The Alpha E-TEC 28 is a compact. Condensing combi gas boiler. Combi boilers are a water heater and central heating boiler designed into a single unit so there’s no need for any tanks or cylinders. This makes them the perfect solution for smaller homes. It fits in a standard cupboard. The unit has worked very well since it was installed in early 2023. We are upgrading to a bigger unit given the needs of our remodelled home. The unit weighs up to 31.5 kgs.