August is the month Florida air conditioners quit. When the vents blow warm at nine at night, the tenant dials one number. A Synergistic Property Manager takes that report and sends a licensed HVAC vendor out, then tells the property owner what failed and who owes the bill. That second question has an answer most owners guess wrong. Highlights     Florida law does not require a rental to include air conditioning, and the statute listing heat, running water, and hot water excludes single-family homes and duplexes.     Once cooling is written into the lease, keeping it working becomes an owner...