These things are very easy to replace. The hardest part is wrestling them around. Over the years I have replaced a few of them. The last time I bought a 13,500 from the scratch -n- dent section at PPL motorhomes. It's a Dometic and works like a champ. The frame on it has a good ding to it like the box was dropped. But, I saved a hunk of change so, who cares. Anyway, the physical size and weight of a 13,500 and a 15,000 is the same. I think they weigh about 80 pounds or so. Everyone I have done I did by myself but, the older I get the harder it gets. The last one was a challenge to get it up there without damaging anything. The wiring is super simple. The new seals are easy to set etc.. Just be sure to have a good surface to mount it too. That's all there is too it.