Water Heater Size Calculator
Inputs
people
°F
°F
$/kWh
Tab to move between fields
Results
Tank Size
75 gal
≈ 15 buckets
Peak Hour Demand48 gal
Tankless GPM Needed6 GPM
Temperature Rise70°F
Est. Annual Cost$996.00
1
Identify Input Parameters
4 parameters
= Household Size = 4people, Peak Hour Usage = 2, Incoming Water Temp = 50°F, Desired Hot Water Temp = 120°F, Electricity Cost = 0.13$/kWh
= 5 input(s) provided
2
Calculate Tank Size
Tank Size
= 75
= 75
3
Calculate Peak Hour Demand
Peak Hour Demand
= 48
= 48
4
Calculate Tankless GPM Needed
Tankless GPM Needed
= 6
= 6