Reports results from an air conditioning contractor survey of residential air conditioning sizing methods in Florida. Results indicate that 33% of the respondents use the Manual J procedure, 34.4% use software, 24.2% use square footage, and 8.4% use other estimates. A room-by-room method of sizing is used by 52%. Some 38.5% say they have purposely oversized units, and 63.6% indicated they would use a split central unit smaller than 15,000 Btu/h if available.

KEYWORDS: year 1995, domestic, air conditioning, surveys, sizing, oversizing, calculating, questionnaires, USA