## Determining the Right Tank Capacity

The formula to determine the capacity of the tank

Capacity = Usage * Number of Users

Capacity: The amount of volume needed to meet the needs of clean water for 1 day (liters / day)

Usage: The amount of clean water usage per user in 1 day (liter / user / day)

Number of Users: The number of clean water users in 1 day.
The user unit depends on the type of designation of the building. (see table)

Building Allocation Use of Clean Water Units
Luxury Villa 600 Ltr / occupant / day
Luxury House 450 Ltr / occupant / day
Premium Home 300 Ltr / occupant / day
Ordinary Home 250 Ltr / occupant / day
Luxury Apartment 250 Ltr / occupant / day
Flats 200 Ltr / occupant / day
Doctors Clinic 150 Ltr / visitor / day
Luxury Hospital 150 Ltr / bed of patient + Visitor/ day
Hospital Medium 80
General Hospital 50
Primary School 15 Ltr / student / day
Junior high school 25
High school 25
College 20
Hostel 80
Home Shop / Home Office 100 Ltr / occupant & employee / day
Office building 50 Ltr / employee / day
Convenience Stores (Department Stores, Malls, Department Stores) 5 Ltr / m 2 floor area / day
Factory / Industry 50 Ltr / employee / day
Station / Terminal 3 Ltr / passenger arrives and leave / day
Airport 3
Restaurant 15 Ltr / chair / day
Performance Building 10 Ltr / chair / day
Theaters 10 Ltr / chair / day
Budget Hotels up to Star 2 150 Ltr / bed / day
3 star hotel and above 250 Ltr / bed / day
Worship Hall 5 Ltr / person / day
Library 25 Ltr / visitor / day
Bar Bar Ltr / visitor / day
Laboratory 150 Ltr / staff / day
##### Example Calculation
###### The capacity of the tank needed for a luxury house with as many as 4 people is:

Tank capacity = 250 liters / occupant / day x 4 people = 1,000 liters / day