Testing process

The design and development of every Rangemaster cooker begins with a clear priority: to ensure food is cooked efficiently, safely, and reliably. From the outset, we adhere strictly to British and European standards, including BS EN 50304:2009 and BS EN 60350:2009, along with all relevant safety regulations. These standards guide our engineering process, ensuring that every cooker meets the highest levels of performance, quality, and safety before it reaches your kitchen.

We know that actual cooking in the oven is vital during its development.  Rangemaster uses small cakes to determine the heat distribution in electric ovens.  These cakes are always made from the same ingredients and 28g of the raw cake mixture is weighed into each greaseproof paper cake case.  Even the size and grade of paper of these cases is laid down in the standard.  After cooking, the tops and bases of the cakes are examined to note any differences in browning.  If the cakes are not evenly browned, we go back to the development engineers who will make some changes to the oven cavity to remedy any unevenness and then test cooking is done again to verify the changes.

As well as small cakes, we use scones and fruit cake which cover 3 different cooking temperatures - cool (fruit cake), medium heat, (small cakes) and scones (high temperature). Apple pies are used to check if the oven can cope with a heavy load.  Once again the colour of the base and top is checked and that the filling is cooked.

At Rangemaster, we pride ourselves on designing some of the largest oven cavities on the market- ideal for busy households and perfect for family cooking. To ensure our ovens meet real-life needs, we go beyond technical specifications: we actually cook a full meal in every model during development. This includes making sure there's ample space for a generous 11.3kg (25lb) Christmas turkey, so you can confidently prepare festive feasts or large family roasts without compromise. It's just one of the many ways we make sure our cookers deliver both performance and practicality for everyday life.

The hob, being a vital part of cooker is also subjected to testing.  Can the burners be turned right down without the flame going out?  Of course!  Are the zones on an induction hob as responsive as they should be? Yes! The griddles provided with your Rangemaster are thoroughly tested to see if the coating is non-stick during cooking and cleaning and the triple ring burners and wok cradle are checked out using our Rangemaster non-stick wok.

When it comes to perfecting our grills, we take testing seriously to ensure consistent, high-performance results. One of our key methods involves using toast to precisely measure grill efficiency - we calculate the percentage of browning across the entire grilling area and assess how quickly and evenly it occurs. But we don’t stop there. We also cook beef burgers under the grill to evaluate the uniformity of cooking and browning, ensuring even heat distribution and reliable performance. These detailed tests help guarantee that every Rangemaster grill delivers not just speed, but the kind of quality cooking you can rely on every time.