building a rocket mass heater

I just saw a video on the building of a rocket stove from wood. Just wanted to know how it works and how i can implement it into my trailer. It currently has a pellet stove, but i would like to replace it with a rocket stove. I am renting so it would have to look nice in order for the landlord to agree...thanks

You really need to build one outside first to get some experience. There are many posts on the forum detailing how they work, but perhaps it's best to start with the book from www.rocketstoves.com