Garanzia Italiana 24 mesi
SKU: CALD_2038


€1.174,00 VAT included
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Technical specifications


Technical data according to ErP directives

Heating energy efficiency class: A

Energy efficiency class in sanitaryware: A

Load profiles: XLÿ

Technical features:

Minimum/Nominal useful power kWÿ4.3 ú 32.0

Minimum heat input with Metan/Propaneÿ4.4 / 5.6

Efficiency class:ÿ

Rated yield in CONDENSATION % 102.3

Yield at 30% of load% 98.1

NOx class 5

Operating temperature in heatingmin./maxøC 30 - 85

Adjustable temperature in sanitary øC 38 ú 60

Mixed DHW production with t 25 l/min 18.3

Supply voltageÿV-Hz 230/50

IP protection ratings X5D

Dimensions HxWxD mm 700x420x345; 36.5 kg

Main features


ALDENS the new SAVIO range of wall-mounted condensing boilers: excellent performance thanks to the aluminum heat exchanger and simplicity of use thanks to the control panel with knobs and display. Available in the combi version which combines the heating function and the production of domestic hot water. ALDENS presents a complete range of powers, 24 and 35 kW combi in the same extremely compact dimensions (700 x 420 x 345 mm). ALDENS has its strength in the innovative Al/Si/Mg primary heat exchanger with low water content designed to provide high yields that last over time. The digital display communicates the boiler's operating parameters to the user easily and conveniently. Like the entire SAVIO ALDENS condensing range, it allows you to get the most savings from climate thermoregulation, based on the system in which the boiler is installed.

Main features:

Exceptional 1:8 fine modulation ratio

Efficiency>107% (ex dir. CE 92/42)

Ultra-flat Al/Si/Mg primary exchanger

Electronics with HWS or Hot Water Speed ​​function?

Low NOx (class 5 according to EN 297 and EN 483) thanks to the modulating premix burner

Fine hot water production 13.3 l/min t 25 with special exchanger with 12 plates (24 kW model) and 16 plates (35 kW model) in stainless steel

Maintenance or Pit stop?

simple and intuitive control panel

High efficiency modulating circulator (in line with Dir. ErP 2015)

Sanitary exchanger

Sanitary comfort is ensured by the plate exchanger suitably sized to guarantee the best performance in terms of domestic hot water, reducing waiting times and guaranteeing temperature stability.

Modulating circulator with deaerator

It represents the state of art in the standard of high efficiency. In line with the 2015 ErP directive, with less than 1 W of consumption in stand-by and only 45 W in maximum operation, thanks to the wide modulation capacity, based on the request of the room thermostat and the temperatures detected by the sensors placed in the flow/return , automatically doses the boiler power to the needs of the system. Particularly silent and compact, it integrates with the safety valve, the by-pass and the drain cock.

Exclusive Ai/Si/Mg exchanger

It is made of a special Aluminium/Silicon/Magnesium alloy which ensures efficiency and resistance over time. Thanks to the internal heat exchange configuration, efficiencies of over 107% can be achieved in condensation mode, which means great economic savings and very low environmental impact for the user. The 35 kW version adequately increased.


Manage 2 zones with 2 thermostats: versatile ALDENS. Ideal for all systems, thanks to the electronics that allow you to manage 2 different temperature heating zones (high for radiators and fan-coils, low for radiant panel systems) controlling them with both modulating and dedicated on-off thermostats.

Anti-overheating post-circulation: 15 seconds, maintains the thermal balance between the flow and return, even after intense DHW withdrawals, while in heating, with a duration of 5 minutes, it allows to dispose of all the residual thermal inertia.

Sliding temperature operation:ÿFor maximum operating economy.ÿ

Antifreeze protection: It intervenes at 5øC and is activated in both sanitary and heating, bringing the temperature in the boiler to 15øC. This avoids the risk of ALDENS freezing if low temperatures persist in the room where it is installed. If there is a lack of gas, the block signal will appear on the display

pump anti-blocking: pump blocking is avoided following long stops thanks to an automatic 5 second pulse that the electronics sends to the engine every 24 hours of stop

The multifunction, timed backlit LCD display allows:

Reading of temperatures in heating and sanitary ware

Display of flame failure block

Error code display

Fault signaling of operating anomaly

Operating/stand-by states

Burner operating status

Diagnostics with reporting of 11 anomalies

Ecodesign Directive: new condensing boilers from 2015

After very long negotiations, the Ecodesign regulation was approved, which introduces a new energy labeling on the minimum efficiency standards for boilers. In particular, an energy classification from A+ to G is provided for space heating appliances and from A to G for domestic hot water production appliances. "Hence the obligation to install only condensing boilers, heat generators capable of recovering a large part of the latent heat contained in the fumes which, otherwise, would be lost in the chimney" as happens in traditional boilers. The recovered heat is transferred to the heating system, allowing to reach an efficiency of 106% compared to 92% of the traditional boiler and 84/85% of an old traditional generator. The installation obligation concerns boiler manufacturers who will no longer be able to place those on the market non-condensing starting from 26 September 2015. This means that starting from this date, anyone who wants to install a boiler in their home will have to install only condensing models. Only one particular type of non-condensing boiler will continue to be produced which is technically called oa open room? to be installed... when it is not possible to replace an old boiler with a condensing boiler... due to problems related to the collective flue... of some multi-family buildings.

Products for water and space heating represent approximately 30% of internal energy consumption in Europe.

Designing eco-friendly products and promoting high-performance technologies to end users in 2020 will determine:

An annual energy saving equivalent to 56 million tonnes of oil, quantifiable as the savings obtained if the water and environmental heating systems of two nations as large as Italy were deactivated.

As of 26 September 2015, ErP regulation and energy labeling will be applied in Europe to water and space heating products (boilers, heat pumps, micro-CHP devices, water heaters, and hot water storage tanks) û.

How to read energy labels

There are different labels, based on the type and functions of the product (room water heating only of both, and in this case the label must show both classifications).

In addition to the energy class, the label provides other information that could be useful for understanding which product has the lowest environmental impact (for example, power and consumption in different climate zones, noise, etc.).

It is possible to increase the energy efficiency of hot water production and space heating by connecting several products and accessories to a system. In this case it is necessary to prepare a system label in addition to that relating to the individual product


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


From the day payment is received, the product will be shipped within 3 working days. Free insured shipping for Italy. Shipping will take place via one of the national carriers

Scheda Tecnica

  • peso: 35.0 kg
  • classe energetica produzione acs: A
  • classe energetica riscaldamento: A
  • gas: Methane
  • marca: Wise
  • metri quadri : 250
  • modello: ALDENS 35 METANO
  • potenza in kw: 35
  • potenza nominale: 35
  • superficie riscaldabile mq: 250
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