# Aircon BTU Calculator for Singapore Homes

Calculate the BTU capacity you need for each room in a Singapore home based on floor area, sun exposure and occupants, and what system-3 or system-4 setup fits an HDB flat.

Interactive tool: https://lookup.sg/tools/aircon-btu-calculator

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Source: Lookup (https://lookup.sg) · Data as of October 2026 · Listings compiled from Singapore government open data (data.gov.sg), OneMap and Overture Maps places. Free listings never show contact details; featured listings are labelled.