Energy Ratings

St Johns Window Centre manufacture the widest range of Energy Efficient Rated Products in Worcester.

St Johns Window Centre manufacture products that are certified within CERTASS Thermal Ratings Register ensuring you the customer get what you ordered and our manufacturing and processing systems are third party audited which we believe gives a better product than some simplified systems which allows substituting of products.

Visit to view scheme details.

The outer pane of double glazed units on these products is low iron which allows solar gain and spacer bar is Swisspacer U Warmedge.

Please phone to discuss technical side of this scheme.