Heating with a Heat pump or Gas is significantly cheaper, so if you look at the big picture, it’s not “free money”.

Open air heat pumps have a lower limit for their operating temperature, so can't be used efficiently in cold climates (around < 25F), since they start to use more energy than they provide as heat. Geothermal heat pumps solve this, but cost more.

Gas is somewhere around half the cost of electricity. Back in the day, you would still profit with a GPU.

Yes. That's one of the benefits.

Some people use electric heating even without crypto so using GPUs to mine crypto to get the same effect is a no brainer.

Problem is that during the summer you have to get rid of the excess heat, so you need air conditioning or perhaps open air cooling.

Not gonna lie, I've used my GPU to heat up my small room before.

It's not a "no brainer" if you include the cost of the GPUs. You need to do at least a little math to figure out whether it's actually cheaper that a simple resistive heater (or a heatpump).

Pretty sure that he was implying that if you already have a GPU then you should mine during the winter instead of using conventional heating.

That's how I read it at least.

> so you need air conditioning or perhaps open air cooling.

Or icebergs - Reyjavik is a popular place to build data-centres, so I have heard. They also have good geothermal in those parts.

Im no expert but coupled with solar panels you get more power during summer to run the AC

Check out this video on using the heat from computing beneficially.

https://www.youtube.com/watch?v=hNytmvltsWk