What Size Air Conditioner Do I Need?

Understand which room details affect the air-conditioner capacity you may need.

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What Size Air Conditioner Do I Need? Sizing Guide

Start with the room before choosing the unit.

Air-conditioner capacity is shown in BTU/h and kW cooling capacity. The right starting point is the room and its heat load, not price or appearance alone.

Room details that affect sizing

  • Room length and width
  • Ceiling height
  • Room type
  • Sun exposure
  • Window and glazing level
  • Insulation quality
  • Roof or top-floor exposure
  • Number of regular occupants

How Click-Aircon uses those details

The Size Calculator uses the room information to produce an indicative calculated load and rounds up to the next supported standard capacity. It does not round down. Standard capacity steps include 9,000, 12,000, 18,000, 24,000, 30,000 and 36,000 BTU, subject to the products actually in stock.

When professional confirmation is better

Open-plan rooms, unusual layouts, commercial spaces and rooms with high heat loads should be assessed professionally before purchase. The online result is a guide, not a professional heat-load assessment.

Product availability, specifications and warranty conditions are model-specific. Check the actual product information supplied before ordering.
Use the Size Calculator

Need Help Choosing the Right Air Conditioner?

Use the Size Calculator for an indicative recommendation, compare products and request installation when you need it.