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Why choose Cosmogas

For over 50 years Cosmogas has been designing, patenting and building the entire range in-house with the firm conviction that “quality makes the difference!”

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Complete range of water heaters and hot water producers from 27 to 280 kW

Cosmogas offers a wide range of boilers and condensing water heaters able to always provide the perfect solution for all residential, industrial and service sector applications, ensuring immediate availability of hot water in large quantity, without recovery times and even with different water withdrawal points.


With AGUAdens, Cosmogas sets a new goal in condensation technology. A newly developed gas water heater able to meet the needs of instantaneous hot water production, for households, offices, sports centres, shopping centres or large spaces in general, that require energy saving, comfort, ease of use, reliability and low environmental impact.

FRYO Pi, Cosmogas solution for heating, cooling and producing hot water

To meet the needs of industrial and residential buildings climate control during summer and winter, different for requested output, volume and structural characteristics of the buildings, Cosmogas designed FRYO Pi, a complete range of simple concept, silent and high-performance air condensing heat pumps.

ECOtwin & ECOtower perfect for class A buildings

The new ECO heat pumps from 6 to 13 kW are designed by Cosmogas to meet the needs of new low-energy households and they can heat the house and produce domestic hot water in winter and cool in summer, with high efficiency and cost-effective functioning, without using combustible gas.

Find out Cosmogas double condensing

Double condensing, double savings!

Mydens CRV + cuore

Cosmogas developed products able to ensure a record efficiency in every season, both in heating and in hot water production: this is possible because Cosmogas boilers offer all the benefits of condensing not only in heating but also in domestic hot water production.

This is why we talk about Double Condensing. Find out our range of double condensing boilers: MYdens and NOVAdens.

  • As can be seen in the diagram above, traditional condensing boilers have an efficiency loss during domestic hot water production, thereby increasing the consumption.
  • With Cosmogas double condensing boilers, the efficiency is always high both in heating and in domestic hot water production, achieving an ongoing saving throughout the year.

Choosing Cosmogas means choosing maximum Quality

50 years of experience in designing and producing have allowed us to develop innovative solutions, suited to modern world needs and most of which patented, to ensure maximum efficiency and high performance. All Cosmogas products are designed, patented and built by us.

Instant domestic hot water in large quantity

You save all year long, thanks to Double Condensing

Thanks to the micro-accumulation technology, your energy bill will be cheaper

Innovative solutions to use renewable energies

Cosmogas story and patents

Alberto Alessandrini
Interview with Arturo Alessandrini and Alberto Alessandrini

How do they work? During the operating, the return water is distributed into the series of coils, Ø16 and Ø18 mm. The benefit of this system is condensing with return water temperatures of 55/56°C and achieving great performance of the boiler even in radiator installations. In the R.S.C. heat exchanger the fluid circulation is radial shared, in the R.V.C. one it is radial variable.


The innovating premix system adopted in Cosmogas boilers and condensing generators enables an exceptional turndown ratio from 1:6 (NOVAdens 24K) to 1:20 (Mydens 280 T).


  • Turndown ratio from 1:6 to 1:20
  • Negative pressure gas valve
  • It also operates with low gas inlet pressure down to 7,5 mbar
  • Constant air/gas ratio

Cosmogas ecologic premix products have a constant air/gas ratio in each point of the burner’s turndown range, decreasing polluting emissions and streamlining efficiency. Cosmogas premix burner is made of a special metal fibre, “Fecralloy”, which develops short and perfectly fed flames.


  • High efficiency combustion
  • Low polluting emissions (CO<15 ppm and NOx<15 ppm)
  • NG, LP and Propane/Air operating

Cosmogas for Professionals

Ask for a quote

If you are interested in our products, ask for a quote and we will find the best solution for your needs!

Technical documentation

Are you looking for a document about one of our products? You will find them all here: from brochures, to manuals, to technical sheets.

Training courses

If you are a professional and you wish to attend a refresher or a specialisation course, come visit us at Cosmogas University!