eQUEST (Quick Energy Simulation Tool) is a free building energy simulation tool that combines the power of the DOE-2 engine with graphical wizards and intuitive analysis modules.

Designed to be useful throughout all stages of architectural design —from initial concept to technical development— it enables the evaluation of energy-efficient technologies with reasonable effort and professional results.

What sets eQUEST apart is its balance between technical sophistication and accessibility. Thanks to its building creation and Energy Efficiency Measure (EEM) wizards, along with graphical visualisations, the software facilitates energy modelling without requiring expertise in simulation.

Additionally, it is qualified to calculate tax deductions for commercial buildings under US legislation, enhancing its practical value in real-world projects. Its active user community and educational resources make it a solid choice for designers, engineers, and consultants seeking to integrate energy criteria from the outset of a project.