ACCA Residential HVAC Design case studies
ACCA Residential HVAC Design · Put your knowledge to work in context.
The ACCA Residential HVAC Design exam is an independent study resource for HVAC professionals preparing to design and specify residential heating, ventilation, and air conditioning systems. It is aimed at contractors, designers, installers, and technicians who want to demonstrate working knowledge of load calculation, equipment selection, duct design, quality installation practices, refrigerant safety, and the business and code context in which residential HVAC work is performed. The ACCA Residential HVAC Design case studies are 5 cases and about 3,723 words.
1Sizing a Replacement System for a Tight, Well-Insulated House
A 2,400 sq ft single-story house in Climate Zone 4A has been retrofitted with spray foam insulation and new double-pane low-E windows. The homeowner complains that the existing 5-ton single-stage air conditioner short-cycles and does not dehumidify well.
656 words, about 3 min2Duct Design for a Retrofitted House
A contractor is designing a duct system for a 1,800 sq ft house with a 3-ton air conditioner. The house has a full basement and a single-story living area above.
931 words, about 5 min3Quality Installation: Commissioning a New System
A contractor has just installed a new 3-ton split system air conditioner and gas furnace in a 2,000 sq ft house. The system includes a matched evaporator coil, a variable-speed air handler, and a new duct system.
708 words, about 4 min4Refrigerant Safety: Leak Detection and Repair
A service technician responds to a residential call for a 3-ton R-410A split system that is not cooling adequately. The technician finds that the system is low on charge and suspects a leak.
682 words, about 3 min5Business Operations: Permitting and Code Compliance
A residential HVAC contractor is hired to replace a failed 20-year-old furnace and air conditioner in a single-family home. The homeowner wants a like-for-like replacement: a 100,000 Btu/h 80% AFUE gas furnace and a 3-ton 13 SEER air conditioner.
746 words, about 4 min