When the manufacture of other cooking and heating equipment left Trafford Park, that of tubular-sheathed elements was retained, and in 1931 a 'radiant' type of boiling plate was developed. In this a tubular-sheathed element in grid form was fixed above a reflector and designed to run at a red heat, thus avoiding the slow heating of the solid cast iron plate and the necessity for good contact between plate and saucepan or kettle. The first of these boiling plates were sold in 1932 and at once attracted attention, partly by their psychological appeal to housewives who like something glowing. Within two years the department had outgrown its accommodation and was laid out for mass production in G aisle.

The Sunvic vacuum switch, contained in a glass envelope, was introduced in 1932 for the control of electrically heated ovens, furnaces and so on. Originally invented and produced in Germany, the switch was developed in the Company's instrument and meter department with the result that its use expanded considerably. This led to the production (for Sunvic Controls) of apparatus for the domestic field, notably the Simmerstat for the gradual control of electric boiling plates and thermostats for controlling water heaters, domestic ovens, heating pads, and so on.