No Risk To Calculator

Listers has an energy saving calculator on its own website which is also available as a no risk plug-in to installers to host on their own sites. It will help sell thermally efficient windows and doors in this time of energy crisis.

The calculator illustrates the potential energy-saving benefits to homeowners of upgrading their windows to modern, efficient alternatives from the national fabricator.


Cost savings

The energy calculator uses estimated U-values for older windows, the published U-values for Listers’ energy saving products, the home’s glazed area and the price of energy to determine the likely cost savings.

In a typical example, a homeowner in an electrically heated semi-detached property, who replaces single-glazed PVC-U windows with double-glazed Veka windows from Listers, could save £15,290 over ten years and reduce carbon emissions by 28,760kg. The price of the windows would be in the region of £8,000.


 “Some homeowners are bringing forward home improvement plans to make sure they are not paying more than they need to by.”

– Roy Frost 

Managing director, Listers


Powerful sales message

“Driving today’s window and door buying decisions, is the cost of energy,” continues Listers’ Frost. “Insulating homes and reducing energy usage are key for many households going into 2023, as the risk of further hikes in energy bills is very high. A typical home upgrading their windows today could see their investment paid back in just five years. This is a powerful sales message as the market contracts.”


Energy price predicted to rise

The government introduced the Energy Price Guarantee in October 2022, which is expected to run in its current form until April 2023. This capped the cost of energy at 34p/kWh for electricity, and 10p/kWh for gas, while the wholesale price of gas continued to rise. Once this cap is lifted, then households’ energy bills could potentially rocket.

“Some homeowners are bringing forward home improvement plans to make sure they are not paying more than they need to by the time April 1st comes around,” says Frost.

“Since the market is being driven by a smaller number of buyers, each with access to a larger pot of money, we are seeing a corresponding increase in the demand for high-end products and that is driving up sales of our premium collection of products, such as Sheerline aluminium windows and doors and the Residence Collection PVC-U timber alternatives.”


Part L compliant

Listers’ Sheerline roof lantern and the Prestige window range can offer U-values as low as 1.3W/m2k with a double-glazed unit, and 0.9W/m2k with triple glazing. The range has recently been expanded to include the Sheerline Classic Window.

On the PVC-U side, Listers’ Residence 9 range can achieve U-values as low as 1.23W/m2k with 28mm double glazing and 0.84W/m2k with 44mm triple glazing. This comfortably meets the latest part L revisions, while giving plenty of headroom for further tightening of the building regulations, according to the company.


Picture: Hosted on Listers’ own website or available to retail companies to host on their own websites as a simple plug-in, the energy calculator has a user-friendly interface that encourages homeowners to compare a modern window installation with their current set up.


Article written by Cathryn Ellis
11th January 2023


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