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Quick estimates before you talk to a supplier.

Rough sizing for early planning and budgeting, so you know if a quotation makes sense. For permits and final equipment selection, you need a proper engineering calculation.

Aircon sizeWater tankGenset size
Tool 01

How big should my aircon be?

For one room. Enter the room size and how many people are usually inside.

Tool 02

How big should my water tank be?

For domestic water: drinking, toilets, showers and washing.

Liters per person fills in automatically when you change the building type. Use 2 or more days if water service in your area is unreliable.

Tool 03

What size generator do I need?

List only what must keep running during a brownout.

Add up the HP of every aircon. Example: 3 × 2 HP = 6

Small store: about 2–5 kW

1 HP motor ≈ 0.75 kW

Freezers, computers, machines

Need the real numbers?

These are rough estimates. For permits, BFP and buying equipment, let us do the proper calculation.

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