Energy efficiency
Our double glazed windows are the ultimate in energy and performance

Energy efficient double glazing windows

Our windows are all rated A+ in terms of efficiency, and that means you get market-leading quality when you buy from us. We are confident that our windows beat those offered by most of our competitors.

Customers have become more conscious of energy ratings in recent years – partly because the government has put more focus on the ratings, partly because people are generally more aware of the environmental impact of their purchases, and partly because energy-efficiency quickly translates into financial efficiency.

Our energy efficient windows prevent the escape of internal heat from your home while allowing natural heat in, and you could see the amount of condensation reduce by as much as 80%.

In the short term, your heating bills could be cut considerably. But there’s also the impact on the future price of your home – having top-notch windows with great energy-efficiency will prove attractive to future buyers.

Good looks are just as important, of course, but you can rest assured that our windows hit the highest standards of energy-efficiency as well as being fabulously designed products.

Here are all the features and benefits:

A+ thermal performance

Only the very best energy efficient window products are used to give you ultimate cost savings year after year

Multi-chamber outer frame

The leading global window system is a five-chamber system for improved thermal efficiency, maximum strength and enhanced security


A new generation of weather resistant gasket seal offers exceptional compression sealing – keeping your energy efficient windows weather tight without reducing performance over the years

Improved drainage

Our improved drainage path allows water to drain more efficiently and reduce moisture in the home

Surface finish

All our products are renowned for quality, that provides a long-lasting pristine appearance with little or no maintenance

Reduced heat loss

Our energy efficient window systems feature a warm edge spacer which is up to 22x more efficient at preventing heat transfer around the window edge and up to 75% lower vapour transmission rate, increasing the life of your window

Advanced security

Patented by Yale® the Blade Lock is the strongest, safest, highest performance and most secure window lock on the market. Features include over 3 times more locking engagement with the window frame than other locks

Customer Reviews

Special offers: Big Savings – Save up to 30% OFF, backed by our Price Promise!

Our energy efficient double glazing windows - Solar gain, free heat

Unbeatable energy ratings

Under the government’s building regulations, all double-glazed windows must comply with energy ratings set by the British Fenestration Rating Council (BFRC). The scheme uses a rainbow system, with ratings from A+ to G dependent on energy-efficiency levels. A+ is the most efficient and G the least efficient.

First Home Improvements is a BFRC-authorised installer and we are audited to demonstrate the accuracy of energy-efficiency. Our PVCu/uPVC windows have earned A+ ratings, and our superior design and insulation makes all the difference to the performance of our products.

The next windows you choose could reduce wasted home energy by up to 30%

If the windows in your home consist of single glazed or older double glazed units, replacing them with our energy efficient double glazed windows will save you money. It can reduce the energy you need to heat or cool your home by up to 30%.

Our double glazing windows also reduce condensation and noise.

Energy efficient windows – at the right price

Our energy efficient window system brings together market leading components to deliver exceptional performance. This means using thermally efficient clear glass and the multi-chamber outer frame (for improved thermal efficiency) is used in the sealed unit. Our window profiles include ActiveSeal, a new generation of weather resistant gasket seal (offers exceptional compression sealing), high security locking feating the new revolutionary Blade Lock (by Yale) and stainless steel hinges.

How do we do it?

The profile

1) ActiveSeal weather seals – Our double glazed windows feature the innovative ActiveSeal. Offering exceptional compression sealing with high performance over a wide temperature range, they don’t shrink or stretch. Instead they retain their original shape year after year to maintain an excellent weather seal.

The unique construction actively absorbs noise pollution, increasing acoustic insulation. Immune to rot, mould, mildew, UV and ozone, CFC-free ActiveSeal will last the lifetime of a window.

2) Multi-chamber construction and insulated beading Our multi chamber construction is designed to improve strength, thermal and acoustic performance.

3) Bevelled or featured sash, frame and beads The double clipped hollow glazing bead is designed to aid thermal performance.

Other features

Stainless steel friction hinges – High performance, superior quality.
High security Blade Lock system – Peace of mind with ease of operation.

The glass

4) Thermally efficient clear glass – The range offers proven products and technologies to meet a range of Window Energy Rating and Building Regulation requirements. Providing the Leading Low E glass in the UK, the glass also offers a good balance of U and G values, helping your customers to retain costly energy and exploit radiant heat from the sun.

Have more questions about double glazed windows? Check out our window frequently asked questions page.

Request a Free Quote

    * means this field is required.

    This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.