The Biffy Ambient Warmer is our complete cordless solution for naturally warmer water. The Ambient Warmer is a unique reservoir that passively raises the the water temperature to room temperature - without electricity! This is especially important because most bathrooms do not have an electrical outlet behind the toilet. Just like your Biffy, the Ambient Warmer is easy to install. It connects into the water supply line, warms the water and then supplies it to your Biffy. The colder the water supplied to it, the better it works! For Biffy devotees the Ambient warmer can be easily connected to your existing Biffy. Of course, the Ambient Warmer is warranted for one full year.