Three models are available: 26k W, 33k W & 38k W One single appliance to install so it quick & easy, Built-in pipework; no extra space at the side of the product needed, Minimum overall height increase gives easier site installation, Neat & tidy appearance Compact & light solution for new build or retrofit installations, High DHW efficiency gives reduced running costs, Higher DHW flow rates than standard boiler Approx. 10% increase, Less waste DHW water as DHW inlet is preheated Reduced pluming on DHW 2 year parts & labour warranty