Thanks for the great model and congratulations on managing Blender.
(two things don't like me, touch screens and Blender [B-)] )

The resulting non-crashing render does have some texture or surface clipping issues (and I've noticed it on many other models from 3dWareHouse as well).
Probably you have already noticed that making 'material' (just above material 0 in Model materials list of Denon), material 12 and material 13 ...

Pan 3D-tool discussed in this thread might help.
Most recent version right now is 1.5 and can be found here.

@Daniels118
Thanks for great pan tool! I feel it very handy, especially when jumping constantly between SketchUp and SH3D.
With version 1.3.x my models easily escaped to infinity when using zoom. Version 1.5 has not this problem.
Hide obstacles help to create unique views not otherwise (at least ...

Looks really good! How about new rendering of kitchen too?

If you have not seen this guide yet, good point to start is Starting a new home.
All 8 main steps are explained in detail.

Seppo

Excellent solution, crackwood01 [=D>]
- uses only SH3D-tools AND
- avoid all problems I mentioned when creating window with SketchUp

This is the way I will make my windows!

You have solved problem with stove and unwanted triangle faces, great!
But I am bit stubborn person, so I want to show what I meant at first time.

https://www.mediafire.com/convkey/7724/6t3945br8na8bti6g.jpg

Triangles seen on left hotplate disappeared when two colors were made invisible.

https ...

I think my main problems are with some downloaded furniture models. Some faces render triangulated shading instead of flat plane,
I gues you already have modified materials of imported model so that unwanted materials hiding inside the model are made invisible?
If not, it's worth to try.
3D view ...

Rendering these windows might show unwanted colors/materials 'cladding_stucco_white' and 'material' bleeding through.
In this case use Modify furniture - Materials and make those materials invisible.
I have not found other solution to remove them.. sorry