A wall construction formed of solid wood members. The wall construction provides for a heating and cooling system that synergistically works with the inherent insulative properties of solid wood members. The wall construction comprises channels formed in the solid wood members to accommodate conduits for heating and cooling. The conduits are routed through multiple solid wood members of a wall and are positioned to efficiently heat and cool the interior of a building. Other grooves may be formed in the top side of the solid wood members to accommodate conduits for heating, cooling electrical service and communications carriers.