Possibly, the one thing I actually don't judge influencers for is heating. I am always cold, my ideal temperature is 25+ degree Celsius and also in our current place everything is electric, we do not have gas here, our bill is pretty high anyway so a few extra quid a month to feel comfortable is not gonna break the bank. We both hate layering up clothes so we keep the temperature between 20 and 22 degrees in the kitchen/lounge area (our bedroom is cooler because you get more restful sleep in a cooler room).
Temperature is such a personal thing, some people are hot at 18 degrees, some people are cold at 25 - can't be helped! If you can afford to have the heating on, go for it.
Also, I don't think they have the heating on that much, G is usually wearing trousers and a knit/shirt. She just doesn't like to get dressed!