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The Daikin DSG1803DH00001S is a 15-ton commercial gas/electric packaged rooftop unit designed to provide reliable year-round heating and cooling for commercial buildings. Combining 400,000 BTU/h high-stage gas heating input with 172,000 BTU/h of cooling capacity, this all-in-one rooftop system helps deliver dependable comfort while simplifying equipment placement and preserving valuable indoor space.
The integrated gas furnace provides 400,000 BTU/h of high-stage heating input and 324,000 BTU/h of high-stage heating output, with 300,000 BTU/h low-stage input and 243,000 BTU/h low-stage output. Two-stage gas heating helps match heating output to changing comfort requirements. The heating section uses eight burners and a dual-diameter tubular heat exchanger with Wrinkle Bend Technology. The unit provides 81% thermal efficiency, with a high-stage temperature-rise range of 25–55°F and a low-stage temperature-rise range of 15–45°F.
The cooling system provides 172,000 BTU/h of nominal cooling capacity with a 14 IEER and 10.8 EER efficiency rating. The system uses R-32 refrigerant and two single-stage scroll compressors that are individually circuited. Copper tube/aluminum fin evaporator coils and microchannel condensers support efficient heat transfer and dependable cooling performance for larger commercial spaces.
With a 14 IEER and 10.8 EER efficiency rating, the DSG1803DH00001S is designed to provide dependable and efficient commercial cooling performance. Two direct-drive supply fans provide a combined nominal airflow capacity appropriate for the unit's 15-ton cooling capacity while eliminating belt-driven fan components. The two individually circuited scroll compressors provide separate refrigeration circuits for staged cooling operation.
The packaged rooftop configuration combines the gas furnace, compressors, coils, supply fans, and controls into a single outdoor unit, helping simplify equipment placement and preserve valuable indoor space. Daikin designed the DSG Series 15–25 ton units for both new construction and retrofit applications, with convertible airflow orientation for downflow or horizontal installations. The DSG1803DH00001S uses a 208/230-volt, three-phase, 60 Hz electrical supply and measures 133 7/8 inches wide by 88 1/2 inches deep by 51 11/16 inches high. The unit has a sound level of 80.4 dB(A) and a shipping weight of 2,037 pounds.
The DSG1803DH00001S features a 24-volt electromechanical controls package and two individually circuited scroll compressors for staged cooling operation. Two-stage gas heating provides high- and low-stage operation, while two direct-drive supply fans provide dependable airflow. Convertible airflow orientation allows the system to be configured for either downflow or horizontal applications.
The Daikin DSG1803DH00001S is designed for larger commercial rooftop applications where dependable gas heating and electric cooling are required from a single packaged system. Its 15-ton cooling capacity, 400,000 BTU/h high-stage gas heating input, dual refrigeration circuits, two direct-drive supply fans, and convertible airflow configuration make it well suited for applications such as retail spaces, offices, restaurants, schools, warehouses, and other larger commercial buildings.
The DSG1803DH00001S is designed with service accessibility in mind, including tool-less filter access and an accessible internal controls section. Screw-on style pressure switches are used for ease of replacement, while the two individually circuited refrigeration systems provide separate cooling circuits for service flexibility. The direct-drive supply fans eliminate belt and pulley maintenance associated with belt-driven blower systems.
The Daikin DSG1803DH00001S includes a 20-year heat exchanger limited warranty and a 5-year parts limited warranty. Complete warranty details are subject to the applicable Daikin warranty documentation and terms.
Experience reliable year-round commercial comfort with the Daikin DSG1803DH00001S. Combining two-stage 400,000 BTU/h gas heating and efficient 172,000 BTU/h electric cooling with two individually circuited scroll compressors and two direct-drive supply fans in one packaged rooftop system, this 15-ton unit provides a practical, flexible solution for larger commercial applications.
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