Identify the true statement about heat conduction in a wall if the air temperatures inside and outside the house remain constant. (Check all that apply.) Multiple select question. Heat transfer through the wall of the house can be modeled as steady and two-dimensional. A small thickness of the wall causes the temperature gradient in that direction to be large. A small thickness of the wall causes the temperature gradient in that direction to be small. Heat transfer through the wall of the house can be modeled as steady and one-dimensional.