Carrier Transicold’s 2008 trailer product line-up offers better fuel efficiency and lower sound output than previous models. The units also feature engines that significantly surpass U.S. Environmental Protection Agency (EPA) interim Tier 4 standards (Tier 4i) and California Air Resources Board (CARB) emissions requirements. With a threshold of 0.3 grams per kilowatt-hour (g/kwh), the Tier 4i standard lowers emissions by 50 percent for trailer refrigeration units with 25-50 horsepower engines compared with the preceding EPA engine standard. Carrier units reduce particulate emissions 30 percent beyond the EPA standard, driving particulate emissions to only 0.214 g/kwh. That’s also 20 percent lower than competitive units with Tier 4i-compliant engines.
