TL;DR:
TWR Group’s Eurocell uPVC windows deliver exceptional thermal insulation, helping reduce heat loss, energy consumption, and household energy bills. With U-values as low as 0.8 and customisable glazing options, including double and triple glazing, they meet and exceed UK energy regulations — making them a smart investment for homeowners when it comes to sustainability, comfort, and cost-efficiency.
Why energy efficiency in windows is an important consideration for homeowners today
Windows play a critical role in a building’s energy performance. Up to 30% of a home’s heat loss can occur through inefficient windows, increasing energy consumption and energy costs. Investing in energy-efficient uPVC windows is one of the most effective ways for homeowners to lower heat transfer, improve thermal comfort, and reduce their carbon footprint.
As an installer, it means you must be offering your customers the most energy efficient uPVC windows and be able to explain the benefits of them.
At TWR Group, we manufacture and supply high-performance Eurocell uPVC windows that meet and exceed UK building regulations for thermal insulation and energy efficiency. Whether for new builds or replacements, our window systems are designed with installers, specifiers and trade professionals in mind.
The energy performance of TWR’s Eurocell uPVC windows
At TWR Group, we fabricate a versatile range of Eurocell uPVC windows, including Flush Sash, Casement and Tilt and Turn windows. Each style offers:
- U-values as low as 0.8 W/m²K
- Window Energy Ratings up to A+14
- Excellent air-tightness
- Enhanced weather resistance to prevent cold draughts
These features contribute directly to lower energy bills, comfortable indoor temperatures, and long-term energy savings for homeowners.
Understanding U-Values and their impact
A window’s U-Value measures the rate of heat transfer through its components. The lower the U-value, the better the thermal insulation. UK regulations currently require a minimum U-value of 1.4 W/m²K for replacement windows, but our products go far beyond that, down to 0.8 W/m²K.
For an installer, this means your customers will benefit from:
- Less heat loss during colder months
- Reduced reliance on heating systems
- Improved energy efficiency and carbon reduction
What’s better: Double glazing or triple glazing?
One decision homeowner’s will be thinking long and hard about for their new uPVC windows is whether they choose double or triple glazing and, while both significantly improve the energy efficiency of windows, they each have their own advantages.
Double Glazing:
- Two glass panes separated by an inert gas (argon or krypton)
- Reduces heat transfer
- Balances insulation and cost
- Ideal for most UK homes
Triple Glazing:
- Three panes of glass with two insulating gas layers
- Superior thermal insulation and soundproofing
- Ideal for colder climates or those pursuing passive house standards
- Higher initial cost, but greater energy savings over time
Our Eurocell frames are compatible with both double and triple-glazed insulated glass units to suit project requirements.
Customisation options for maximum energy efficiency
At TWR Group, we understand that every project is unique. That’s why our uPVC windows come with customisable features to maximise energy efficiency and performance, including thermal inserts for enhanced frame insulation and Low-E coatings to control solar heat gain. These innovations combine to create excellent insulation, helping prevent cold draughts and improve comfort year-round.
How do energy-efficient uPVC windows reduce energy bills?
Here’s how our windows help homeowners cut energy costs:
- Reduced heat loss in winter means lower heating demand
- Controlled solar gain in summer reduces cooling needs
- Excellent airtightness prevents unwanted air exchange
The result? Significant energy savings and lower energy bills throughout the year.
With U-values as low as 0.8 W/m²K and A+14 window energy ratings, our uPVC window range ensures full compliance and adds value to sustainable developments. Our products to UK energy regulations and Energy Performance Certificate (EPC) requirements.
Maintaining a comfortable indoor temperature
High-performance windows contribute to a consistent, comfortable indoor temperature year-round. Through reduced heat transfer and improved insulation, our uPVC systems limit temperature fluctuations caused by external weather conditions. This stable environment is particularly important for:
- Residential homes
- Multi-storey developments
- Commercial buildings
Why uPVC is a popular choice for energy efficiency
uPVC is widely regarded as one of the most effective materials for energy-efficient windows due to:
- Naturally low thermal conductivity
- Strong moisture resistance
- Requires minimal maintenance
- Long lifespan and excellent value
- Fully recyclable, supporting sustainability goals
As fabricators of Eurocell systems, TWR Group ensures each uPVC frame is manufactured to exacting standards, delivering both performance and durability. For homeowners, specifiers, and installers, energy-efficient uPVC windows are an important consideration in creating sustainable, high-performing buildings.
Choosing the right window style for energy performance
Whether you’re working on a new build or a refurbishment, the size of the window, style, and location all impact its energy efficiency. TWR Group offers:
Flush Sash: Our Logik Flush Sash windows provide a sleek, contemporary finish; perfect for modern homes or upgrades for older homes. They have also been designed for quick and hassle-free installation.
Tilt and Turn: Maximum ventilation and easy cleaning for high-rise buildings thanks to their unique inward-opening sash to maximise airflow. Our tilt and turn windows are easy to fit and provide easy operation for homeowners.
Casement: Perfect for traditional and contemporary homes thanks to being versatile, timeless, and highly energy efficient. Available in a range of sizes, they are also quick to install.
Partner with TWR Group now
If you’re planning a residential or commercial project, TWR Group is your trusted partner for high-performance uPVC window solutions. We fabricate to your specification, deliver on time, and offer full support to help you meet design, compliance, and energy goals.
Get in touch today to discuss your next project and discover how our energy-efficient uPVC windows can deliver long-term value for your customers.
FAQs: Energy efficiency of uPVC windows
Is investing in energy-efficient uPVC windows a smart investment for homeowners?
Absolutely. The long-term benefits far outweigh the initial cost, including lower heating and cooling costs, reduced carbon emissions, greater thermal comfort and an increase in property value
What’s the benefit of triple glazing over double glazing?
Triple glazing offers better insulation and more energy savings, especially in colder climates.
Are TWR Group’s uPVC windows suitable for all property types?
Yes — they’re available in multiple styles and sizes, suitable for residential and commercial projects.