How is the Heat Cube better than most electric heaters?

The new Calor Heat Cube portable gas heater in stock at Towler & Staines boasts lower running costs than most electric heaters and instant heat fully controllable and quicker than most electric portable heaters. How can these claims be justified?

The answers are that running costs for the Heat Cube are lower when compared with standard rate electricity at 15.21 pence per kWh as at September 2015. The source is Sutherlands Tables September 2015.

The speed of room heating comparison is based on laboratory testing conducted by the British Standards Institute in August 2015 of the Calor Heat Cube when compared with oil filled radiators and convector heaters based on heating to 21 degrees Celsius and allowing for adequate ventilation for the Calor Heat Cube. 

It is officially a great heater, get one today!

Calor Heat Cube portable gas heater
http://www.towler-staines.co.uk/shop/141-mobile-heaters