Sheffield Window Centre has successfully upgraded its standard trade and retail window from a WER B to a WER A rating simply as a result of switching to one of the new REHAU TOTAL70 multi-chamber profiles.

Using the same Planitherm Total+ glass and the same Swisspacer V spacer bar as previously, the successful REHAU fabricator has seen its standard window improve from a B rating using the REHAU TOTAL70 three chamber profile to an A rating using the new five chamber solution.

Director Ian Hunter says: “We were scoring a high B with our existing REHAU TOTAL70 profile and the additional thermal performance of the new five chamber profile was all that was needed to move us up to an A.

“For us, it’s a really cost effective way of achieving the A rating which we know our retail customers in particular are looking for, and it will give us a real marketing boost moving forward.”

REHAU’s Technical Applications Engineer and energy ratings guru Dean Franklin helped Sheffield Window Centre with the simulations necessary to demonstrate the A rated performance and the company also used REHAU’s online thermal calculator at target=”_blank”> to generate the official WER A rating labels.

Ian Hunter adds: “Previously, our costs for upgrading a window from a B to an A were around £10 per square metre because we had to change the glass and the spacer bar. Using the new profile, it is only a tiny fraction of that and we’re actually now able to offer a WER A rated window for the same price as a B.

“From our point of view, the new profiles have delivered exactly what REHAU promised and we are now using the fully reinforced five chamber option in white and foiled finishes for everything except our very largest frames.”

Sheffield Window Centre has begun a major new consumer promotion campaign based around its A rating with new advertisements in the local press, new point of sale material in its two Sheffield showrooms and a newly designed website.

Further information on the REHAU TOTAL70 profiles is available at and on Sheffield Window Centre at