| Compare | Gas Tank | Gas Tankless |
|---|---|---|
|
Cost |
Lower up front, higher over lifetime |
Higher up front, lower over time |
|
Lifespan |
10-15 years |
15-20 years |
|
During power outage |
100% gas dependent units will keep providing hot water |
No hot water |
|
Efficiency Rating |
60% + | stand by heat loss |
95%+ Efficeincy |
|
Warranty |
6-10 year tank/parts |
15 year heat exchanger, 5 year remaning parts |
|
Hot water capacity |
Limited to size of tank. Typically 40-75 gallons |
No holding tank, endless hot water |
|
Energy Savings |
Limited |
$100-$500 yearly depending on household usage |
|
Size |
More space needed to hold heater water |
Less space needed, hangs on wall |
|
Stand by heat loss |
Yes. Water is always heated weather or your using it or not |
No. Water isn't heated until needed |
|
Maintenace |
Most models self cleaning. Very minimal maintaince requried |
Yearly mainteance needed |