Pros and cons on secundairy air inlet feed from outdoors

[skywalker]

Hi all,

I always learned that your stove consumes a lot of air from the room. Installing a tube that brings the air from outside into the stove saves a lot of cold air coming into the room.

But lately I heard that some stove builders dont recommend it. Can somebody explain why not?

Thanks for sharing

[peterberg]

I'd suggest you click the link below and read the article. There's a menu at the top left leading to related articles.
woodheat.org/the-outdoor-air-myth-exposed.html

Apart from that, I've had an outside air supply installed in our new passive house and kept fighting it during two winters. The third winter I was fed up with it and used the balanced ventilation to program one pre-set of three out of balance on purpose. In such a way that there would be a slight overpressure in the house, not large, just to compensate for the chimney draft. This solution is in its fourth season now no trouble at all since then, works 10 times out of 10.

A balanced ventilation system is not only extracting air, but also blows air in which is passed through a heat exchanger thereby extracting warmth from the outgoing air.

[peacebells]

Planning to build batchbox rocket stove in house that has heat recovery ventilation system installed. How much overpressuse should there be to compensate chimney. Is there anything else important to thinkg about.please help

[peterberg]

Hi Peacebells, welcome to the boards.

In my particular case, the output fan is running 5% slower than the input fan on all settings. The special setting I am using while the heater is running the difference is 10%, so the overpressure is slightly higher than the normally tuned value. This doesn't mean your house, ventilation system, climate and heater are the same as mine, far from it. You have to try for yourself what setting suits you best.