There are many factors to be taken into account. Generaly, steam/air autoclaves are less effective. This does not mean that the item is not sterile, but the question that SAL can be realistically achieved. In any case smaller than a conventional vacuum cycle with steam. Why? The largest amount of energy is released when the steam is on the boundary conditions condenses . In this case, steam and air will deliver less energy than just steam. Secondly, what is the load? Is this worst case with filter and silicone hose or just basket and pistons and cylinders? And third, I am sure that you must perform empty chamber temperature mapping because if tha fan is not working propertly, you will have cold zones and distribution of steam and heat is not uniform. Distribution (mixing) of steam and air is very critical. If you dont have steam in your load and if you have hot air even at 121oC your cycle will be critical. I do not say that your load is not safe because regular bioburden is not termoresistant like B.stearothermophilus but your cycle 122 / 30 minutes is less effective than in regular autoclave that using just steam.