ᐅ Integrating Cooling into Mechanical Ventilation with Heat Recovery or Using a Separate Air Conditioning System?
Created on: 9 Oct 2018 22:13
J
junge_familie
Hello everyone,
In our future house, the two children will have their rooms under the roof. From experience, I know that it gets extremely hot there in the summer.
We want to integrate a possibility for active cooling into our house. We have already had a conversation with an HVAC technician who, based on the size of the rooms, proposed an air conditioning system with a cooling capacity of about 13 kW. The cost would be around 15,000 €.
There is also a cooling element from Zehnder (ComfoCool Q600 ST), which is significantly cheaper but only has a cooling capacity of 2.3 kW. The technician estimated that his system could lower the temperature by up to 10°C (18°F). The Zehnder unit, however, has only about 20% of that capacity. Would it even make a difference? If 20% cooling capacity means it can only cool about 2°C (4°F) down, isn’t it basically useless?
Honestly, I find it quite strange that mechanical ventilation systems with heat recovery usually don’t include proper cooling units. Until recently, I thought nearly all these systems could also cool.
Thanks for your feedback,
junge_familie
In our future house, the two children will have their rooms under the roof. From experience, I know that it gets extremely hot there in the summer.
We want to integrate a possibility for active cooling into our house. We have already had a conversation with an HVAC technician who, based on the size of the rooms, proposed an air conditioning system with a cooling capacity of about 13 kW. The cost would be around 15,000 €.
There is also a cooling element from Zehnder (ComfoCool Q600 ST), which is significantly cheaper but only has a cooling capacity of 2.3 kW. The technician estimated that his system could lower the temperature by up to 10°C (18°F). The Zehnder unit, however, has only about 20% of that capacity. Would it even make a difference? If 20% cooling capacity means it can only cool about 2°C (4°F) down, isn’t it basically useless?
- Has anyone here used this unit?
- Should we install an air conditioner in addition to the mechanical ventilation system with heat recovery?
Honestly, I find it quite strange that mechanical ventilation systems with heat recovery usually don’t include proper cooling units. Until recently, I thought nearly all these systems could also cool.
Thanks for your feedback,
junge_familie
Alex85 schrieb:
@Zaba12 just google the products. It’s about active precooling, not passive systems in the ground. But as Tentakel also pointed out, only from the 600 model upwards, and that already produces quite a bit of airflow. Hmm... so what do I need the ground heat exchanger and the 30m (100 ft) PVC piping for then? Is the airflow just “cooled” by the ground in summer without the cooling device? The setup for winter is clear to me!
Zaba12 schrieb:
Hmm... so what do I need the geothermal heat exchanger and the 30m (100 ft) PVC piping for then? Will only the airflow be "cooled" by the earth in summer without the cooling device? For winter, I understand the setup clearly!Your geothermal heat exchanger works passively and also provides slight preheating in winter. It’s simply a completely different system.