The main differences between tank and tankless water heaters involve how they store and deliver hot water, as well as their efficiency and costs:
- Storage of Water:
- Tank Water Heaters: These units have a large storage tank (usually between 30 to 80 gallons) that heats and stores water until it’s needed. The water is heated continuously, even when not in use (known as standby heat loss).
- Tankless Water Heaters: Also known as on-demand water heaters, these units don’t store water. Instead, they heat water as you need it by passing it through heated coils, so they only operate when there’s a demand for hot water.
- Energy Efficiency:
- Tank Water Heaters: Less energy-efficient due to standby heat loss, meaning energy is wasted keeping the water hot in the tank even when it’s not being used.
- Tankless Water Heaters: More energy-efficient because they only heat water when needed, avoiding standby heat loss.
- Hot Water Supply:
- Tank Water Heaters: Limited by the capacity of the tank. If you use up all the hot water, you need to wait for the tank to refill and reheat.
- Tankless Water Heaters: Provide an endless supply of hot water, as long as the flow rate doesn’t exceed the heater’s capacity. However, the flow rate may be lower when running multiple fixtures simultaneously.
- Lifespan:
- Tank Water Heaters: Typically last 10-15 years.
- Tankless Water Heaters: Usually last 20+ years with proper maintenance.
- Installation Costs:
- Tank Water Heaters: Cheaper upfront cost, easier to install. However, they take up more space because of the large tank.
- Tankless Water Heaters: Higher upfront cost and installation is more complex, especially if retrofitting a home that had a tank system. But they save more on energy bills over time.
- Size and Space:
- Tank Water Heaters: Bulky, requiring significant space for the tank.
- Tankless Water Heaters: Compact and wall-mounted, taking up less space.
- Maintenance:
- Tank Water Heaters: Require regular maintenance, such as draining the tank to remove sediment buildup.
- Tankless Water Heaters: Require less frequent maintenance, but it’s still important to flush the system to prevent mineral buildup, especially in areas with hard water.
In summary, tank water heaters are less expensive initially and simpler to install, but less efficient and take up more space. Tankless water heaters cost more upfront but offer higher efficiency, endless hot water, and a longer lifespan. Tankless water heaters are also only recommended for homes with natural gas.
If you are interested in receiving an estimate for a tank or tankless water heater schedule a free estimate today and Total Air can help you decide which option is the best fit for you.
