BTU Calculator for Air Conditioning in the Algarve
Use our free BTU calculator to quickly estimate the cooling capacity your room needs. Getting the correct air conditioning size isn’t guesswork – it’s science. Too small, and your system struggles to cool during the Algarve’s intense 35°C+ summers. Too large, and you’ll face higher electricity bills, poor humidity control, and premature equipment failure.
Ideal for Algarve homeowners, holiday-rental managers and small-business owners looking to optimise comfort and energy use.
How It Works:
Simply add room length, width and height, select the room type and get an instant BTU recommendation that helps you choose the correct air conditioning unit, reduce running costs and avoid over-sizing.
Why Accurate BTU Calculation Matters:
Save Money: Properly sized units reduce energy consumption by up to 40%
Optimal Comfort: Achieve consistent temperatures throughout your space
Longer Equipment Life: Prevent system strain and costly repairs
Better Air Quality: Correct sizing ensures proper dehumidification
Our professional BTU (British Thermal Unit) calculator is specifically designed for the Algarve, taking into account the region’s unique climate factors. Whether you’re cooling a bedroom in Lagos, a villa in Quinta do Lago, or a commercial space in Faro, get professional-grade AC sizing instantly.
Frequently Asked Questions About BTU Calculation
Need help choosing a unit? Contact Algarve Seasons for a free site survey.
What is BTU and why does it matter for air conditioning?
BTU (British Thermal Unit) measures cooling power. One BTU is the energy needed to cool one pound of water by 1°F. For AC units, higher BTU = more cooling capacity. Choosing the correct BTU ensures your system efficiently cools your space without wasting energy.
How many BTU do I need per square meter in the Algarve?
Generally, Algarve properties need 200-250 BTU per cubic meter due to intense sun exposure and high summer temperatures. However, factors like insulation quality, window type, and sun exposure significantly affect requirements—which is why our calculator considers all these variables.
What happens if my air conditioner is too small?
An undersized AC unit will run constantly, struggle to reach desired temperatures during peak heat, consume excessive energy, and wear out prematurely. In Algarve’s 35°C+ summers, proper sizing is critical for comfort.
Can an air conditioner be too big?
Yes. Oversized units “short cycle”—turning on and off frequently without properly dehumidifying the air. This leads to clammy indoor conditions, higher electricity bills, and reduced equipment lifespan.
Does this calculator work for heating requirements too?
Yes! Modern Daikin AC units are heat pumps, providing both cooling and heating. The calculator accounts for thermal load in both directions, though Algarve’s mild winters typically require less heating capacity than summer cooling.
What's included in the BTU calculation?
Our calculator factors in room volume, insulation quality, building age, window type and quantity, sun exposure, occupancy, heat-generating appliances, and Algarve-specific climate data for the most accurate sizing.