AC Tonnage Calculator Riyadh

Sizing an air conditioner in Riyadh? Because Riyadh has a very hot, arid desert climate, rooms need a different AC size than in a temperate region. The calculator below is pre-set to Riyadh’s climate — enter your room’s area for an instant tonnage. Riyadh sits in the heart of the Arabian desert — summer highs routinely hit 45–50°C with very dry air. The intense dry heat means the highest cooling multiplier of any climate here, so rooms need the largest tonnage step. Power is supplied by SEC.

AC Tonnage Chart for Riyadh by Room Size

These are typical AC sizes for Riyadh’s climate, for a room with an 8-foot ceiling and average insulation. Larger, top-floor, or west-facing rooms may need the next size up:

Sizing AC for Riyadh’s Climate

In Riyadh’s desert heat, choose high-ambient inverter units and don’t undersize — a unit that struggles at 48°C will run non-stop and still fall behind. The calculator applies Riyadh’s climate factor automatically; you can still fine-tune ceiling height, insulation, sun exposure, and room type above to match your exact space. Remember that an oversized AC cools quickly but short-cycles and dehumidifies poorly — matching the tonnage to the room gives better comfort and lower running costs.

Frequently Asked Questions — Riyadh

What size AC do I need for a bedroom in Riyadh? A typical 150 sq ft bedroom in Riyadh needs about a 0.5 Ton AC (4,247 BTU/hr). Larger rooms scale up per the chart above.

Why does Riyadh need a bigger AC than a mild climate? Riyadh’s very hot, arid desert climate raises the cooling load, so the same room needs more capacity than it would in a temperate region — the calculator applies that adjustment automatically.

How many BTU for a 150 sq ft room in Riyadh? Around 4,247 BTU/hr under standard conditions. Adjust ceiling height and sun exposure in the calculator for a precise figure.

Background reading: how the refrigeration cycle works.