Planned ventilation concept for the chimney to utilize excess heat

2024-04-17 00:33:38

Has anyone already built a ventilation concept for a house with a fireplace to use the excess heat? Especially in new buildings with underfloor heating, the fireplace quickly produces far too much heat. Have you ever built a system to use the heat for the basement or the garage that directs the excess heat from the living room there?

2024-04-17 00:47:22

Why do you ask that as a heating engineer? Why should surplus heat be directed into the unheated basement or the garage? Heating ventilation concepts are better suited for living spaces, aren't they? For example, with heat recovery.

2024-04-22 23:27:17

Why are you asking that as a heating engineer? Why should surplus heat be directed into the unheated basement or the garage? Warming ventilation concepts are better placed in living areas, right? For example, with heat recovery.

Of course we install a ventilation system with heat recovery! But that does not change the fact that as soon as we use the fireplace because the fire is simply nice, we quickly have over 28 to 30 degrees in the living room and the rest of the house also has normal room temperature. However, the garage and the workshop basement can still absorb heat, for example when I can continue working on the vintage car. Here it definitely makes sense to channel warm air from the ceiling above the fireplace into the garage or basement and supply cooler air to the living room. I am well aware that this is somewhat of a luxury, but it still makes sense.

2024-04-23 08:53:10

Here it definitely makes sense to vent warm air from the ceiling above the fireplace and channel it into the garage or basement, while supplying cooler air to the living room.

Since warm air contains more moisture, you could potentially cause a mold problem in the cool basement and end up with 100% humidity; conversely, it dries out the living room air.
Not to mention the dust and dirt problem in warm air ducts.
In short, I wouldn't do it.

2024-04-23 10:13:54

Of course we are installing a ventilation system with heat recovery! But that doesn't change the fact that as soon as we use the fireplace, because the fire is simply beautiful, we quickly have over 28 to 30 degrees in the living room and the rest of the house also has normal room temperature. However, the garage and the workshop basement can definitely still absorb heat, for example when I can continue working on the vintage car again. It definitely makes sense here to exhaust warm air above the fireplace at the ceiling and direct it into the garage or basement, and supply cooler air to the living room. I am quite aware that this is somewhat of a luxury, but it still makes sense.

But then you have the heat when you actually don't need it. When do you heat the fireplace? Rather in the evening. And after that, you probably don't want to tinker on the vintage car anymore. By the next morning, the heat will probably be gone again. Don't heat the fireplace too much, then you'll only get a pleasant 25 degrees in the house in the evening. And put a small extra stove in the workshop.

2024-04-23 15:08:16

It makes sense to build the chimney very thick with fireclay bricks or something similar, so that all the heat is stored and slowly released into the room.

By the way, if it is only meant to look nice, an ethanol fireplace or even the 80-inch OLED will do.

My ex-brother-in-law had something like that in his granny flat (he connected the warm air duct from the main apartment's fireplace). Then everything on the wall was always black...

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Planned ventilation concept for the chimney to utilize excess heat

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