DN200 underground duct for air-cooled earth-air heat exchanger - HELIOS

LEWT-E HELIOS underground sleeve for Canadian well

This geothermal collector, used for Canadian or Provençal wells, is made of food-grade polyethylene. It does not release any solvents or other volatile organic compounds (VOCs).

Reference 93936 = 25 meters

Reference 83632 = 50 meters

• Maximum airflow : 300 m³/h
• Structure : corrugated on the outside and smooth on the inside, facilitating installation and cleaning, and optimizing airflow.
• Design : specifically designed to be buried, conforming to the SN 6 standard according to EN ISO 9969, guaranteeing high pressure resistance and exceptional durability.
• Compliance : Meets DIN-EN 50086-2-4 and DIN EN 1610: 1997 standards, ensuring a safe and durable installation.

Installation of the geothermal collector (duct)

• Sand bed : the collector must be installed on a compacted sand bed with a minimum thickness of 10 cm, with a normal Proctor density of 95%.
• Covering : cover the collector with 0-4 mm compacted sand to a thickness of 20 to 30 cm, ensuring good stability and preventing subsidence.
• Depth : Ideally, install at a depth greater than 1.20 m for increased efficiency. The greater the depth, the better the thermal efficiency.
• Length for a detached house : allow a total collector length of at least 40 m. The collector can be installed in a single length or in two parallel lengths connected by tees at each end, respecting a minimum distance of 1 m between the collectors and the masonry elements.
• Backfilling conditions : the backfilling material must conform to specifications B1 or B4 as well as A1 and A4 according to ATV A 127, paragraphs 6.2 and 5.2.

For a detached house, allow a total collector length of at least 40m. The collector can be installed in a single length or in 2 parallel lengths connected by tees at each end.

Helios recommendations for this well duct

• Site preparation : Before installation, check for any damage to the pipes. Take measures to prevent stagnant water on the work site.
• Installation conditions : to avoid damage, install the collector during frost-free periods and unroll the tube 24 hours before installation.
• Watertightness : Ensure the watertightness of the connections by using the supplied sealing gaskets, with IP 67 protection. Note that the wall penetration is not watertight against rising groundwater.
• Cleaning and maintenance : Clean the geothermal collector regularly for hygienic reasons.