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To determine whether a 0.80-ton air conditioner is sufficient for a room size of approximately 120 square feet, we need to calculate the cooling capacity required in British Thermal Units (BTUs) for the given space.

The general rule of thumb is to estimate the cooling capacity needed as follows:

1 ton = 12,000 BTUs

So, for a 120 square feet room, the required cooling capacity would be:

Required BTUs = Area in square feet × BTUs per square foot

Required BTUs = 120 sq. ft. × 20 BTUs/sq. ft. (for well-insulated rooms)

Required BTUs = 2,400 BTUs

Now, we need to convert this required BTU value into tons:

1 ton = 12,000 BTUs

0.80 tons = 0.80 × 12,000 BTUs

0.80 tons = 9,600 BTUs

Based on the calculations, a 0.80-ton air conditioner (which has a cooling capacity of 9,600 BTUs) would be more than sufficient for a room size of approximately 120 square feet, given that the estimated cooling requirement for the room is 2,400 BTUs.

It's worth noting that these are rough estimates, and several factors like room insulation, ceiling height, climate conditions, and heat-generating appliances in the room can affect the cooling needs. For more accurate sizing and to ensure the most efficient cooling, it's always best to consult with an HVAC professional who can take all these factors into account.

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