A non-combi boiler is a type of boiler that does not provide instant hot water on demand. Instead, it heats water in a separate storage tank, which is then circulated through the home’s hot water pipes. Non-combi boilers are typically more reliable and efficient than combi boilers, as they don’t require the same level of maintenance and can be more easily repaired. Additionally, non-combi boilers are better suited for larger homes with multiple bathrooms, as they can provide hot water to multiple outlets at once. However, non-combi boilers can be more expensive to install and require more space than combi boilers, as they require a separate storage tank. Furthermore, they are not as energy efficient as combi boilers, as they use more energy to heat the water in the storage tank. Despite these drawbacks, non-combi boilers are still a popular choice for many homeowners, as they are more reliable and provide a steady supply of hot water.