The residential building is located in Borika, Ihtiman Municipality in Bulgaria. It is connected with an existing barn as part of the organic farming complex.

The use of natural materials is a priority in the project. The wooden construction is post and beams, with infill of the outer walls out of strawbales.
The energy efficiency of the house was approved by doubling the outer walls with a layer of adobe bricks on the inside.
The inner walls are adobe bricks with clay plaster,
which serves as thermal mass, regulating indoor thermal comfort, indoor air quality, and purification, which is also approved by the greenery
from the greenhouse, and the green zones in the domestic spaces.

A greenhouse extension of the house provides an opportunity for residents to grow herbs and spices for their household needs year-round. It also serves as a passive “heat pump”,
which in the winter time heats the fresh outdoor air supplied for ventilation, and in the summertime, by the convection, the heated and already used air is pumped out of the building.

The heating system that our team developed combines the heat produced by the wood-burning cooking stove, and thermal solar panels into an electrical boiler. From there the serpentines
are transmitting the heat, providing the hot water for the shower, the sinks, and the washing machine, as well as the amount of heat, needed for the underfloor heating.
The house has a system for rainwater harvesting, capable of supporting the function of the greenhouse and domestic water management annually.
Separating compost toilets minimizes the use of flushing water, and provides natural fertilizers for the windshield of the organic farm.
The electricity in the house is provided by the PV system, supported by a diesel generator in the technical room, so the house can function entirely as a self-sufficient (off-grid) unit.