Some people say that is very important to have as part of your battle equipment the Vents. In my opinion this is not true and I say this because it will improve your tank only with 2.2 percent which is not good at all comparing to others pieces of equipment that can really make your tank more effective in battle. The main purpose to use the vents is to increase the crew's capacity by 5 percent which is not bad, but I prefer to focus on my tanks' statistics rather than on crew.
The Gun Rammer is the piece of equipment that anybody should use it as it will reduce the reloading speed by 10 percent which is more than enough to get you on the side of the winners. To make the perfect combination you should also use, if you afford, the Vertical Stabilizer which will increase your aiming time by decreasing the aiming circle. As a beginner if you have these 2 little pieces of equipment will make a big difference for your tank and for your winning statistics.
Another category of equipment that sometimes is as important as the Gun Rammer and Vertical Stabilizer are the Binoculars, Coated Optics and the Camouflage Net. Al of these 3 combined will give you a higher efficiency on what we use to call Vision Control. Carrying the Coated optics will help you if your main approach is as an active scout while the binoculars will help you on the less active scout or on the tanks which have a low view range. Coated optics adds as much as 10% to your view range. The binoculars adds even more, but you have to stay still with your tank before you can see the 25% increase on your view range of the binoculars.