Tankless or ‘on-demand’ water heaters are a more energy efficient solution to the problems posed by old fashioned storage tank heaters. The water heaters of the past were ideal in their day, but in modern times we need a more practical solution.
Rather than store heated water in a giant tank, tankless heaters heat the water as and when you need it. This ‘on demand’ function makes them more energy efficient, and means you can save money on your energy bills each month.
One of main categories you will see mentioned about these units is the maximum water flow rate. This number should be one of your key considerations when browsing on-demand heaters. Measured in gallons per minute (GPM), this is the amount of hot water that will be available to your household at a particular time. The top models will give as much as 10 GPM, which will be enough for even the biggest of families.
Clothes Washer 3.3
Shower and Bathtub 2.5
Kitchen and Bathroom Sink 2.2 Dishwasher 1.3
If for example, you have two bathrooms and there are times when people will be showering simultaneously, then a model with a GPM rating of at least 4 would be desirable. However, a one bedroom home could suffice with something as low as 3 GPM. These GPM ratings also depend on the temperature of the incoming water. If you live in a cold area then expect the stated GPM value to be lower. This isn’t the only number that you should be checking though. Each model has its own sizing chart. This includes information about the flow rate, the number of hot water fixtures in a home, and the effect of temperature rise. The sizing chart displays how a water heater performs in each situation, so that you can make sure you get the right sized model for your home.
Lots More Info. Coming Soon !