Gas condensing boilers are the most popular choice for heating and hot water in UK homes. These boilers use energy from natural gas and are clean and efficient to run. Our Gas Safe registered engineers are dedicated to providing you with the highest standard of service. Due to the quality of the domestic gas services we provide, the majority of our work is from repeat customers who understand and trust RTR in getting the job done: Whether it may be the installation, maintenance, or replacement of your boiler our engineers can do it all.