Nuvola Duo-tec+

Condensing boilers
Nuvola Duo-tec+

Condensing boilers

Combi condensing boilers with DHW storage

Residential

Wall Hung

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.

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Characteristics

Models: 16, 24, 33
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

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

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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