Buying an Ariston solar water heater is a long-term investment in a property’s hot-water system. However, choosing the correct system requires more than comparing tank capacity and price.
Before purchasing, consider your daily hot-water demand, storage capacity, collector size, roof conditions, water pressure, installation requirements, backup heating, water quality and future maintenance.
For homes and commercial properties in the UAE, these factors are particularly important because of high solar exposure, high summer temperatures and varying hot-water demand.
1. Calculate Your Hot-Water Requirement
The first question should be:
How much hot water does the property actually need?
Consider:
- Number of occupants
- Number of bathrooms
- Number of showers per day
- Average shower duration
- Simultaneous shower usage
- Kitchen hot-water consumption
- Morning and evening peak demand
- Other hot-water requirements
Don’t select a solar water heater based only on the number of people.
Two households with four occupants can have significantly different consumption depending on their usage patterns.
2. Choose the Correct Tank Capacity
Ariston offers solar water heating systems in different storage capacities.
For example, Ariston’s current Middle East KAIROS THERMO GR-2 range lists nominal capacities of:
150 litres
200 litres
300 litres
The correct capacity should be based on actual hot-water demand rather than automatically selecting the largest tank.
A smaller household with moderate consumption may require less storage, while a large villa with several bathrooms and higher simultaneous demand may need considerably more.
3. Check the Number and Size of Solar Collectors
Tank capacity isn’t the only measure of solar-water-heater performance.
The solar collector is responsible for capturing solar energy.
For example, Ariston’s Middle East GR-2 specifications currently show:
150L → 1 collector → 2.04 m² gross collector area
200L → 1 collector → 2.04 m² gross collector area
300L → 2 collectors → 4.08 m² gross collector area
This demonstrates why the tank and collector arrangement should be considered as a complete system rather than evaluating tank volume alone.
4. Check Available Roof Space
Before purchasing the solar water heater, inspect the installation location.
Consider:
- Available roof area
- Collector dimensions
- Tank location
- Supporting frame
- Pipe routes
- Maintenance clearance
- Access for technicians
- Other rooftop equipment
The 300-litre GR-2 configuration, for example, uses two collectors, so it naturally requires more collector area than the listed single-collector 150L and 200L configurations.
Don’t purchase the system before confirming that the installation area is suitable.
5. Consider Collector Orientation and Shading
Having sufficient roof space doesn’t automatically mean the location is suitable.
Look for potential shading from:
- Adjacent buildings
- Parapet walls
- Water tanks
- AC equipment
- Trees
- Architectural structures
- Other solar equipment
Solar collectors should receive suitable solar exposure.
Poor positioning can reduce the amount of solar energy available to the system.
6. Check Whether Your Roof Is Suitable
The roof must safely accommodate the solar water heater installation.
Remember that you’re not installing an empty tank permanently—the system will contain water and associated equipment.
The Ariston Middle East GR-2 page lists empty system masses of approximately 104 kg, 114 kg and 178 kg for its respective 150L, 200L and 300L configurations.
Once filled with water, the installed load will be substantially higher.
Roof condition, structural support and mounting therefore need to be evaluated appropriately.
7. Check Your Water Pressure
Water pressure is especially important in UAE villas and buildings using booster pumps.
Before purchasing, determine:
Normal operating pressure: ___ bar
Maximum operating pressure: ___ bar
Booster pump cut-in: ___ bar
Booster pump cut-out: ___ bar
The domestic-water side of the selected solar heater and its connected components must be compatible with the property’s operating pressure.
Don’t assume all Ariston solar systems have identical pressure ratings; verify the technical documentation for the exact model and market configuration you’re purchasing.
8. Consider UAE Summer Conditions
Strong UAE sunshine is beneficial for solar thermal systems, but high solar availability can also result in very high stored-water temperatures.
Therefore, the complete installation should incorporate appropriate safety and temperature-control measures.
Depending on the system design, these can include:
- Safety valves
- Expansion accommodation
- Temperature controls
- Thermostatic mixing
- Correctly rated pipework
- Appropriate insulation
Ariston’s GR-2 Middle East specifications include a solar safety valve, for example.
The installation should follow the requirements for the specific system.
9. Check Whether Backup Heating Is Included
There will be situations where available solar energy doesn’t fully meet hot-water demand.
Examples include:
- Unusually high consumption
- Cloudy conditions
- Extended periods of reduced solar availability
- Heavy evening/morning usage
A supplementary electric heater can provide backup where the selected system supports it.
Before purchasing, confirm:
- Is an electric heating element included?
- What is its kW rating?
- How is it controlled?
- Is a thermostat included?
- What electrical connection is required?
Don’t assume backup heating is included simply because another Ariston model offers it.
10. Consider Water Quality
Water quality affects many hot-water systems over time.
Scale and sediment can influence components exposed to heated water, particularly where water temperatures are high.
Before buying, consider the property’s water conditions and ask about:
- Scale management
- Tank maintenance
- Corrosion protection
- Anode inspection where applicable
- Recommended service intervals
Preventive maintenance is generally preferable to waiting until performance deteriorates.
11. Check Tank Insulation
The solar collector captures energy during daylight, but the tank needs to retain that heat until the water is required.
Therefore, tank insulation is important.
Ariston lists 50 mm insulation thickness for its current Middle East GR-2 150L, 200L and 300L configurations.
Good insulation helps reduce unnecessary heat loss from stored hot water.
12. Consider Hot-Water Circulation
Large villas can have considerable distances between the solar water heater and bathrooms.
Without hot-water circulation, users may need to wait for hot water to travel through the pipework.
A properly designed hot-water circulation pump can improve hot-water availability at distant fixtures.
However, circulation also increases potential heat loss.
If circulation is required, consider:
- Proper pipe insulation
- Circulation pump sizing
- Timer/control arrangement
- Return pipe design
- Operating schedule
These factors should ideally be considered before installing the solar water heater.
13. Check the Installation Materials
A good solar water heater can still perform poorly if installation quality is inadequate.
Ask what is included in the quotation.
Check:
- Hot-water piping
- Cold-water piping
- Solar circuit piping
- Pipe insulation
- Isolation valves
- Safety valves
- Non-return valves
- Fittings
- Supporting structure
- Electrical wiring for backup heating
- Thermostatic mixing valve where required
Compare quotations based on the complete installation scope, not only the equipment price.
14. Check Collector Construction
Collector construction affects solar-energy collection and long-term exposure to outdoor conditions.
Ariston states that its current Middle East GR-2 collector uses a selective absorber surface with 95% absorption, clear tempered glass and copper absorber tubing. The system is also listed as Solar Keymark certified.
When comparing solar water heaters, check the specifications of the actual model being offered rather than relying only on the brand name.
15. Consider Maintenance Accessibility
Solar water heaters shouldn’t be installed where future maintenance becomes unnecessarily difficult.
Technicians may need access to:
- Solar collectors
- Storage tank
- Safety valves
- Water connections
- Insulation
- Electrical backup heater
- Control components
- Supporting frame
Leaving sufficient working space can make future inspection and repair considerably easier.
16. Check Spare Parts and After-Sales Support
Before purchasing, ask about the availability of:
- Heating elements
- Thermostats
- Safety valves
- Tank components
- Collector components
- Fittings
- Installation accessories
Also confirm who will handle:
Installation → Commissioning → Warranty → Maintenance → Repair
A solar water heater should be considered as a long-term system rather than a one-time equipment purchase.
17. Understand the Warranty
Ask for the warranty conditions before placing the order.
Check:
- Tank warranty
- Collector warranty
- Electrical-component warranty
- Installation warranty
- Conditions that may invalidate warranty
- Required maintenance
- Who processes warranty claims
Keep the invoice, model information and warranty documentation after installation.
18. Don’t Compare Only the Purchase Price
Two quotations that both say:
“Ariston 300L Solar Water Heater”
may not necessarily include the same equipment and installation scope.
Compare:
Exact model
Tank capacity
Number of collectors
Collector area
Supporting frame
Safety components
Backup heater
Piping and insulation
Installation
Commissioning
Warranty
After-sales service
The lowest initial quotation may not always represent the lowest long-term cost.
19. Confirm the Exact Ariston Model
This is particularly important.
Don’t purchase based only on:
“Ariston Solar Heater – 200L”
Ask for the exact model number or series.
Different Ariston markets and product families can have different specifications.
For example, Ariston’s Middle East site currently lists the KAIROS THERMO GR-2 as a natural-circulation indirect solar system, available in single- and double-collector configurations.
Use the technical datasheet for the actual model being supplied to verify its specifications.
20. Questions to Ask Before Buying
Before ordering an Ariston solar water heater, ask your supplier:
- What exact Ariston model are you offering?
- What is the nominal tank capacity?
- How many solar collectors are included?
- What is the total collector area?
- Is this size suitable for my hot-water demand?
- Is my roof suitable for installation?
- What operating pressure is permitted?
- Is backup heating included?
- What safety components are supplied?
- Is a mixing valve required?
- What piping and insulation are included?
- What is included in installation?
- What warranty is provided?
- Who provides maintenance?
- Are spare parts readily available?
Getting these answers before purchase makes it much easier to compare different offers properly.
Ariston Solar Water Heater Pre-Purchase Checklist
Before requesting a quotation, prepare:
Number of occupants: ___
Number of bathrooms: ___
Estimated daily hot-water requirement: ___ L
Simultaneous showers: ___
Preferred tank capacity: 150L / 200L / 300L
Available roof area: ___ m²
Water pressure: ___ bar
Booster pump installed: Yes / No
Backup heating required: Yes / No
Hot-water circulation: Yes / No
Property type: Villa / Residential / Commercial
Installation location: ___
Providing this information helps the supplier evaluate the system according to the actual application.
Ariston Solar Water Heater Supplier in UAE
DXB Solutions LLC supplies Ariston solar water heaters in the UAE for villas, residential buildings and commercial applications.
System selection can be considered according to:
- Required hot-water capacity
- Number of users
- Tank size
- Collector configuration
- Roof conditions
- Water pressure
- Backup heating requirements
- Hot-water circulation
- Installation requirements
Before purchasing, provide the property type, number of occupants, bathrooms, approximate hot-water demand and installation details so the system can be evaluated appropriately.
Conclusion
Before buying an Ariston solar water heater, don’t focus only on the tank capacity or purchase price.
Consider the complete system:
Hot-water demand + Tank capacity + Collector size + Roof conditions + Water pressure + Backup heating + Safety + Installation + Maintenance
A properly selected system should match both the property’s hot-water requirements and its installation conditions.
Taking time to check these factors before purchasing can help avoid undersizing, unnecessary oversizing, installation complications and future maintenance problems. For more info contact Ariston Solar Water Heater Suppliers in UAE or call us at +971 4 2522966.