of thermal efficiency.
  • Optimization of comfort with constant temperature.
  • Maximum silence.
  • High efficiency
  • Condensation technology allows for high energy efficiency to be achieved thanks to the increase in calorific value generated by the reuse of the energy of exhaust fumes, allowing for superior thermal efficiency. The future of the planet and your comfort are the main objective of Ariston's condensing technology

Product Warranty
All products for sale on our site are new and packaged. The warranty on this item is 24 months from the date of purchase


Scheda Tecnica

  • peso: 35.0 kg
  • classe energetica produzione acs: A
  • classe energetica riscaldamento: A
  • gas: Methane
  • marca: Ariston
  • metri quadri : 150
  • modello: 99484071
  • potenza in kw: 25
  • potenza nominale: 25
  • superficie riscaldabile mq: 150
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