Despite their reduction in dimensions, they will still provide the safe and silent operation experienced by our 6,500 installed users. Protecting the exposed and sharp edges of corners is a key safety feature, and allowing the ThermaSkirt to expand and contract (as all heating products must) without the associated creaks groans and clicks common on other systems, is a must. The new fully flexible top gasket is much simpler to fit and does not require cutting to length – the new covers clip on without the need for trimming the gasket to suit.