uPVC windows – efficient, adaptable, easy to maintain and budget friendly! However, we can tell that choosing windows made from this material is not simply a matter of selecting the lowest Uw (a measure of heat loss through the entire window – the lower, the better) or the most affordable option. Acoustic performance, security and appearance of the windows should all influence the final decision.
We have prepared following article specifically to give you a better knowledge about the best uPVC window systems.Together, we will examine six uPVC window systems currently available from Fenbro: IDEAL 7000, BluEvolution 82, Energeto Neo, greenEvolution Flex 3D, IDEAL NEO View and Synego. We hope this comparison will help you make a confident and informed decision. Remember, you do not have to make this choice alone – our Specialists are always here to answer your questions and guide you towards the right solution for your project. Let’s jump into it!
Which uPVC window systems did we include in this comparison?
For this comparison, we picked six uPVC window systems representing different performance levels, designs and project applications:
- IDEAL 7000 from Aluplast,
- BluEvolution 82 from Salamander,
- Energeto Neo from Aluplast,
- greenEvolution Flex 3D from Salamander,
- IDEAL NEO View from Aluplast,
- Synego from Rehau.
Ever heard of any of these brands? Fenbro offers products from all of them, and they are popular choices among our customers. Right now, we’ll analyse each system, focusing on its specifications, advantages, limitations and the types of projects it is best suited to.
uPVC window profile comparison
As previously mentioned, it’s now the right moment to explore all these uPVC window systems in more detail. Below, you will learn about their differences and advantages, and what types of projects they are most appropriate for.
Aluplast IDEAL 7000 – a practical and versatile solution
First on the list – IDEAL 7000 by Aluplast! This system uses a six-chamber construction with an installation depth of 85 mm – the deepest frame in this comparison. It accommodates glazing units up to 52 mm and can be upgraded from double to triple glazing with warm edge spacers. Its Powerdur inside technology replaces conventional steel reinforcement in the frame with thermoplastic inserts reinforced with Ultradur High Speed material, helping improve the thermal performance of the profiles.
The system offers U-value between 0.8 and 1.1 W/m²K, depending on the selected configuration. It also has two gaskets, Class 3 air permeability, 5A water resistance and C3 wind resistance. These specifications make it an excellent option for standard residential projects, although systems with a central third gasket may provide a higher level of sealing.
Its declared acoustic insulation of 29–38 dB is sufficient for many residential locations, but customers dealing with significant external noise may want to consider one of the systems offering higher published sound reduction. Visually, IDEAL 7000 has more traditional proportions than the flush or concealed-sash alternatives in this comparison.
Best suited to: standard renovations and energy-efficient residential projects requiring a functional, versatile system.
Consider another system if: maximum acoustic insulation, a central gasket or minimalist concealed-sash design is a priority.
Salamander BluEvolution 82 – balanced performance with robust reinforcement
Now, let’s move on to BluEvolution 82 by Salamander – a profile you can find in many of our projects and one that has become our bestseller.
BluEvolution 82 combines a six-chamber profile, an 82 mm installation depth and three gaskets. Its minimum Uw of 0.77 W/m²K places it among the stronger thermal performers in the comparison, whilst glazing units up to 53 mm provide flexibility when selecting double or triple glazing.
Robust steel reinforcement and additional ribbing within the profile chambers increase the rigidity of the construction. This makes BluEvolution 82 suitable for larger window structures, subject to the dimensions and structural requirements of the individual project. The system also includes six anti-burglary locking points as standard. Its fittings operate within a dry chamber created by the gasket arrangement, helping protect the mechanisms from external conditions and potentially extending their service life.
With Class 3 air permeability, 7A water resistance and C4 wind resistance, BluEvolution 82 provides a balanced technical package. Its acoustic range of 29–38 dB is more modest than the highest figures available from IDEAL NEO View, Synego and greenEvolution Flex 3D, so the glazing specification should be considered carefully in noise-sensitive locations.
Best suited to: customers looking for a balanced combination of thermal efficiency, structural stability, security features and everyday practicality.
Consider another system if: the project requires the highest declared acoustic insulation or a strongly minimalist, flush appearance.
Aluplast Energeto Neo – the one with strongest thermal performance
Energeto Neo by Aluplast records the lowest published Uw in this comparison, reaching 0.70 W/m²K in its best configuration. It also accommodates glazing units from 36 to 68 mm, giving it the greatest glazing capacity among the six systems. These characteristics make it a particularly strong candidate for energy-efficient projects where reducing heat loss is a primary concern.
The system uses several technologies designed to improve thermal and structural performance. Powerdur inside replaces traditional steel reinforcement in the uPVC sections with glass-fibre-reinforced thermoplastic inserts, while bonding inside connects the glazing unit to the sash to increase stability. Optional foam inside technology can further improve the thermal performance of the frame and sash by filling selected internal chambers with insulating material.
Energeto Neo is available in a classic non-flush version and a modern flush version inspired by the appearance of aluminium systems. This gives customers more design freedom than is available with many conventional uPVC profiles. The system also provides Class 4 air permeability, 7A water resistance and burglary resistance of up to RC2.
It is important to remember that the headline Uw applies to the best configuration and that some technologies, including foam filling, may be optional. Its expected acoustic insulation of 29–38 dB is also lower than the maximum figures declared for several other systems in the comparison.
Best suited to: energy-conscious homeowners, modern new builds and projects requiring advanced glazing options or a choice between flush and non-flush aesthetics.
Consider another system if: maximum declared acoustic insulation or RC3 burglary resistance is more important than achieving the lowest minimum Uw.
Salamander greenEvolution Flex 3D – great acoustic insulation with a classic appearance
Another one of our bestsellers. GreenEvolution Flex 3D by Salamander has a six-chamber profile, a 76 mm installation depth and three gaskets, including a central MD gasket. This arrangement improves the sealing of the window and supports a U-value from 0.79 W/m²K. The system has been developed with energy-efficient and passive construction requirements in mind.
One of its strongest features is acoustic performance, with sound reduction of up to 47 dB. It also provides burglary resistance of up to RC3, giving it a stronger published security classification than for example Energeto Neo. Maximum stated sash dimensions reach 2,600 mm in height and 1,500 mm in width, although the final permitted size will always depend on the complete configuration and structural calculations.
The profile has a classic appearance and is available with a wide selection of veneers, making it easier to adapt to both traditional and contemporary façades. Its maximum glazing thickness of 48 mm is the lowest in this comparison, but this does not automatically mean weaker overall performance, as the complete glazing specification matters more than thickness alone. Additionally, greenEvolution Flex 3D is rated Class 4 for air permeability, 9A for water resistance and C4 for wind resistance.
Best suited to: energy-efficient projects, properties exposed to external noise and customers seeking RC3 security with classic uPVC proportions.
Consider another system if: the project requires the thickest possible glazing unit, concealed-sash aesthetics or fully published air, water and wind resistance classes at the initial comparison stage.
Aluplast IDEAL NEO View – the most design-focused system
Fifth on our list is another product from Aluplast: IDEAL NEO View. It has been developed for customers who want the practical benefits of uPVC with the minimalist appearance typically associated with modern aluminium windows. Its slim sash is fully concealed behind the frame when viewed from outside, while a visible frame width of only 102 mm helps maximise the glazing area. This allows more natural light to enter the building and creates a cleaner façade appearance. Has this caught your interest? Learn more in our guide to slim-look windows.
The system combines its design advantages with strong technical performance. It is characterised by a Uw value starting at 0.70 W/m²K., accommodates glazing units up to 60 mm and provides acoustic insulation of up to 50 dB – the highest declared value in this comparison. Class 4 air permeability, 9A water resistance and C3 wind resistance further strengthen its specification.
An additional central seal protects against moisture, noise and heat loss while creating a dry chamber for the window mechanisms. The glazing unit can also be permanently bonded to the sash to improve rigidity and reduce the risk of warping, settling or deformation.
However, IDEAL NEO View is less flexible in terms of available configurations. It is offered exclusively with triple glazing and is limited to classic tilt-and-turn windows or double-leaf windows with a mullion-free central meeting stile. Transoms cannot be used and fixed lights are not available in this model. These limitations need to be checked carefully before selecting it for a project.
Best suited to: design-led new builds, modern façades and projects where natural light, slim external lines and high acoustic performance are priorities.
Consider another system if: the project requires fixed windows, transoms, a wider range of opening configurations or double glazing.
Synego Rehau – a high-specification all-rounder
Last but not least, we have Synego from Rehau. This profile combines an 80 mm installation depth with a seven-chamber frame, six-chamber sash and three-gasket central sealing system. Its published Uw of 0.76 W/m²K and acoustic insulation of 47 dB make it one of the strongest all-round performers in the comparison.
The system also achieves Class 4 air permeability, 9A water resistance and B5 wind resistance. Burglary resistance of up to RC3 is available, while five anti-burglary locking points are fitted as standard. Optional concealed hinges can further improve both appearance and everyday functionality.
Synego Rehau also stands out for its finish. HDF (High-Definition-Finishing) technology creates a particularly smooth and durable profile surface, while V-Perfect welding produces cleaner and more precise-looking corner joints. A broad colour range, including wood-effect and contemporary finishes, helps the system suit both renovations and new-build projects.
Its EcoPuls profiles contain between 40% and 75% recycled PVC. This means that Synego is a strong choice for projects where sustainability matters.
Synego does not offer the same concealed-sash façade effect as IDEAL NEO View or the 68 mm glazing capacity of Energeto Neo. Nevertheless, its combination of thermal performance, acoustics, security, resistance classes, finish quality and recycled content makes it a particularly versatile premium option.
Best suited to: customers seeking balanced performance across thermal insulation, acoustics, security, appearance and sustainability.
Consider another system if: the lowest possible Uw, maximum glazing capacity or a fully concealed external sash is the overriding priority.
Best uPVC window systems comparison: summary table
We know that after reading through all the specifications in the section above, you may feel a little overwhelmed. That’s why we created the table below. Its individual columns show the main differences between the systems. Simply put, a lower Uw means less heat loss, a higher dB value means better protection against outside noise, chambers support insulation, gaskets improve sealing, and maximum glazing thickness shows the thickest glazing unit the system can accommodate.
| System | Brand | Chambers | Frame depth | Estimated U-value | Max. glazing thickness | Gaskets | Acoustic insulation | Price* |
|---|---|---|---|---|---|---|---|---|
| IDEAL 7000 | Aluplast | 6 | 85 mm | 0.8–1.1 W/m²K | 52 mm | 2 | 29–38 dB | €181 |
| BluEvolution 82 | Salamander | 6 | 82 mm | 0.77 W/m²K | 53 mm | 3 | 29–38 dB | €224 |
| Energeto Neo | Aluplast | 6 | 76 mm | 0.70 W/m²K | 68 mm | 3 | 29–38 dB | €266 |
| greenEvolution Flex 3D | Salamander | 6 | 76 mm | 0.79 W/m²K | 48 mm | 3 | Up to 47 dB | €199 |
| IDEAL NEO View | Aluplast | 6 | 76 mm | 0.75 W/m²K | 60 mm | 3 | Up to 50 dB | €277 |
| Synego | Rehau | 7 | 80 mm | 0.76 W/m²K | 51 mm | 3 | Up to 47 dB | €215 |
PLEASE NOTE: all example prices shown in the table apply to a 1000 × 1000 mm white uPVC window with triple glazing.
Next, we have collected additional useful information on security, air permeability, water resistance and wind resistance:
| System | Air permeability | Water resistance | Wind resistance | Security level |
|---|---|---|---|---|
| Aluplast IDEAL 7000 | Class 3 | 5A | C3 | RC2 |
| Salamander BluEvolution 82 | Class 3 | 7A | C4 | RC2, six anti-burglary locking points as standard |
| Aluplast Energeto Neo | Class 4 | 7A | C3/B3 | RC2 |
| Salamander greenEvolution Flex 3D | Class 4 | 9A | C4 | Up to RC3 |
| Aluplast IDEAL NEO View | Class 4 | 9A | C3 | RC2 |
| Rehau Synego | Class 4 | 9A | B5 | Up to RC3 |
Quick picks: which uPVC system should you choose?
Looking for a system that excels in a particular area? See our expert picks below. They are based on published product specifications, the practical experience of Sales Specialists and feedback from our customers. Use them as a starting point, then contact us to explore these and other options – we’ll be happy to talk about your project!
- Best for energy efficiency: Energeto Neo
- Best balance of performance and price: BluEvolution 82
- Best published acoustic performance: IDEAL NEO View
- Best for modern new builds: IDEAL NEO View
- Best for renovation projects: Synego
- Best for improved safety: Synego or greenEvolution Flex 3D
- Best for sustainability: Synego
- Most affordable option: IDEAL 7000
Fenbro’s comparison tool
Did you know that we have a product comparison tool on our website? If you are deciding between two systems, open their product pages, select Add to Compare and review their key specifications side by side. We also invite you to check out this article on how to navigate Fenbro website.
Conclusion – which uPVC windows are the best?
So, basically, the right choice depends on your project’s specific requirements, priorities and budget. After reading this guide, you should have a better understanding of the leading uPVC window systems available from Fenbro. But, let’s remember, you do not have to make this decision alone – our Sales Specialists are always ready to answer your questions and are just a message away. Fill out our contact form and tell us what’s on your mind – we will get back to you with a personalised quote within just two working days.
Frequently Asked Questions (FAQ)
Which uPVC window system has the best U-value?
Energeto Neo has the lowest published Uw in this comparison, reaching 0.70 W/m²K in its best configuration. The final value will depend on the dimensions, glazing and complete window specification.
Which uPVC windows are best?
There is no single answer to this question, as every project has different requirements. The six models featured in this Fenbro article – IDEAL 7000, bluEvolution 82, Energeto Neo, greenEvolution Flex 3D, IDEAL NEO View and Synego – each have their very own strengths. The best choice for you will depend on your property, priorities and budget.
Which uPVC system provides the best acoustic insulation?
IDEAL NEO View offers sound insulation of up to 50 dB. Synego and greenEvolution Flex 3D follow closely, with published values of 47 dB.
Which uPVC window is best for a modern new build?
IDEAL NEO View is particularly suitable for modern architecture because of its concealed sash, slim external appearance and increased glazing area. The flush version of Energeto Neo is another strong design-led option.
Which uPVC system is most suitable for renovation?
Synego is a versatile choice for renovation projects thanks to its strong performance, wide selection of finishes and compatibility with different architectural styles. IDEAL 7000 and greenEvolution Flex 3D may also work well where more classic proportions are preferred.
Does a greater number of window chambers mean better performance?
Not necessarily. The number of chambers is only one element of the window construction. Glazing, gaskets, reinforcement, dimensions and overall system design also affect thermal and acoustic performance.
What is the difference between Uw and Ug?
Uw describes the thermal performance of the complete window, including the glazing, frame and other components. Ug refers only to the glazing unit, so the two values should not be compared directly.
Which uPVC systems offer the highest burglary resistance?
Synego and greenEvolution Flex 3D offer burglary resistance of up to RC3. This level may require a specific combination of glazing, hardware and other security components.
Can IDEAL NEO View be used for every window in a house?
Not always. IDEAL NEO View is available only with triple glazing and in selected tilt-and-turn or double-leaf configurations. Fixed lights and transoms are not available in this model.
Are the prices shown in the Fenbro comparison final?
No, the reference prices apply to a 1000 × 1000 mm white uPVC window with triple glazing and are provided for like-for-like comparison only. The final cost depends on the dimensions, colour, glazing, hardware, security options and other individual project requirements.
Can Fenbro help me choose between these systems?
Yes, of course! Use the comparison tool to create an initial shortlist, then send Fenbro your window schedule or project requirements. Our Team can help you compare the available configurations and prepare an individual quote.
Which is the best uPVC window company?
Fenbro is one of the best choices for customers looking for high-quality uPVC windows, a wide range of leading systems and expert guidance throughout the selection process.
