The Belgian demo site consists of a wood based envelope house aiming at demonstrating the construction of passive house. It is located in Stambruges, 24 km from the city of Mons, in Belgium. The key design strategies are a wood based structure, large insulation, efficient glazing and passive house concept. The house might be further developed to be a positive energy house thanks to the placement of photovoltaic panels. The energy performance of the building is determined based on a complete measurement system with data acquisition and treatment.
Demo site team: FD2, UMONS
Architect studio Format D2 (FD2) is specialized in building very low energy and passive buildings. The University of Mons (UMONS) contributes to the building monitoring. In addition, 22 companies have participated in the construction in order to have the best quality and cost.
Schedule: The construction started in February 2015 and finished in November 2015. The building monitoring started in December 2015, when occupants arrived.
- Structure and insulation: Prefabricated structure (building elements of the wood structure) with screw connection. Cross laminated timber of 5 layers of 2 cm. Wall, roof and ground with U < 0,1 W/m2K.
- Walls: The external walls are insulated with PIR 22 cm (2×11), wooden panels and 30 cm of EPS with plaster. They remain in place as exterior finishing of wood siding and colorful fiber plates.
- Roof. 22cm polyurethane. Insulation placed the interior side in order to have small thickness of overtaking of the roof, which provides a very good and continuous vapor barrier in the inner part.
- Ground: 24 cm polyurethane
- Windows: Triple glazing with Ug = 0.5 W/m2K and Uf < 0.9 W/m2K respectively
- Heating: Low energy wood fire (3-6 kw) with accumulation in 96kg of stones. This fire is airtight and totally mechanically automatic.
- Ventilation: Controlled mechanical ventilation with heat recovery system: double-flow heat exchanger with 89% of efficiency. The ventilation unit with fine electrostatic filtration and preheating to prevent freezing of the unit. The electrostatic filter creates a field of ozone that combined with a distribution of negative ions gives a bactericidal effect in the metallic pipe of the air distribution.
- Domestic Hot Water: Heat Pump air/water of 300 liters for hot water with possibility to connect with thermal solar panels (COP 3.4 (15º/51º C)
- Lighting: Low energy light systems, all class A and LED
- Rain water pump: The rain-water in stocked in a concrete tank of 10.000 liters placed in the ground in the garden. The alimentation in the house is for toilets, washing machine and outside tap.
- Renewable Energy sources: 100 m2 of photovoltaic panels are planned to be installed.
- Monitoring equipment: The house is monitoring with 6 electric meters with Mbus technology and 1 calorimeter for hot water. The energy from the DHW storage tank is measured with an ultrasonic heat meter. Meters to measure electricity consumption of various circuits and collects real-time information. Temperature and humidity are measured in the different living areas using Zigbee sensors to monitor comfort, acting as routers to increase the range of the transmission in case of interference because of the thickness of the walls. A sensor of humidity is placed between the wooden wall and the insulation with plaster to verify the no-condensation