To answer this question:

> Can I heat-treat wood in a similar manner to the quoted paper and get
> the results I want (resistance to rot), with none of the downsides mentioned in the same
> paper?

The short answer is, no.

For you purpose there isn't much benefit, even if it _would_ work (which it will not) because much of the benefit of using wood for a chair was reduced. Most of the strength was reduced, and especially the elasticity. There was a gain in compression strength that you didn't need in the first place. (A chair will only see so much compression testing from a human sitting in it. Elasticity and resistance to racking are way more important for furniture like this.)

As for the rot-resistance, I remain unconvinced. It reduced some fungal attacks, probably by removing or converting the only part of the wood that fungus likes to eat. Basically, it did the job the fungus wanted to do, just quicker?

But what about all the other things in the world that want to eat wood? Fungus is only one aspect of what we call "rot". A good part of wood breakdown is simply exposure to elements that cause the wood to move away from glue and fasteners, and UV light breaking down the connections in the wood itself. Insects like ants and wasps would still be interested in making paper from your furniture, if they get the chance.

The authors make this very clear:

> Although heat treatment is an effective modification method to 
> improve  the  dimensional  stability and resistance  against fungal 
> attack there are undesired side effects, mainly due to the high
> temperatures involved (150–280◦C). Reductions of mechanical properties
> of wood were noticed after heat treatment, e.g. the resistance to
> shock, modulus of elasticity (MOE), bending strength (MOR), compressive
> resistance, shear strength, and abrasion resistance.

However, more to the point, this process does not allow the carbon in the wood to easily combine with oxygen (which carbon really wants to do). So in your oxygen-rich oven all you would be making is really, really slow charcoal. You would not get the purported advantages of whatever mechanical or chemical process is going on at low-heat low-oxygen environments.

So, to recap:

1. You can't really reproduce what they are doing in this paper.
1. Even if you could, you don't get any real advantage in doing so.