One outdoor condenser connects to one indoor air handler. This is the most affordable and straightforward option for a single room or addition.
The most critical step is matching the unit's capacity (measured in British Thermal Units, or BTUs) to your room size. A common industry rule of thumb is . Room Size (sq. ft.) Recommended BTU Capacity Typical Room Type 150 – 300 6,000 – 9,000 BTU Home office, small bedroom 300 – 550 9,000 – 12,000 BTU Large bedroom, standard living room 550 – 800 12,000 – 18,000 BTU Master suite, open living area 800 – 1,100 18,000 – 24,000 BTU Large open floor plan Factors that increase BTU needs: buy mini split ac
Increase capacity by 10% for very sunny rooms; decrease it by 10% for heavily shaded ones. One outdoor condenser connects to one indoor air handler