Ariston Thermo - Renewables

COMFORT. ALWAYS ON
RENEWABLES
HOT WATER | HEATING | RENEWABLES
ariston.com

CONTENTS
/ GENERAL
03 _ ARISTON'S COMMITMENT
04 _ THE FUTURE OF SUSTAINABLE COMFORT
06 _ THE 10 POINT PLAN AND RENEWABLE ENERGY
08 _ HEAT PUMP TECHNOLOGY -
THE FUTURE OF HOME COMFORT
10 _ REFRIGERANT CYCLES
1 1 _ THE IMPORTANCE OF REFRIGERANT GASES
/ RENEWABLE PRODUCTS
12 _ INTRODUCTION TO NUOS PLUS WI-FI
14 _ NUOS PLUS WI-FI
16 _ NUOS PLUS WI-FI ACCESSORIES
18 _ NUOS PLUS WI-FI WORKING MODES & CONNECTIVITY
20 _ NIMBUS
22 _ CUSTOMER CARE & QUALITY
ARISTON'S COMMITMENT TO CUSTOMERS
COMFORT IS AT THE HEART
OF ALL WE DO
With over 90 years of global manufacturing experience, Ariston Thermo Group
is well aware of the challenges in creating heating, water heating and renewable
products that deliver exceptional levels of efficiency and comfort.
Industry professionals and consumers can rest assured that Ariston is an
established international business, constantly striving to develop and expand
its product portfolio. The Ariston team is committed to providing comfort to
everyone, whatever the application.
By investing in the latest technologies, Ariston is able to offer a range of innovative
products that meet all the necessary requirements in terms of energy efficiency,
reliability and quality.
WHATEVER THE NEED OR LOCATION, THE ARISTON CHALLENGE IS TO
DELIVER COMFORT TO EVERYONE.
Ariston is committed to developing new products and technologies to deliver
comfort to all four corners of the world. This is typified by the results of the Ariston
Comfort Challenge, which saw the company successfully travel to Greenland and
bring highly efficient heating to one of the most inhospitable places on Earth –
while maintaining a strong focus on the environment.

RENEWABLES
THE FUTURE OF
SUSTAINABLE COMFORT
WHY RENEWABLES?
Renewable energy is generated from natural resources such as the sun, wind, water
and hydrogen, using technology which ensures that the energy stores are naturally
replenished. Therefore, renewable energy will never run out, does not produce
carbon dioxide and is available to everyone regardless of their location.
WHY HEAT PUMPS?
Utilising renewable technologies (such as heat pumps) as part of a domestic heating
or hot water system will help end users reduce their carbon footprint, as less carbon
dioxide and other greenhouse gases are produced.
Renewables can also play a significant role in the reduction of energy bills. With
their cost-effective and environmentally-friendly operation, they represent the perfect
upgrade for a more sustainable home.
4
WHY ARISTON HEAT PUMPS?
As the world’s leading manufacturer of domestic comfort solutions, Ariston continues
to show its commitment to helping homeowners reduce their carbon footprint through
continuously researching and developing innovative and eco-friendly products.
Ariston’s commitment to innovation is evident in the Nuos Plus Wi-Fi and Nimbus
Plus heat pump ranges. These smart home connected products offer the perfect
alternative to hot water and heating needs, even for homes off the gas grid.

RENEWABLES PAVING THE
ROAD TO NET ZERO
The UK government has a Ten Point Plan to protect future
generations from climate change by laying the foundations for a
Green Industrial Revolution to achieve net zero emissions by 2050.
Sustainability is at the heart of everything we do at Ariston, and we
fully support and participate in the drive towards renewable energy.
GREENER BUILDINGS
Making buildings more energy efficient and moving
away from traditional heating technology is a key
strategy of the Ten Point Plan. The aim is to make
people’s homes warm and comfortable, whilst
keeping bills low. Part of this plan includes an aim
to have 600,000 heat pumps installed every year
by 2028, with incentives to feed the growth of
renewable energy.
As Ariston is a global leader in renewable energy, it is
incredibly well-placed to offer the latest in heat pump
technology for homes both on and off the gas grid.
In addition, Ariston is committed to driving up the
energy efficiencies of our existing heating technology,
ensuring all of our customers benefit from the highest
level of comfort while protecting the environment.
7
1
Advancing
offshore wind
power
3
Delivering new
and advanced
nuclear power
6 8
9
2
4
DRIVING THE GROWTH OF
LOW CARBON HYDROGEN
Hydrogen is the lightest, simplest and most
abundant chemical element in the universe.
It could provide a clean source of fuel and
heat for homes, replacing natural gas boilers.
Ariston is committed to developing its
boiler range for it to become hydrogen
ready. However, there is no single solution
and instead homes will require a mix of
technologies to successfully manage the
energy transition, with alternative
heating solutions playing a pivotal role.
5
Accelerating the
shift to zero
emission vehicles
10
£
Jet zero
& green
ships
Investing
in carbon
capture,
usage and
storage
GREEN INCENTIVES
Schemes such as the Renewable Heat Incentive (RHI) are
available in the UK to financially incentivise homeowners
who choose to heat their homes using renewable
technology. A common requirement of such schemes
is to have any heat pump technology installed by a
Microgeneration Certification Scheme (MCS) approved
engineer, which guarantees the quality of the installation
and provides eligibility for funding.
Protecting
our natural
environment
Green public
transport, cycling
and walking
Green
finance &
innovation
As incentives are regularly updated, Ariston works closely
with government bodies to ensure our comfort solutions
are always compatible with the latest requirements.
6 7

HEAT PUMP TECHNOLOGY -
THE FUTURE OF HOME
COMFORT
REFRIGERANT GAS
WATER
AIR
Refrigerant cycle
and water cycle in
the nuos unit
HEAT PUMPS
WHAT ARE THEY?
Heat pumps use the same technology as the everyday fridge-freezer, only reversed!
This technology plays a considerable role in reaching our collective goal of reducing demand
for fossil fuels and cutting greenhouse gas emissions. Heat pumps operate on a refrigerant
cycle which enables the collection of heat to be efficiently transfered into a heating or hot
water system.
HEAT PUMPS
AIR SOURCE VS. GROUND SOURCE
WHAT DOES
IT MEAN
SPLIT
The refrigeration circulates
between the external unit and
the internal unit
MONOBLOC
The refrigeration circuit
remains isolated in one unit and
water circulates
The most common types of heat pumps are air-source, as opposed to ground-source.
In air-source heat pumps, heat is extracted from the outside air and is used to provide heat
for radiators or a domestic hot water tank. Air source heat pumps are easy to install, more
space efficient compared to their ground source counterparts. All Ariston heat pumps are airsource
systems and can efficiently extract heat from air as cold as -10ºC.
TECHNOLOGY
BENEFIT
No danger of water freezing
outside the property as it never
goes outdoors
No danger of refrigerant leaks
inside the property and no F-Gas
qualifications required
HEAT PUMPS
MONOBLOC & SPLIT
The way refrigerant cycles through a heat pump determines whether it is a monobloc or
split system. But what do these terms mean? The heat pump is a monobloc system if the
refrigerant is self-contained within the unit. A split system means the refrigerant is piped out
of the unit and into a home to complete the cycle. Both monobloc and split systems have
their benefits, but their selection depends on the application.
INSTALLATION
Less evident pressure drops
More flexibility in siting of
appliances
Models available with 2 standard
integrated zones
Compact and more simple
installation
8 9

HEAT PUMP
TECHNOLOGY
THE IMPORTANCE OF
REFRIGERANT GASES
Heat pump technology is powered by refrigerant — a compound typically
found in a fluid or gaseous state. A refrigerant works by absorbing heat from
the environment, and within the refrigerant circuit it uses components such
as condensers, compressors, and evaporators to produce heat.
Refrigerant types are classed based on their efficiency and environmental
impact. Ariston’s Nimbus heating heat pumps (see page 20) will use the
highly efficient R32 refrigerant with a global warming potential that is a third
lower than other commonly used refrigerants like R134A and R22. R32 also
has an ozone depletion potential of zero, which makes it one of the greenest
refrigerant gases available to date.
R32
Refrigerant
70 %
Lower GWP
(Global Warming Potential)
Zero
ozone
Depletion
potential
Easy to
recycle
Ariston is committed to using the most effective refrigerants for its renewable products, while
balancing overall performance and practicality. For this reason, our Nuos Plus Wi-Fi utilises
R134A refrigerant, while our new Nimbus heat pumps will utilise the next-generation R32.
WORKING PRINCIPLES
1
COMPRESSOR
2
1 / The refrigerant fluid crosses the
evaporator and absorbs the heat
from the air drawn in by the fan.
This process ensures the refrigerant
changes state from a liquid to a gas
through evaporation.
2 / The compressor pressurises the
refrigerant gas, which causes it to
increase in temperature.
From air or ground
4
EVAPORATOR
CONDENSER
3
To domestic heating
and hot water system
3 / From the condenser, the
refrigerant gas transfers its heat
to the water, which circulates into
the home. This exchange process
causes the refrigerant to cool down
as it transfers the heat and forces it
to return to a partial liquid state.
EXPANSION VALVE
4 / The refrigerant fluid loses further
pressure and temperature by passing
through the expansion valve, causing
it to completely return to its original
state.
10
11

NUOS PLUS WI-FI
THE FUTURE OF SMART, SUSTAINABLE
COMFORT IS HERE
HEAT PUMP TECHNOLOGY
UNPARALLELED
ENERGY EFFICIENCY
The renewable heat pump technology used by Nuos Plus Wi-Fi converts air into energy
for domestic hot water, ensuring energy savings of up to 80% compared to traditional
direct cylinders of the same capacity. Nuos offers built-in Wi-Fi compatibility for optional
added smartphone control via Ariston connectivity apps and even better efficiency.
Using solely heat pump technology, the Nuos Plus Wi-Fi can reach a temperature
of 62ºC with an efficient COP of 3.14*, and it boasts the fastest heat up times in its
category of under 4 hours**. All models are rated A+ for energy efficiency and can be
fully integrated with Ariston boilers through Sensys control using BusBridgeNet.
COMFORT
TAILORED TO YOU
Nuos Plus Wi-Fi has a variety of working modes and advanced programmes to give you total
control of your tailor-made comfort. Hot water availability is completely customisable with daily
and weekly programming, allowing for the creation of precise hot water schedules throughout
the week. For any unexpected hot water needs, the boost function can be toggled on with a tap
to activate the back-up heating elements.
COMPARING TECHNOLOGIES
3 h 54 min
The lowest heating
time on the market***
+80% 3.14
Energy saving compared
to a conventional direct
cylinder
COP****
Wi-Fi compatibility for
remote smartphone control
via app (optional)
12
NUOS PLUS WI-FI
200D / 250l
* Nuos Plus Wi-Fi 250l only
** Nuos Plus Wi-Fi 200D only
*** Data refers tol Nuos Plus Wi-Fi 200D
**** Data refers to Nuos Plus Wi-Fi 250I with 14°C air T (EN16147)
13

NUOS PLUS WI-FI
Heat Pump Water Heater
ARISTON
NET
AQUA
ARISTON NET
ITALIAN
DESIGN
ENERGY-
EFFICIENT
BUS BRIDGE
NET
ANTI-
CORROSION
ANTI-
LEGIONELLA
i-MEMORY
ANTI-
FREEZING
TECHNICAL DATA 200D 250I
200L Direct/250L Indirect
/ Under 4 hour heat up time, lowest on the market*
/ Highly Efficient COP of 3.14**
/ Optional Wi-Fi control via Aqua Ariston Net app
/ "Plug & Play" no F-Gas qualifications needed to install
/ Extended operating temperature range (-10° to 42°C)
/ R134a eco-friendly refrigerant gas for water
temperatures up to 62°C in heat pump mode
/ Brand new working modes including daily/weekly
programming and I-Memory
/ Full system integration with Ariston boilers
through Sensys controls thanks to BusBridgeNet
technology**
/ 80% more energy savings than traditional cylinders
of the same capacity
/ Super silent at 51dB in Silent Mode, equivalent to a
domestic fridge-freezer
/ Active anode (ProTech) & magnesium anode
/ Titanium enamelled steel tank
*Nuos Plus Wi-Fi 200D only
**Nuos Plus Wi-Fi 250I only
ENERGY RATING
A+
L or XL
*Values obtained with outdoor air temperature of 7°C and relative humidity of
87%, inlet water temperature of 10°C and temperature set at 55°C (as per the
provisions in EN 16147 and CDC 103-15/C-2018). Ducted product Ø200 mm.
**Values obtained from the average of the results as per the provisions in EN
12102-2. Ducted product Ø200 mm.
***Value that guarantees the correct operation and easy maintenance with
non-ducted products. The correct operation of the product is nevertheless
guaranteed up to a minimum height of 2,090m.
****Values obtained with outdoor air temperature of 7°C and relative humidity
of 87%, inlet water temperature of 10°C and temperature set at 55°C (as per
the provisions of 2014/C 207/03 - transitional methods of measurement and
calculation). Ducted product Ø200 mm.
COP* 3,10 3,14
Heating time* h:min 03:59 05:24
Min/max air temperature °C -10/42 -10/42
Max water temperature heat pump only mode/with HE °C 62/75 62/75
Min temperature of storage tank room °C 1 1
Nominal storage tank capacity l 200 245
Sound power level** dB(A) 55 55
Sound power level (silent mode) dB(A) 51 51
Max operating pressure bar 6 6
Voltage/max power consumption V/W 220-240/2500 220-240/2500
Heating element power W 1500+1000 1500+1000
Max electrical power consumption in heat pump mode W 900 900
Electrical system protection grade IPX4 IPX4
Standard air flow rate (automatic modulating control) m 3 /h 650 650
Min volume of the installation room*** m 3 30 30
Empty weight kg 90 115
Insulation thickness mm 50 50
Heat exchanger surface area m 2 - 0,65
Heat dispersion (Pes)* W 21 23
Available static pressure Pa 230 230
Annual electricity consumption (average clima)**** kWh/year 790 1.299
Seasonal efficiency (ηwh)**** % 130 129
Mixed water at 40°C (V40)**** l 256 333
F-GAS DATA
Refrigerant type R-134a R-134a
Refrigerant charge kg 1.3 1.3
GWP 1430 1430
CO2 equivalents t 1,86 1,86
NUOS PLUS WI-FI 200D 250I
Energy class A+ A+
Tapping profile L XL
CODE (including unvented kit) 3820027 3820028
OUT IN OUT IN
C
H
F
B
G
A
376 550 (200L) - 810 (250L)
1737 (200L) - 1997 (250L)
1074 113
980
371 290
F
B
G
A
D
E
1220 (200L) - 1480 (250L)
371
A Inlet cold water ¾” pipe
B Outlet hot water ¾” pipe
C Condensate drainage connection
D Auxiliary circuit ¾” inlet pipe (250I)
E Auxiliary circuit ¾” outlet pipe (250I)
F Sheath for upper probe (S3) (250I)
G Recirculation ¾” pipe (250I)
H Sheath for bottom probe (S2) (250I)
I Display
J Touch buttons
204
650
680
MODE
I
SET
J
MENU
600
14
15

NUOS PLUS WI-FI ACCESSORIES
Ducting ø 125 mm Code NUOS PLUS WI-FI
Flexible grates with ø 186 mm springs, hole from ø 100 to 160 mm, 15 mm thickness 3208050 •
Ducting ø 150 mm Code NUOS PLUS WI-FI
AIR KIT WITH RIGID PIPE Ø 150 (2,5M)
The kit consists of flexible grate with springs, two rigid pipes (1 and 1,5 m) and
aconnector.
AIR KIT WITH RIGID PIPE Ø 150 (2,5M)
The kit consists of flexible grate with springs, two rigid pipes (1 and 1,5 m),
a connector and an elbow.
3208061 •
3208062 •
Pipe ø 150 1 m 3208063 •
Pipe ø 150 1,5 m 3208064 •
Pipe ø 150 0,1m 3208065 •
Ducting ø 200 mm Code NUOS PLUS WI-FI
45° elbow ø 200 3208076 •
2 wall brackets for pipe ø 200 3208077 •
Flexible grate with springs ø 165-200 3208078 •
Silencer ø 200 3208085 •
Installation accessories Code NUOS PLUS WI-FI
Safety hydraulic group ¾” 877085 •
Siphon 1” 877086 •
Connection ø 150 3208066 •
90° elbow ø 150 3208067 •
2 wall brackets for pipe ø 150 3208068 •
Flexible pipe ø 150 1 m 3208069 •
Insulated Ducting ø 160 mm Code NUOS PLUS WI-FI
INSULATED Ducting KIT
Insulated Ducting kit Ø 160mm.
Expanded polyethylene insulation. Consisting of:
- 4 insulated pipes Ø 160mm 1m
- 2 insulated wall pipes Ø 160mm 0.5m
- 2 90° insulated elbow bends Ø 160mm
- 4 joints Ø 160mm
- 2 grids for insulated pipes Ø 160mm
3078088 •
Insulated pipe 1m Ø 160mm 3078090 •
Insulated pipe 0,5m Ø 160mm 3078091 •
Insulated pipe 0,5m Ø 160mm 3078089 •
Insulated joint Ø 160 3078093 •
Insulated 90 ° elbow bend Ø 160 3078092 •
Grid for insulated pipes Ø 160 3078094 •
Ducting ø 200 mm Code NUOS PLUS WI-FI
AIR KIT WITH RIGID PIPE Ø 200
The kit consists of flexible grate with springs, two
rigid pipes (1 and 2 m) and a connector.
3208071 •
Pipe ø 200 1m 3208072 •
Pipe ø 200 2m 3208073 •
Connection ø 200 3208074 •
90° elbow ø 200 3208075 •
16 17

NUOS PLUS WI-FI
MODES & CONNECTIVITY
GREEN MODE
I-MEMORY
21:00
7:00
Green mode is active on the Nuos Plus Wi-Fi by
default. This operating mode ensures that the
only heating source is the heat pump itself. Nuos
Plus Wi-Fi can achieve a maximum hot water
temperature of 62ºC in Green mode, and this is
the most energy efficient mode on the unit.
I-Memory is a brand new mode which learns the
user's water usage habits and automatically creates
a pre-heating schedule. On week one, the unit is in
a constant learning process, and during the second
week, Nuos Plus Wi-Fi implements its findings to
activate a completely tailored, intelligent heating
schedule.
17:00
COMFORT MODE
The Comfort mode can be activated to achieve
faster reheat times. If a large amount of water
is drawn from the unit while it is preheating, the
heating element will kick in and replace or assist
the heat pump to replenish the water as quickly
as possible, maintaining maximum comfort levels
at all times.
PROGRAMMING
The Programming mode on Nuos Plus Wi-Fi allows the user to create their own daily and weekly
pre-heating schedule to maximise comfort. This, like all other modes can be set directly from the
front panel on the unit or through the Aqua Ariston Net app.
BOOST MODE
AQUA ARISTON NET
ARISTON NET
In Boost mode, the Nuos Plus Wi-Fi will heat up as
quickly as possible using the combined heat pump
and heating element until the desired temperature
is reached. This is a temporary function and, once
pre-heating is achieved, the unit will return to its
previously set mode.
Nuos Plus Wi-Fi is fully compatible with the Aqua Ariston Net app. Connecting the Nuos to
Ariston’s dedicated smartphone app is completely optional, but provides the ultimate control of
your hot water system from the palm of your hand. Anything from simply raising the temperature
to setting a weekly hot water schedule can be easily completed through the app, as well as indepth
energy consumption reports to maximise the savings. The Nuos Plus Wi-Fi 250i model
can also be connected to the Ariston Net app when used in conjunction with an Ariston system
boiler and Sensys HD Net Control.
18
19

NIMBUS
NET
COMING
SOON
AIR SOURCE
HEATING
HEAT PUMPS
Nimbus NET is the Ariston range of heat pumps for
space heating and domestic hot water. With high energy
performances up to A+++, Nimbus Net heat pumps use
100% renewable energy sources. The range comprises
split and monobloc models, which are easily managed
via Ariston Sensys control or Ariston connectivity apps
for guaranteed comfort in every season.
20 21

STRIVING FOR EXCELLENCE
Our goal is to ensure our customers’ satisfaction, understanding their needs and continually exceeding
their expectations. Our focus on quality does not stop at the design and manufacturing of our products,
it extends equally to the development of internal talent, the training of professionals and the relentless
improvement of our business processes.
Ariston implements the World Class Manufacturing (WCM) method in its plants to constantly improve
manufacturing performance as well as ensuring product quality and maximum flexibility in meeting
customers’ demands.
“I recently had an Ariston boiler installed but the engineer from an
independent installer wrongly connected it. Ariston very quickly sent
an engineer and corrected the error. Great response.”
“We’ve had an Ariston boiler for a while now and it has been faultless!
The Wi-Fi control is fantastic and so simple to use. We’d give it more
than 5 stars if we could!!”
ARISTON SERVICES
CUSTOMER CARE & QUALITY
Our world-class manufacturing capacity, together with our specialist
Ariston service team, offers our customers an optimal combination
of comfort, energy efficiency and respect for the environment.
MARKET-LEADING WARRANTIES
Ariston is committed to quality and reliability by offering up to 12-year warranties on a selection of
our products. Customers are able to register their warranties either online (www.aristonconnections.co.uk)
or by phone.
We firmly believe in the quality and
longevity of our products. Our warranties
reflect our belief in their reliability and
efficiency. Customers purchasing one of our
products can be reassured that not only are
they highly efficient, but also built to last.
RESEARCH & DEVELOPMENT
The Ariston Thermo Group features 24 centres of competence for product research and development
in 15 countries.
We have placed sustainability and energy efficiency at the core of our operations where it leads
the way for our "Road to 2022" initiative. By 2022, Ariston aims to avoid over 3 million tons of CO 2
equivalent thanks to our most evolved technologies and generate 80% of revenue from highly efficient
or renewable products. Our ability to combine energy efficiency, innovation and design will continue to
shape the future of thermic comfort.
24/7 CUSTOMER SERVICE
Our specialist support and service provides a team of highly skilled experts on hand to offer advice and
assistance, wherever you are, whenever you need it. Specialists in our product areas, there will always be
a point of contact available to deal with anything from arranging a service, warranty issues or scheduling
a visit from an engineer.
The Ariston Technical Service Department is a team of highly skilled and motivated engineers who offer
not only customer care to trained professionals but also technical advice.
With the knowledge an Ariston expert can answer your call within 20 seconds, you can rest assured
that you can count on us 24 hours a day, 7 days a week.
CUSTOMER SERVICE
T: 0333 240 8777
E: customer.service.uk@aristonthermo.com
22 23

Ariston Thermo Group disclaims all responsibility for possible printing or transcription mistakes of this brochure.
Furthermore, it reserves the right to change, without notice, the information of the products contained herein.
HOT WATER | HEATING | RENEWABLES
Customer Service: customer.service.uk@aristonthermo.com | 0333 240 8777
Sales: salesoffice@aristonthermo.com | 0333 240 6666
ariston.com
RENEWABLES BROCHURE/OCTOBER 2021/002