Condensing boilers
Nuvola Duo-tec+
Combi condensing boilers with DHW storage
READ MOREThe range of Nuvola Duo-Tec+ condensing boilers is characterized by long term reliable performance.
The 40-litres storage tank delivers hot water as soon as you turn on a tap.
The 1:7 modulation means efficiency and savings thanks to the reduction of boiler on/off cycles.
The range of Nuvola Duo-Tec+ condensing boilers is characterized by long term reliable performance.
The 40-litres storage tank delivers hot water as soon as you turn on a tap.
The 1:7 modulation means efficiency and savings thanks to the reduction of boiler on/off cycles.
![](https://international.baxi.it/storage/app/media/Products/Condensing-boliers/nuvola-duo-tec/nuvola-duo-tec-1.jpg)
![](https://international.baxi.it/storage/app/media/Products/Condensing-boliers/nuvola-duo-tec/nuvola-duo-tec-2.jpg)
Characteristics
- Modulation up to 1:7 reduces on-off cycles for improved efficiency and savings. Silent and durable, delivering a stable comfort
- Automatic combustion control to maintain constantly the highest level of efficiency
- Up to 500 lt DHW in 30 minutes (∆T 30°C)
- Stainless steel 40-litre tank
- Digital control panel with back-lit LCD display
- Remote control Baxi Mago as optional
- DHW expansion vessel (mod. 33 GA VES)
- Connection pipes supplied as standard
details
Power KW
24, 33
destination
Residential
mounting
Wall hung
Power KW
24, 33
destination
Residential
mounting
Wall hung
Features
![](https://international.baxi.it/storage/app/media/features/digitalready.png)
digital ready
It can be connected to BaxiMAGO, the WI-FI smart modulating thermostat, and Baxi service App. You can have your boiler always under control
![](https://international.baxi.it/storage/app/media/features/hybridready.png)
hybrid ready
It facilitates the integration of other heating sources, such as heat pumps and solar thermal, simplifying the climate management of your home
gas adaptive control
It automatically detects the kind of gas and continuously adjusts the gas-to-air ratio for the highest quality combustion and savings
1:7 modulation
Modulation up to 1:7 reduces on-off cycles for improved efficiency and savings
![](https://international.baxi.it/storage/app/media/features/digitalready.png)
It can be connected to BaxiMAGO, the WI-FI smart modulating thermostat, and Baxi service App. You can have your boiler always under control
![](https://international.baxi.it/storage/app/media/features/hybridready.png)
It facilitates the integration of other heating sources, such as heat pumps and solar thermal, simplifying the climate management of your home
It automatically detects the kind of gas and continuously adjusts the gas-to-air ratio for the highest quality combustion and savings
Modulation up to 1:7 reduces on-off cycles for improved efficiency and savings
Technical Specification
models | 16 | 24 | 33 | |
---|---|---|---|---|
ErP data | ||||
Rated heat output | kW | 12 | 20 | 28 |
Useful heat output at rated heat output and high temperature regime(2) P4 | kW | 12 | 20 | 28 |
Useful heat output at 30% of rated heat output and low temperature setting(1) P1 | kW | 4 | 6,7 | 9,4 |
Space heating – Seasonal energy efficiency ƞs | % | 93 | 93 | 93 |
Useful efficiency at rated heat output and high temperature setting(2) ƞ4 | % | 88,1 | 88 | 88 |
Useful efficiency at 30% of rated heat output and low temperature setting(1) ƞ1 | % | 98 | 98 | 98,1 |
Sound power level, indoors LWA | dB | 52 | 49 | 53 |
Declared load profile | XL | XL | XL | |
Heat input/output | ||||
Rated heat input (Qn) for domestic hot water | kW | 16,5 | 24,7 | 34 |
Rated heat input (Qn) for heating | kW | 12,4 | 20,6 | 28,9 |
Rated heat output (Pn) for domestic hot water | kW | 16 | 24 | 33 |
Rated heat output (Pn) 80/60 °C for heating | kW | |||
Rated heat output (Pn) 50/30 °C for heating | kW | 13,1 | 21,8 | 30,6 |
Heating circuit | ||||
Temperature range for heating circuit | °C | 25/80 | 25/80 | 25/80 |
Water capacity of expansion vessel | l | 7,5 | 7,5 | 7,5 |
Domestic water circuit | ||||
Temperature range for domestic water circuit | °C | 35/60 | 35/60 | 35/60 |
Domestic water production with ΔT = 25 °C | l/min | 9,2 | 13,8 | 18,9 |
Domestic water production with ΔT = 35 °C | l/min | 6,6 | 9,8 | 13,5 |
Combustion | ||||
Diameter of separate discharge pipes | mm | 80/80 | 80/80 | 80/80 |
Diameter of coaxial discharge pipes | mm | 60/100 | 60/100 | 60/100 |
Nitrogen oxide emissions NOx | mg/kWh | 22 | 15 | 15 |
Flue gas mass flow rate (max) | kg/sec | 0,008 | 0,012 | 0,016 |
Flue gas mass flow rate (min) | kg/sec | 0,001 | 0,002 | 0,002 |
Electrical characteristics | ||||
Power supply voltage | V | 230 | 230 | 230 |
Power supply frequency | Hz | 50 | 50 | 50 |
Rated electric power | W | 76 | 88 | 108 |
Dimensions | ||||
Humidity protection rating (EN 60529) | IP | X5D | X5D | X5D |
Net weight | kg | 62 | 62 | 62 |
Dimensions (height/width/depth) | mm | 950/600/466 | 950/600/466 | 950/600/466 |
models | 16 | 24 | 33 | |
---|---|---|---|---|
ErP data | ||||
Rated heat output | kW | 12 | 20 | 28 |
Useful heat output at rated heat output and high temperature regime(2) P4 | kW | 12 | 20 | 28 |
Useful heat output at 30% of rated heat output and low temperature setting(1) P1 | kW | 4 | 6,7 | 9,4 |
Space heating – Seasonal energy efficiency ƞs | % | 93 | 93 | 93 |
Useful efficiency at rated heat output and high temperature setting(2) ƞ4 | % | 88,1 | 88 | 88 |
Useful efficiency at 30% of rated heat output and low temperature setting(1) ƞ1 | % | 98 | 98 | 98,1 |
Sound power level, indoors LWA | dB | 52 | 49 | 53 |
Declared load profile | XL | XL | XL | |
Heat input/output | ||||
Rated heat input (Qn) for domestic hot water | kW | 16,5 | 24,7 | 34 |
Rated heat input (Qn) for heating | kW | 12,4 | 20,6 | 28,9 |
Rated heat output (Pn) for domestic hot water | kW | 16 | 24 | 33 |
Rated heat output (Pn) 80/60 °C for heating | kW | |||
Rated heat output (Pn) 50/30 °C for heating | kW | 13,1 | 21,8 | 30,6 |
Heating circuit | ||||
Temperature range for heating circuit | °C | 25/80 | 25/80 | 25/80 |
Water capacity of expansion vessel | l | 7,5 | 7,5 | 7,5 |
Domestic water circuit | ||||
Temperature range for domestic water circuit | °C | 35/60 | 35/60 | 35/60 |
Domestic water production with ΔT = 25 °C | l/min | 9,2 | 13,8 | 18,9 |
Domestic water production with ΔT = 35 °C | l/min | 6,6 | 9,8 | 13,5 |
Combustion | ||||
Diameter of separate discharge pipes | mm | 80/80 | 80/80 | 80/80 |
Diameter of coaxial discharge pipes | mm | 60/100 | 60/100 | 60/100 |
Nitrogen oxide emissions NOx | mg/kWh | 22 | 15 | 15 |
Flue gas mass flow rate (max) | kg/sec | 0,008 | 0,012 | 0,016 |
Flue gas mass flow rate (min) | kg/sec | 0,001 | 0,002 | 0,002 |
Electrical characteristics | ||||
Power supply voltage | V | 230 | 230 | 230 |
Power supply frequency | Hz | 50 | 50 | 50 |
Rated electric power | W | 76 | 88 | 108 |
Dimensions | ||||
Humidity protection rating (EN 60529) | IP | X5D | X5D | X5D |
Net weight | kg | 62 | 62 | 62 |
Dimensions (height/width/depth) | mm | 950/600/466 | 950/600/466 | 950/600/466 |
Benefits
![](https://international.baxi.it/themes/baxi//assets/images/product/durability.jpg)
reliability
Consistent performance over time in all conditions and long-lasting components
![](https://international.baxi.it/themes/baxi//assets/images/product/efficiency.jpg)
efficiency
Our products are designed for an effective use of energy and to achieve optimal performance
![](https://international.baxi.it/themes/baxi//assets/images/product/italian.jpg)
italian design
A combination of elegance, tradition and innovation
![](https://international.baxi.it/themes/baxi//assets/images/product/connectivity.jpg)
complete offer
We offer affordable, complete and tailor-made solutions for every customer
![](https://international.baxi.it/themes/baxi//assets/images/product/comfort.jpg)
comfort
We care about your comfort: feel good at your home!
![](https://international.baxi.it/themes/baxi//assets/images/product/a_class.jpg)
sustainability
Baxi is committed in reducing waste, energy-efficiency and eco-friendly production
![](https://international.baxi.it/themes/baxi//assets/images/product/durability_mobile.jpg)
durability
Simply strong and long lasting without
getting damaged.
![](https://international.baxi.it/themes/baxi//assets/images/product/efficiency_mobile.jpg)
efficiency
Simply strong and long lasting without
getting damaged.
![](https://international.baxi.it/themes/baxi//assets/images/product/italian_mobile.jpg)
italian design
It is not necessarily linked to luxury,
but it is fueled with taste.
![](https://international.baxi.it/themes/baxi//assets/images/product/connectivity_mobile.jpg)
connectivity
The Internet of Things let objects “talk”
to each other.
![](https://international.baxi.it/themes/baxi//assets/images/product/comfort_mobile.jpg)
comfort
Feeling good in your own space.
![](https://international.baxi.it/themes/baxi//assets/images/product/a_class_mobile.jpg)
a+ class / h2 ready
Sustainability and hydrogen are the
key factors to our future.