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Athur Dent1 Nov 2013 19:26Hello, we are currently building a house with a main apartment (160 sqm (1,722 sq ft)) and a secondary apartment (70 sqm (753 sq ft)).
A ventilation system with heat recovery is planned. The architect wants to design two separate systems, but the heating engineer says that one large system is also feasible.
My questions:
Thanks in advance for your answers.
Best regards, Arthur
A ventilation system with heat recovery is planned. The architect wants to design two separate systems, but the heating engineer says that one large system is also feasible.
My questions:
- What are the advantages of having two separate systems?
- How would a large system be billed between the two living units? I would allocate the ongoing costs based on the proportion of living space. But can the heat recovery be taken into account? Does it make a difference cost-wise at all?
- What happens if one household goes on vacation and does not heat? Would the other apartment then be unnecessarily cooled by the cold extracted air?
Thanks in advance for your answers.
Best regards, Arthur
1. No sound transmission between units, full cost control, very simple management. Questions 2 and 3 are therefore unnecessary.
2. Difficult to manage, unclear costs, heat recovery negligible.
3. Not a problem at all... because the air exchange is not high enough to matter... plus, the other unit still needs to be maintained at a certain temperature... dew point!
2. Difficult to manage, unclear costs, heat recovery negligible.
3. Not a problem at all... because the air exchange is not high enough to matter... plus, the other unit still needs to be maintained at a certain temperature... dew point!
Hello,
Regarding a defect-free construction project, the architect is correct. DIN 1946-6 applies to individual residential units. Two apartments require two controlled residential ventilation systems that must operate independently of each other.
In theory, this could also be achieved with one large system, but only with disproportionately complex control technology. The system would become significantly more expensive. I doubt that the heating engineer has taken into account the required functional independence with his "large" system.
The room-specific air volumes have a considerable impact on the performance balance, especially in well to very well insulated buildings. It is not without reason that, in heating load calculations, the room-specific air volumes must be taken into account according to the air volume plan per DIN 1946-6.
Therefore, be sure to remember the commissioning report after installation!
An alternative solution would be: main apartment => central controlled residential ventilation, secondary apartment => decentralized individual solutions.
Regards.
Athur Dent schrieb:
..... The architect wants to design two separate systems, while the heating engineer says that one large system is also feasible....
Regarding a defect-free construction project, the architect is correct. DIN 1946-6 applies to individual residential units. Two apartments require two controlled residential ventilation systems that must operate independently of each other.
In theory, this could also be achieved with one large system, but only with disproportionately complex control technology. The system would become significantly more expensive. I doubt that the heating engineer has taken into account the required functional independence with his "large" system.
The room-specific air volumes have a considerable impact on the performance balance, especially in well to very well insulated buildings. It is not without reason that, in heating load calculations, the room-specific air volumes must be taken into account according to the air volume plan per DIN 1946-6.
Therefore, be sure to remember the commissioning report after installation!
An alternative solution would be: main apartment => central controlled residential ventilation, secondary apartment => decentralized individual solutions.
Regards.
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