United States - Relative Importance Weights (Contribution to the Total Industrial Production Index): Manufacturing: Durable Goods: HVAC, Metalworking, and Power Transmission Machinery (NAICS = 3334-6) was 1.66% in March of 2024, according to the United States Federal Reserve. Historically, United States - Relative Importance Weights (Contribution to the Total Industrial Production Index): Manufacturing: Durable Goods: HVAC, Metalworking, and Power Transmission Machinery (NAICS = 3334-6) reached a record high of 3.58 in May of 1973 and a record low of 1.43 in June of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Relative Importance Weights (Contribution to the Total Industrial Production Index): Manufacturing: Durable Goods: HVAC, Metalworking, and Power Transmission Machinery (NAICS = 3334-6) - last updated from the United States Federal Reserve on April of 2024.