Most combi boilers will output at least 1.5 Bar of pressure, which is sufficient. However, because you will usually have a mains pressure cold water feed, it is essential that a pressure equalising valve is used, to ensure the hot and cold water is at the same pressure. What this means is that once fitted, as long as your initial water pressure exceeds 1 – 1.5 Bar, you should be quite able to operate your home steam room with your existing combi boiler. As an average figure for combi boilers is around 1.5 – 3.0 Bar, most will offer enough pressure. Depending on the size and scale of your proposed steam room, you may wish to opt for an additional hot water source. This could be the fitting of a dedicated boiler just for the steam room in the case of larger installations or possibly choosing a more powerful combi boiler with an up rated capacity to ensure endless supplies of invigorating steam. Checking your boilers hot water supply meets the recommended levels issued with the steam room you choose is an important factor to remember. It is vital not to forget the importance of installing either the pressure equalising valve or the pressure reducing valve to ensure equal pressure across both hot and cold feeds, avoiding and eliminating hazards such as scalding heat or freezing temperatures. Here at sobathrooms.com we have the professional expertise to offer the correct advice and assistance, answering your questions in a jargon free manner to give you the answers you may be searching for. Our experts are on hand to help you when choosing the perfect steam room solution to suit your requirements. In addition we are an established company that has the capacity, knowledge and resources to assist with all your shower, steam room and heating needs.