Engine 622 and Tower 606 were alerted to Regina Dr in Sterling for a house fire. First arriving units went on scene with heavy smoke showing. E622 arrived on the scene 3rd due and stretched a line to side C and extinguished fire on the first floor. Tower 606 arrived on the scene and went to work ventilating and opening up in the fire room. Fire involving 2 rooms on the first floors was knocked, units went ready shortly after overhaul.