Colonial house built under the current tendency to "Open Space".  - A lot of efficient windows with lots of light to enter into the house assisting in internal lighting and contributing to electric power savings.  - "Spray Foam Insulation" - thermal insulation more efficient currently available.  - "Tankless Water Heater" - efficient water heating technology that saves energy / gas.  - Two HVAC units (basement and attic) of last generation, which provides low consumption of gas and electric power. (One unit only consumes much more energy)  - Lighting of the kitchen with "Smart LED Downright" - Control of power of light using "smart phone" or "smart device" with ultra low consumption of electrical energy.  - The lamps of the house are LED.  - refrigerator, stove and dishwasher with a 5-year warranty and microwave 3-year full warranty  - The house for its efficiency set this satisfying the requirements of the program  "Mass Save - Savings Through Energy Efficiency" state of Massachus