I was indeed thinking of running a PoS node for a new promising coin. I didn't know there were 'CPU only' mining possiblities.
The heat however is indeed something I have not considered. My laptop is not in use but I don't want to ruin it. It's a Dell M4700 with 16GB RAM. It is quite noisy so at least the fans do their work. But perhaps it's more profitable to simply sell the laptop and invest the money somewhere. Perhaps I can do that after a two week try out.
PoS is what I "mine" these days on my laptop - currently staking Neblio, Nullex, and Stashpay. NEBL is "anchoring" my assets while I experience with Nullex (troubled development and infighting resulting in an upcoming swap) and Stash (newly released blockchain - last week)
Staking is not taking a big toll on your hardware (apart from the SSD I suppose). Bear in mind though that in order for staking to be efficient, your laptop will need to be on 24/7. Which is why I wrote old laptop... as opposed to the one you're working with day in day out. But hey, that's all up to you.
Also bear in mind you can stake several coins simultaneously on one laptop/machine.
I'm staking BEAN, LINDA and VEIL on a small HTPC at home currently, works like a charm.