ᐅ New Construction as a KfW-55 House: Which Ventilation System to Choose?
Created on: 24 Oct 2013 12:19
M
Mycraft
My experience with ventilation systems:
There is no such thing as a good or bad one... every well-known manufacturer offers roughly the same performance. Ultimately, it comes down to the price and additional features like remote control, enthalpy recovery, bus connectivity, different numbers of pre-programmed ventilation levels, and so on.
What you actually need depends on your own decision... all ventilators perform equally well when it comes to ventilation...
There is no such thing as a good or bad one... every well-known manufacturer offers roughly the same performance. Ultimately, it comes down to the price and additional features like remote control, enthalpy recovery, bus connectivity, different numbers of pre-programmed ventilation levels, and so on.
What you actually need depends on your own decision... all ventilators perform equally well when it comes to ventilation...
During the selection process for the system in our house, I had contact with homeowners and visited houses with various systems, including Pluggit, Helios, Zehnder, Vallox, Wolf, etc.
Both central and decentralized solutions.
The core of every central system (apart from the heat exchanger) are the two fans and their control. However, there is little noticeable difference here regardless of the manufacturer: one pushes air in, the other pushes it out; the noise level is comparable. The differences between the systems lie mainly in the additional features. To put it mildly, the core components are basically the same across the board, whether Pluggit, Helios, Zehnder, Vallox, or Wolf.
Both central and decentralized solutions.
The core of every central system (apart from the heat exchanger) are the two fans and their control. However, there is little noticeable difference here regardless of the manufacturer: one pushes air in, the other pushes it out; the noise level is comparable. The differences between the systems lie mainly in the additional features. To put it mildly, the core components are basically the same across the board, whether Pluggit, Helios, Zehnder, Vallox, or Wolf.
Hello Cathy
Three years ago, we built a house of similar size and design.
We use a Paul Thermos 300DC ventilation system with constant volume flow control (necessary because of a room-air-independent wood stove) and fresh air intake through a ground heat exchanger (30m (98 feet) DN200 pipe buried underground).
Additionally, we heat via the ventilation system, with a hot water heating coil installed in the supply air.
We are very satisfied with the unit; it operates without issues. Thanks to the counterflow heat exchanger, it has a high efficiency. Together with the ground heat exchanger, the efficiency is usually so good that the device shows almost no difference between supply and exhaust air temperature.
The basement is within the insulated building envelope and has appropriate perimeter insulation. It is also ventilated and partly heated (office). In areas that are not heated, I have currently closed the ventilation valves.
The basement room with the solar storage tank also serves as our laundry drying area, so there is a supply air valve here.
I consider it important to ventilate the basement if part of it is used as living space. The few pipes and valves cost very little, and retrofitting later is usually difficult.
I highly recommend using a pocket filter in every exhaust air valve. They get clogged after a year. This measure also protects the more expensive main filter inside the unit. You can easily make pocket filters yourself from an EU4 filter mat at very low cost.
Personally, I don’t put much faith in all the manual measuring and balancing. The expert knows: “who measures measures wrong!” Valves get clogged over time, and the initially determined values no longer apply anyway.
In my system, the constant volume flow control ensures the balance between incoming and outgoing air is always maintained.
Good luck!
Bernd
Three years ago, we built a house of similar size and design.
We use a Paul Thermos 300DC ventilation system with constant volume flow control (necessary because of a room-air-independent wood stove) and fresh air intake through a ground heat exchanger (30m (98 feet) DN200 pipe buried underground).
Additionally, we heat via the ventilation system, with a hot water heating coil installed in the supply air.
We are very satisfied with the unit; it operates without issues. Thanks to the counterflow heat exchanger, it has a high efficiency. Together with the ground heat exchanger, the efficiency is usually so good that the device shows almost no difference between supply and exhaust air temperature.
The basement is within the insulated building envelope and has appropriate perimeter insulation. It is also ventilated and partly heated (office). In areas that are not heated, I have currently closed the ventilation valves.
The basement room with the solar storage tank also serves as our laundry drying area, so there is a supply air valve here.
I consider it important to ventilate the basement if part of it is used as living space. The few pipes and valves cost very little, and retrofitting later is usually difficult.
I highly recommend using a pocket filter in every exhaust air valve. They get clogged after a year. This measure also protects the more expensive main filter inside the unit. You can easily make pocket filters yourself from an EU4 filter mat at very low cost.
Personally, I don’t put much faith in all the manual measuring and balancing. The expert knows: “who measures measures wrong!” Valves get clogged over time, and the initially determined values no longer apply anyway.
In my system, the constant volume flow control ensures the balance between incoming and outgoing air is always maintained.
Good luck!
Bernd
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