There are many instant water heaters on the market, and one of the most popular is the bosch aqua star tankless water heater. Many people still fear that such a unit will not meet their needs, so here we will look into this question.
Bosch tankless hot water heater, since they are tankless, have to heat the water as it comes through the pipes from your mains source, or from a well.
This means on demand water heaters like those bosch make need to worry about two things - at what rate the water passes through the unit, and how cold the water is to begin with.
The water rate depends, at a basic level, on how big the faucet is, how much water the dishwasher demands, or how powerful the shower is. The smallest unit amongst the bosch aquastar tankless tankless water heaters is the 125 - it is almost pocket-sized and only claims to heat a single faucet at a time, making it about right for a camp or cabin setup. There are of course bigger units that will service more and more water demands - the thing is to choose the right unit.
So far as the second question (how cold is the water) is concerned, it is worth remembering that most people over estimate the hotness they want - usually 98 to 102 degree Fahrenheit is hot enough. To give you an idea, Jacuzzi and Spa temperatures are limited to no more that 104 degrees F by Federal law!
This means that tankless water heater bosch makes only need raise the temperature by about 70 degrees Fahrenheit - something that they can do happily.