Whatever your choice, it’s essential to shop around and speak to as many installers and providers as possible happy heating! But he cannily failed to mention the boiler is covered by the manufacturer’s warranty for the first year anyway. I don't have vinger to mix or soda plz help what else can i use? The combi boiler is a high efficiency water heater, as well as providing. The asap team was fast and did a great job they were very knowledgable and.