I would tell you that I've been using my 26er on my wooden deck for years and years and years without an issue. I would also tell you that I've left it running with the SnS to run errands many, many times. Again with no issue. In fact, I would tell you that I will likely do it again, soon, without giving it a second thought. But, if I told you all that, and something bad happened, I'd really, really feel bad ! ! !
So, I would listen to all these other guys and play it safe.
BD