'Residential ACM
2.4.2 Combined Hydronic Space/Water Heating
2.4.2.2 Storage Electric Water Heater
2.4.2.3 Heat Pump Water Heater
2.4.3 Special Systems – Hydronic Distribution Systems and Terminals
'Standards
110.2 MANDATORY REQUIREMENTS FOR SPACE-CONDITIONING EQUIPMENT
120.9 MANDATORY REQUIREMENTS FOR COMMERCIAL BOILERS.