Condensing boilers

Nuvola Duo-tec+

Combi condensing boilers with DHW storage
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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.

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.

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

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

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

It can be connected to BaxiMAGO, the WI-FI smart modulating thermostat, and Baxi service App. You can have your boiler always under control

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

reliability

Consistent performance over time in all conditions and long-lasting components

efficiency

Our products are designed for an effective use of energy and to achieve optimal performance

italian design

A combination of elegance, tradition and innovation

complete offer

We offer affordable, complete and tailor-made solutions for every customer

comfort

We care about your comfort: feel good at your home!

sustainability

Baxi is committed in reducing waste, energy-efficiency and eco-friendly production

durability

Simply strong and long lasting without
getting damaged.

efficiency

Simply strong and long lasting without
getting damaged.

italian design

It is not necessarily linked to luxury,
but it is fueled with taste.

connectivity

The Internet of Things let objects “talk”
to each other.

comfort

Feeling good in your own space.

a+ class / h2 ready

Sustainability and hydrogen are the
key factors to our future.

download area

Data sheet

Instructions manual for users and fitters (it-en-de-cs-sk)

Instructions manual for users and fitters (hu-ro-ru)

Instructions manual for users and fitters (uk)

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