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2 ton
By the cooling load of the home only.
Rule of thumb is 500sf per ton. 1500sf = 3 ton
25 cubic feet
The average cost to recharge a home heat pump can vary depending on the size and type of heat pump, the refrigerant needed, and local labor rates. On average, it can cost between $300 to $1000 to recharge a home heat pump. It is recommended to consult with a professional HVAC technician for an accurate estimate.
4-5 tons
The size of a heat pump that you can use for a pool which is 18 feet wide by 33 feet long and has a depth of 4.5 feet can vary depending on specific brand of heat pump you wish to purchase. The minimum size of heat pump for an above ground pool of this size in 102,000 BTU.
it is a 12 seer 4 ton heat pump
2.0 ton or 2.5 ton
The rule of thumb is 2-1/2 tons per 1000 square feet.
Please be more specific about 'service'.
Check your owners manual for details.