Energy-Efficient Windows And Doors Savings: The Complete Guide

Poorly insulated windows and doors leak valuable heat and money. Heat can escape through your existing windows and doors in a number of ways, including draughts, poorly fitted frames and panes that are low standard. It’s not healthy for your pocket or the environment. With the ever-increasing price of energy and longer winters, now is the time to take steps to ‘energy-proof’ your home.

This is our complete guide to the benefits of replacing your old windows and doors and how much you can really save on your energy bills.

How much do Energy-Efficient Windows & Doors Save?

The amount of money you could get off your energy bill right now is mounting up. The energy calculator developed by the Glass & Glazing Federation (GGF) shows the savings you could be seeing from new energy-efficient windows and doors. In fact, upgrading from pre-2002 uPVC double-glazing to A-rated windows from Anglian could save you £184.25 off your annual energy bills.

A typical house upgrading from pre 2002 double glazed PVC-U windows with gas heating to Anglian A rated windows £184.25
Annual Saving
10 Year Saving
*Source Glass and Glazing Federation. † A typical detached house has 23.7m2 of windows. Based on replacing uPVC double glazed windows with a 12-14mm sealed unit and gas central heating with A-Rated thermally efficient windows.

Invest in long-term protection against rising energy bills by installing new windows and doors from Anglian. Keep money in your pocket and take a big step to reduce your carbon footprint now.

Save Energy. Save Money. Act Now

  1. Reduce the cost of heating your home

  2. Cut your carbon emissions

  3. Reduce your carbon footprint

  4. Improve the comfort of your home and add style

  5. Save hundreds of pounds in wasted energy not only this year but every year.

The Invisible Benefits

Thermal imagery shows you could be throwing money out the window, quite literally. The intense red areas show heat escaping through the old windows and door before upgrading to our new thermally efficient ones. It's a simple way of showing the big reduction in red-heat loss and a big improvement in heat retained. Different Anglian windows have different energy ratings and savings, but also enhance the aesthetic of your home. Start transforming your home today and explore our wide range of window styles.

Download the Infrared Test Report here
Thermal camera heat loss through windows

How much will new Windows Save on Energy?

If your windows and doors are double-glazed already, it does not mean they are thermally efficient.

Up until June 2022, the minimum WER rating to meet Building Regulations in England was a C Energy Rating. This is now still only a B-rating. Companies may have only installed your windows and doors to these minimum requirements. Anglian have been installing A-rated windows as standard since 2014. Save more this year and every year that follows by replacing your windows with us today.

How old are your windows? Building Regulation Min. Energy Rating in England Upgrading to Anglian's A Rated Windows - predicted energy savings
20 years and older 2.6Wm2k (Energy ratings didn't come into effect until 2002) £184.25/year
12 to 20 years E Rated or 2.0Wm2k £106.30/year
1 to 12 years old C Rated or 1.6Wm2k £47.24/year

Home Improvements That Don’t Cost the Earth

Windows and doors with lower energy ratings mean keeping your heating on for longer. You spend more money and use more CO2. Upgrading old inefficient windows and doors helps keep both these things down.

Human activity is adding too much CO2 to our atmosphere creating a devastating impact on our planet. As a result, the carbon cycle is becoming overloaded. The UK government has set a target of net zero carbon by 2050. If nothing changes, forest fires, heat waves and rising sea levels will only continue to intensify.

Upgrading from pre-2002 double-glazed uPVC windows to A-rated windows from us saves almost half a tonne of CO2 a year.

A typical house upgrading from pre 2002 double glazed PVC-U windows with gas heating to Anglian A rated windows £184.25
0.47 tonnes CO2
Annual Saving
4.7 tonnes CO2
10 Year Saving

To put that in context, 1 tonne of CO2 is the same as: The average emissions for one passenger on a return flight from Paris to New York OR Driving 6000km in a diesel car.

Anglian's responsible recycling

Responsible Recycling

As Britain’s leading home improver, we have a thorough recycling policy. When we remove your old inefficient windows and doors, we break them down to recycle as much as possible. We recycle parts of your old windows and doors into products such as loft insulation, plastic pipes and into non-visible areas of your new windows and doors.

Energy Efficiency Window Savings with Anglian Home Improvements

From selection to installation, we provide you with the best quality products and a seamless process. Your new windows from Anglian are A-rated as standard, saving you money and lowering your impact on the environment.

Learn more about the savings you could make with our energy-efficient windows and doors or to get started on increasing your home's energy performance.

4 steps to your new windows

  • 1

    Home or Virtual Visit

    Your local design expert talks you through the options and provides a free quotation.

  • 2

    Technical Survey

    Our technical surveyor visits your home to measure-up and check your order.

  • 3

    UK Manufacture

    Your windows are made to measure at state-of-the-art factories here in the UK.

  • 4

    Easy Installation

    Our team arrange a convenient time to fit your new windows.

Our Accreditations and Licenses

  • British Board of Agrement accreditation for uPVC windows from Anglian Home Improvements
    The British Board of Agrement provides certification on the quality of our products.
  • Anglian’s PVC-U Casement and Tilt & Turn windows have enhanced security performance.
  • BFRC logo
    The British Fenestration Ratings Council is the UK’s national system for rating energy efficient windows.
  • FENSA logo
    The Fenestration Self-Assessment Scheme ensures window installers comply with buildings regulations in England & Wales.
  • FSC standalone logo TIF green
    Look for our FSC® certified wooden window and door products on our website.
  • Glass and Glazing Federation logo
    Anglian is a leading member of the Glass and Glazing Federation (GGF).
  • Recovinyl Plus logo
    PVC Industry initiative to improve manufacturing, minimise emissions and develop recycling practices
  • TrustMark is a government endorsed not-for-profit organisation that operates through more than 30 scheme operators.