MODELHOUSE
Make your appointment here, for your free trial night!
We believed that to truly recommend the superior comfort of European-style high-performance homes to others, we needed to experience and verify it ourselves first. With this vision in mind, we decided to fully renovate an unused annex on our family’s property—which had been sitting vacant—into a ultra-high-performance home built to true European standards.
Naturally, we entrusted the thermal design and master carpentry to our Swiss master carpenter.
The project was a non-stop journey of try and error. Materials that are affordable and readily available in Switzerland turned out to be expensive in Japan, while others weren't imported at all. We even had to arrange special sea freight shipments directly from Switzerland to get the right components...
In the end, the completed home surpassed all our expectations. More importantly, the problem-solving knowledge and practical expertise we gained throughout this hands-on building process became an invaluable foundation for our future construction work.
We have now opened this building as an official Ecoplus Model House for anyone interested in high-performance construction or wanting to experience true European-grade indoor comfort for themselves.
Contact us anytime—we would be delighted to give you a personal tour!
Welcome to Our Small Model House at the Foot of Mt. Kosha in Nakano, Nagano!
This was our very first project.
Interested in seeing or staying over to feel the difference yourself? We welcome bookings for tours and overnight trial stays via Instagram, email, or phone!
Before
Classic 80s/90s Japanese Build: A standard house typical for its era in Japan.
Minimal Insulation & No Air Sealing: Unsealed envelope with negligible air barrier layer.
Unbearable Seasons: Scorching hot in summer, freezing cold in winter.
Poor Living Quality: Low thermal comfort and high utility bills.
HEAT20 G3 Standard: Thermal insulation performance with a Ua-value of 0.2W/m2\K or better!
High Airtightness & 24/7 ERV: Advanced heat recovery ventilation pairing with precision airtight sealing.
Maximum Energy Savings: No more sky-high heating and air conditioning bills!