Hello,
this summer we are building a town villa with 135 m² (1453 sq ft) spread over two floors. On the roof (23° pitch), we are installing a solar system for domestic hot water heating, and I would like to know if it makes sense to have a ventilation system with heat recovery built and installed from the start.
I hear different opinions.
Some say that the exhaust air from the kitchen, including odors, will reach the bedroom, while others argue that such a system, costing between 12,000 and 15,000 euros, doesn’t make sense because it recovers very little energy and it’s better just to open a window for ventilation. What do you think?
I am grateful for any suggestions and tips.
this summer we are building a town villa with 135 m² (1453 sq ft) spread over two floors. On the roof (23° pitch), we are installing a solar system for domestic hot water heating, and I would like to know if it makes sense to have a ventilation system with heat recovery built and installed from the start.
I hear different opinions.
Some say that the exhaust air from the kitchen, including odors, will reach the bedroom, while others argue that such a system, costing between 12,000 and 15,000 euros, doesn’t make sense because it recovers very little energy and it’s better just to open a window for ventilation. What do you think?
I am grateful for any suggestions and tips.
Don’t worry. I didn’t take it the wrong way either.
We won’t really have any damage, more or less.
We are building with a prefab house manufacturer. After comparing all the offers and considering acquaintances’ experiences with the manufacturer, we decided to go with them.
A mechanical ventilation system with heat recovery is included as standard.
So, we would have had that with the manufacturer anyway.
We won’t really have any damage, more or less.
We are building with a prefab house manufacturer. After comparing all the offers and considering acquaintances’ experiences with the manufacturer, we decided to go with them.
A mechanical ventilation system with heat recovery is included as standard.
So, we would have had that with the manufacturer anyway.
Hi,
here is a brief list of pros and cons for controlled residential ventilation:
+ Constant fresh air
+ No need for manual airing (according to standards, about 12 times a day!). This means no clearing window sills, no drafts, etc.
+ Less dust, insects, and noise
+ Saves heating costs
- Costs around 10,000 euros
- Ongoing costs for electricity, filters, and maintenance
... I am sure I forgot a few pros and cons.
Personally, I want controlled ventilation not to save heating costs (which probably won’t be cost-effective), but for comfort! It is important to include it in the planning phase from the beginning and, as heard/read, to have it designed and installed by a professional company.
here is a brief list of pros and cons for controlled residential ventilation:
+ Constant fresh air
+ No need for manual airing (according to standards, about 12 times a day!). This means no clearing window sills, no drafts, etc.
+ Less dust, insects, and noise
+ Saves heating costs
- Costs around 10,000 euros
- Ongoing costs for electricity, filters, and maintenance
... I am sure I forgot a few pros and cons.
Personally, I want controlled ventilation not to save heating costs (which probably won’t be cost-effective), but for comfort! It is important to include it in the planning phase from the beginning and, as heard/read, to have it designed and installed by a professional company.
One should watch out for serious construction errors: I have seen many examples of poor workmanship in photos. For instance, uninsulated ventilation ducts were installed in the cold attic, which means that in winter, moisture drips from the exhaust vents on the ceiling. I also saw a photo where the exhaust and supply air vents on the roof were less than 5cm (2 inches) apart… meaning the system might be pulling the used air right back in.
So, hire a professional and inspect everything carefully.
So, hire a professional and inspect everything carefully.
Thanks for your tips. We have now also decided on heat recovery ventilation; prices will follow once we have planned everything in detail with the architect.
But normal heating isn’t really possible with that, right? What would you recommend as a supplement to the regular heating system?
We plan to install underfloor heating on both floors along with the heat recovery system. On the roof, we have a "small" solar system for domestic hot water preparation.
Which gas boiler would make sense to work efficiently with heat recovery? Or should we avoid a gas boiler altogether?
But normal heating isn’t really possible with that, right? What would you recommend as a supplement to the regular heating system?
We plan to install underfloor heating on both floors along with the heat recovery system. On the roof, we have a "small" solar system for domestic hot water preparation.
Which gas boiler would make sense to work efficiently with heat recovery? Or should we avoid a gas boiler altogether?
B
Bauexperte2 Apr 2012 10:51Hello,
That is not quite correct; with a passive house, it can definitely be sufficient.
As long as you stick to reputable brands, it doesn’t matter which supplier you choose. The only important point is not to oversize the boiler; in other words, select the boiler that matches your actual demand. There are differences in the output capacity of the various boilers.
You can also completely avoid using a gas or condensing boiler and opt for renewable energy instead. This saves the gas connection but depends on your budget and, again, your preferences.
Kind regards
eifohn schrieb:
But normal heating isn’t really possible with this, right?
That is not quite correct; with a passive house, it can definitely be sufficient.
eifohn schrieb:
We plan to equip both floors with underfloor heating and also have heat recovery. On the roof, we have a "small" solar system for domestic hot water preparation. Which gas boiler makes sense to work properly with heat recovery? Or maybe no gas boiler at all?!
As long as you stick to reputable brands, it doesn’t matter which supplier you choose. The only important point is not to oversize the boiler; in other words, select the boiler that matches your actual demand. There are differences in the output capacity of the various boilers.
You can also completely avoid using a gas or condensing boiler and opt for renewable energy instead. This saves the gas connection but depends on your budget and, again, your preferences.
Kind regards
Hello,
A mechanical ventilation system with heat recovery seems much more reasonable to me than a solar thermal system!
Best regards
eifohn schrieb:A lot has already been written on this topic. Just use the search function!
... what do you think? I am grateful for suggestions and tips
A mechanical ventilation system with heat recovery seems much more reasonable to me than a solar thermal system!
Best regards
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