The Sububan Dynaline 3 Packaged Terminal Air Conditioner (PTAC) combines economical gas heat and high efficiency electric air conditioning for year round savings and comfort.. With over 50 years of experience in the design and manufacturing of heating products, Suburban introduced the first PTAC with economical gas heat in 1985. The Dynaline 3 represents the 3rd generation of this original great concept. Three capacities are available, all operating efficiently and economically in zone systems. All units have individual controls, and operating costs can be controlled by setting the control at a maintained, desired comfort level, or interfacing into an energy management system. The look of the Dynaline 3 PTAC is compact, sleek and a soft champagne color. Small and snug against the wall, it complements any décor without commanding attention. DL3-0912 Provides a cooling capacity of 9,800 BTU/h along with 12,000 BTU/h of rated heating input. DL3-1220 Provides a cooling capacity of 11,700 BTU/h along with 18,000 BTU/h of rated heating input. DL3-1622 Provides a cooling capacity of 16,000 BTU/h along with 20,000 BTU/h of rated heating input.