Inauguration of the first positive energy house in the Center Val-de-Loire region

This achievement crystallizes the best of equipment and materials, especially in insulating masonry where it integrates the insulating concrete block CONFORT + 1.85 from ALKERN.

Driven by the desire to offer the best in design, interior comfort and energy saving, "Les Maisons de Loire", builder of custom-made detached houses in Loiret and Loir-et-Cher, chose ALKERN and CONFORT + 1.85 concrete blocks for the first positive energy house in the Center Val-de-Loire region. The aptly named “Maison Exempl'Air” with its 1 m186 of living space benefits from the high insulating properties of the selected materials of choice, which have earned it the EFFINERGIE BEPOS 2 certification and therefore produced more energy than it will consume. .

ALKERN COMFORT + chosen to equip the “Maison Exempl'Air” signed “Les Maisons de Loire”: a winning bet

Jérémy Gauteron, Managing Director of "Les Maisons de Loire," is delighted: "We quickly settled on Alkern's CONFORT+ insulating blocks because we were looking for a high-performance external thermal insulation solution without having to increase the wall thickness. Closely aligned with our tradespeople's usual practices, the CONFORT+ blocks have proven to be a wise choice, especially since we received excellent support from the Alkern teams."

The first positive energy house from the builder "Les Maisons de Loire", called "Maison Exempl'Air" combines performance and receives the 1 EFFINERGIE BEPOS certification. This individual house of 2013 m186 has the particularity of being able to produce more energy than 'she will have to consume it later.

A little math ...

The consumption of heating and hot water for the 186 m² living space is estimated at less than € 1,95 / day or € 712 / year. To which are added for lighting and ventilation auxiliaries: € 67 / year, i.e. an annual energy consumption of around € 780 which will be more than offset by € 1 / year from the resale of electricity generated by the panels photovoltaic solar panels installed on the roof. The total gain would be around € 855 per year!

The keys to this economic and ecological result lie in the successful alliance between high-performance and innovative materials, bioclimatic design and advanced technical equipment. This BEPOS level was achieved thanks in particular to:

• insulating masonry in CONFORT + insulating concrete signed ALKERN associated with SIS REVE by EFISOL, polyurethane foam board without HCFC or HFC. Proof of this is the thermal resistance of the walls, which displays an R of 6,20 m2.K / W over 34 cm in thickness. ALKERN's Confort + insulating concrete block in volcanic rock and PSEE makes this thermal performance possible thanks to an R of 1,85 m2.K / W and a thickness of 20 cm
• an ATLANTIC HYNEA hybrid boiler equipped with a patented PAC coaxial heat exchanger with COP up to 4,25 and a condensing gas heat exchanger with 109% efficiency ensures heating and DHW production (specific flow rate of 20 L / min)
• a low-temperature hot water heating floor allowing better inertia and optimal heat distribution
• an insulating entry door (Ud = 1,3) and ALU double glazed windows with thermal break 4-18-4
• low-consumption humidity controlled single flow controlled mechanical ventilation ALDES 2015-259-BAHIA Optima micro-watt ensures air renewal.
• 33 eligible RT2012 CLIPS'HOME® 250 photovoltaic solar collectors from CLIPSOL.

What offer an excellent level of insulation while preserving the living space!

An easy-going house

This BEPOS labeled house was built to be a pleasant and accessible house. The bio-climatic design requires a large glazed area to make the most of the solar contribution as natural lighting and heating.

Technical specifications Confort + from Alkern

• Dimensions: Width : 50 cm - Depth : 25 cm - Height : XNUMX cm
• Thickness: 20 cm
• Weight: 19kg
• Material: Volcanic rock and PSEE
• Coating classification: Support Rt2
• Quantity: 8 items per m²
• Region: Southeast Quarter
• Thermal resistance (R) = 1,85 m².K / W.
• Mechanical resistance fb = 5,9 MPa
• Acoustic attenuation with doubling PSEE = Rw + C = 57 dB and Rw + Ctr = 52 dB

Building on this success and listening to consumers' expectations, Maisons de Loire offers in its catalog 2 references of positive energy houses: CLEA and CLEO. The next one will be made with ALKERN CONFORT CITY concrete blocks. To be continued...