Thinking of getting new windows? Are you stuck whether to spend more money and go for the most energy efficient or go for the cheapest option and hope for the best? This blog will help you understand the aspects of energy efficiency and get you to the decision you have been struggling to make.
This is a significant consideration when getting some new windows. It is said that “Heat gain and heat loss through windows are responsible for 25%–30% of residential heating and cooling energy use.” Windows are rated from A++, the most efficient to G, the least efficient. Double glazing should be between A+ and C with the right insulation.
Things effecting energy efficiency:
- There is gas placed between the glass panels which effects the way your energy efficiency performs. For example, Argon is more insulating than normal air or a vacuum.
- How the glass is treated also effects the energy efficiency. If you have low emissivity glass with a metallic coating, this allows natural light to beam in and reflects back the heat in the room.
- The choice of frame is also significant. UPVC is the most popular material as it is cheap but also very good at insulating. Wood is also a good option however it requires more regular maintenance and painting
Low U, High R Values
The energy rating is decided through U and R values. A low U value signifies the glass of double glazing letting through a small amount of heat. A high R value highlights the mark of overall energy efficiency of glass.
Cost of double glazing
There is a significant difference in cost when choosing between an A+ and C rated windows. However, there is no great difference in the energy efficiency with the A+ saving you £30 to £50 in fuel costs over a year. If your budget is limited, you should go for the C rated windows as this is a chance to save money.
Is triple glazing the answer?
Triple Glazing is drastically more thermally efficient but costs extra. The North of England are more likely to need the triple glazing as it a lot cooler up here compared to the South. If you require more assistance, we have a blog on whether to choose double glazing or triple glazing here.