Frequently Asked Questions

Is it not healthier to open a window?

A ventilation system supplies just the right amount of fresh air to a building in a controlled manner. The antimicrobial inner pipe surface and the air filter mean health concerns are unfounded. There are also other advantages, such as the avoidance of draughts, dehumidification and reduction of noise from outside. These all boost the feel-good factor within one's own four walls.

What running costs does a ground-air heat exchanger entail?

Ground-air heat exchanger running costs are minimal. The small amount of power used by the fan and the costs of regularly checking or replacing the air filter are the only running costs.

How often does the filter need cleaning?

The filter should be cleaned or replaced every 6-12 months, depending on filter class and on local environmental conditions.

What is a ball siphon?

When outside air cools in the ground-air heat exchanger pipes during the summer months, condensation forms. If this needs to be discharged through the drains of the building, it is directed to a siphon so that odours are avoided. As, with standard siphons, odours are prevented by the water standing in the pipe, there is always the danger of the siphon "drying out" and bad air entering the ventilation system from the drains. The ball siphon, with its integrated ball valve, prevents undesirable odours from accessing the ground to air heat exchanger pipes from the drains.

How does the antimicrobial inner layer work?

Particles of silver that are physiologically non-toxic are incorporated into the inner layer of the pipe by a special process. The antimicrobial properties of silver significantly reduce microbial growth on the inside of the pipe.

How long does the antimicrobial effect last?

The antimicrobial effect lasts as long as the pipe. No layer of dirt can be expected to form on the inside of the pipe as the air is filtered at the inlet. Occasional rinsing of the pipes will make them continue to function for many years.

How are AWADUKT Thermo pipes laid?

AWADUKT Thermo pipes are laid in the same way as drains. The only difference is that there are no special regulations for filling the trench. It is best to fill with solid earth rather than with sand, as sand conducts heat less efficiently than earth (e.g. clay). The pipes should fall 2% in direction of flow. The condensation discharge branch or collection shaft is therefore to be located at the lowest point.

What are the important differences between a standard PVC drainpipe and AWADUKT Thermo ground-air heat exchanger pipes made of special PP?

AWADUKT Thermo pipes have been specially designed for use in ground-air heat exchanger systems: