With the Vatican going solar and the Popemobile potentially going electric, it makes sense that Benedictine nuns have also started investing in energy efficiency. The nuns of the Conventus of Our Lady of Consolation have just moved into their new home — a 4.7 million pound ($7.4 million) eco-convent in England’s North York Moors national park.

According to the Guardian (via Inhabitat), the new building is constructed from local materials and features solar-powered hot water heaters, a green roof covered in sedums to attract animals and regulate the building’s temperature, a wood-chip boiler and a rainwater collection system to flush the toilets. If such eco-amenities seem too standard, the reedbed sewage system is sure to impress: Outgoing sewage from the monastery filters through a reedbed where it’s processed by anaerobic digestion and flows into the ground.

The nuns had occupied their former home, the lovely yet inefficient Victorian Stanbrook Abbey, for 171 years.