Venting mod con (Bosch Greenstar) through unconditioned space before terminating outside

Ross_24 · February 2016

I cannot find any information on this. Does anyone know the requirements for running a vent from a basement into an unconditioned space (let's say a garage) and then out the garage side wall?

Is this possible? If so, are there any listed requirements for vent materials and insulation lengths for this specific situation?

Thanks guys!

njtommy · February 2016

I would insulate the exhaust and make sure the exhaust is pitched currectly to minimize any water laying in the piping.

Ross_24 · February 2016

njtommy said:
I would insulate the exhaust and make sure the exhaust is pitched currectly to minimize any water laying in the piping.

I agree. That's what we've done in the past.

I'm just surprised I cannot find any literature on this. Some guidelines for this situation would be helpful.

Ironman · February 2016

Here's a tech bulletin for venting the GB142 through an unconditioned space. I would think the same applies to the GreenStar.

http://www.bosch-climate.us/files/201001220052570.TBG-5_Guidelines_for_venting_through_an_unconditioned_space.pdf

Ross_24 · February 2016

Ironman said:
Here's a tech bulletin for venting the GB142 through an unconditioned space. I would think the same applies to the GreenStar.

http://www.bosch-climate.us/files/201001220052570.TBG-5_Guidelines_for_venting_through_an_unconditioned_space.pdf

Exactly what I was looking for. Thank you!

SWEI · February 2016

3 inch CTS insulation (3-1/8" ID) fits 3 inch Centrotherm perfectly.

Venting mod con (Bosch Greenstar) through unconditioned space before terminating outside

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