Reducing energy consumption and carbon emissions is firmly on the agenda. With the IES <VE> you can minimise the need for air conditioning in a building, or eliminate it altogether. The MacroFlo bulk air flow simulation software enables you to analyse the effectiveness of designs involving natural ventilation, so you can cut the cost to the environment, and to your client.
What MacroFlo does:
MacroFlo simulates air flow driven by wind pressure and buoyancy forces (and mechanical air movement if used in conjunction with ApacheHvac).
This capability allows you to carry out studies of natural ventilation, infiltration, façade analysis and mixed-mode design. Application areas include:
· Single-sided ventilation
· Cross-ventilation
· Whole-building ventilation strategies
· Chimneys
· Opening controls.
How MacroFlo works:
MacroFlo lets you assign opening properties to windows and doors using a simple and efficient editing process based on opening types.
Running in tandem with the thermal simulation program ApacheSim, MacroFlo uses a fast multi-zone thermo-fluid solver to simulate the interactions between air flows, pressures and thermal conditions.
Commercial Benefits
By helping you demonstrate how you can reduce the need for air conditioning – minimising energy consumption and carbon emissions – MacroFlo provides significant marketing differentiation and technical advantages.

