If you've ever been the last person to shower in the morning, you know the misery of a cold shower. Traditional tank water heaters store a finite amount of hot water. Once it's gone, you have to wait. Tankless water heaters solve this problem entirely by heating water on-demand.
The Case for Tankless
The biggest advantage is the infinite supply of hot water. Additionally, tankless systems are far more compact, freeing up valuable floor space in your basement or utility closet. Because they don't expend energy keeping 50 gallons of water hot 24/7, they are also more energy-efficient, translating to lower utility bills. However, they do have a higher upfront installation cost compared to a traditional tank swap.