Save money by reducing electric consumption & concentrating cooling and heating where you need it, even if you have central air cooling and heating. The TAD-T40LW rolls easily from room to room. 14,000 ASHRAE BTU (Cool)/ 8,000 DOE BTU (Cool)/ 11,000 BTU (Heat). Double duct-intake hose and exhaust hose provide 20% to 30% greater efficiency than a single duct unit.