What is ZEH (Net Zero Energy House) ...

It is a house that makes the living energy “0” by “reducing” and “creating”
Primary energy consumption
Energy saving (insulation, high-performance equipment, etc.)
Energy creation (such as solar power)
Energy consumption is “0” for less than 1 year of residence

Energy consumption is “0” for less than 1 year of residence

Primary Energy Consumption

It is an energy source as it exists in the natural world that is necessary for power generation, such as oil, coal, chemical fuel, natural gas, water power, solar heat, etc.
Electricity or gas, produced by processing primary energy, are said to be secondary energy. In other words, reducing the amount of secondary energy consumption at homes such as air conditioner, hot water, and light leads to the reduction of primary energy.

Comparison of energy consumption: General House vs ZEH (Net Zero Energy House) COMPARISON

Yamato Housing's Zero Energy House

ZEH (Net Zero Energy House)’s performance PERFORMANCE

Double insulation both inside and outside of the walls and roofs. It is a high-performance house that was scientifically calculated.

A balanced room with no cold or warm air

ENEGE’s heat insulation

ENEGE’s double insulation (wall), roof insulation, and foundation insulation
By installing the insulation in both inside and outside; this construction method helps to increase the insulation efficiency further. Also, the insulation of the walls and roofs keep the entire house at a comfortable temperature.

  • Health improvement
  • Energy saving
  • Comfort
Condensation prevention Glass layer thickness 31 mm (open window)

Triple resin sash

Insulation effect about 4 times compared to aluminum sash

The high-performance resin sash used by "ENEGE UW" has resin sash and triple glass (heat-insulated Low-E + argon gas filled) that prevents the intense sunlight of summer; the cold of the winter and condensation are shut out completely.

High airtightness・high heat insulation Great savings on air conditioning
Condensation prevention Shut out mold and ticks
Airtight ・ Watertight Prevent the intrusion of wind and dust
Soundproofing Soundproofing effect can block completely the outside noise
Housing standard of Ⅲ・Ⅳ Gap area 5.0 ㎠ “ENEGE” Clearance area 1.0 ㎠

Airtight performance less than 1.0 (㎠/㎡)

The smaller the C value, the smaller the gaps, the higher the airtight the house is.

It represents the gap area of the building per meter square.
Because airtight performance is the most important one, even after revising energy-saving standards, "ENEGE" is stuck with C value less than 1.0 ㎠/㎡. No matter how insulated the building is, if there are many gaps in the building, even in a room with comfortable air conditioner, temperature and heat will be lost immediately, and its performance cannot be utilized.

YAMATO JYUKEN, INC reaches Japan's top-class standard "HEAT 20" G2 standard - Cleared!!

Zero Energy House, UA value

※HEAT20⇒Investigation committee of Hyper Enhanced insulation and Advanced Technique for 2020 houses

※Coverage average heat transmission coefficient [W / UA value(㎡・K)]

※The performance standard value of housing is decided by dividing the Japanese archipelago (islands)into different regions. For example, 1〜2 areas (formerly I area) are Hokkaido,
3 areas (old II area) are Aomori, Iwate, and Akita. Even within the same prefecture, regional divisions may differ in municipalities.

Image of ZEH (Net Zero Energy House) IMAGE



  • Friendly with household finance

    Household consumption energy income & expenditure is zero! Therefore, there are no household utility costs! Living in a High airtightness ・ High heat insulation house, you can expect a further income of +α.

  • Health improvement effect

    Living in a high heat insulation house is known to result in health improvements such as the prevention of asthma, cold of hands and feet, and atopic dermatitis.

  • Environmentally friendly

    Reducing energy consumption in homes and using natural energy, solar power, for example, contributes to the reduction of CO2, global warming prevention, and the global environment such as environmental destruction.