What size does your water heater need to be to meet your family’s needs? When looking for a new hot water tank, most people will have to choose between the 40-gallon and the 60- gallon water heaters in the market. Which one will be perfect for your home? You will have to choose the capacity and size correctly to buy the right model and type. As you browse through all the different hot water tanks in the stores and the internet, you will have to pick the right one for your house, condo or apartment. What size of water tank do you really need? Does bigger really mean better when you are buying a water heater? Find out once and for all what capacity you really need: the 40-gallon hot water tank or the 60-gallon water heater.