Here is my boiler I've been working on for the past few weeks. This is boiler of the future. Since I want to specialize in game design, I decided to make it low poly and rely heavily on normal maps.
Here is a finished Boiler room Mental Ray render:
This is just a point of view from a hallway.
Viewport screenshot shows wireframe.
And this is the old version, animated:
(I will update it with a recent render soon.)