1.	General design
a.	Definition of cooling output of DX cooler in ARM and USE mode together with required air flow rates.
b.	Preliminary definition of number, size and location of supply grills in cold chamber and tambour.
2.	Analysis of thermal effects of people entry to the Igloo
a.	Calculation of air exchange between cold room and tambour when door is opened, and 2 persons are entering the cold room. Also, calculation of temperature rise in the cold room.
b.	Discussion of door shape or opening direction influence to reduction of air exchange. 
c.	Optimization of air distribution on each side of the door, to minimize temperature rise in cold room area.
3.	Analysis of temperature and air humidity evolution during Igloo operation
a.	Calculation of temperature steadying back to -30 °C after the door is closed and air flow sets to the USE mode, also taking into consideration influence of air entered from outer environment. 
b.	Analysis of possible improvement with ice sculptures placed freely standing in the cold room.
c.	Analysis of number of occupants impact (1 or 2 occupants) to behaviour of DX cooler and air circulation.
4.	Analysis of supply grills number and locations to decrease draft sensation of occupants.
a.	Definition of optimal air speed from air supply grills to prevent or at least minimize draft sensation.
b.	Analysis of air distribution in ARM mode (no occupants) and UCE mode (with occupants).
c.	Optimization of supply air direction and resulting air flow pattern in the cold room and tambour. In cold room specifically to minimize turbulence and draft in central area.
5.	Final design
a.	Final definition of cooling output of DX cooler and number, sizes and locations of supply and extract grills.
