system
Given the following post, respond as if you're commenting on Reddit:
human
[Dresden Files] Was Harry weakening his threshold by using his sub-basement as a lab?

I know that his apartment's threshold was weak for several reasons, such as being a bachelor and the fact that he only rented it instead of owning it, but was his lab a contributing factor?

It seems like the fact that he used a big part of his home for research and for his job would take away form the home-ness that a threshold represents. Victor Sells completely ruined his threshold by doing black magic and business out of his house. On the other hand, Michael apparently does some work out of an office in his house, and he has a Fort Knox of a threshold.
gpt
Michael has a lot of things going for him that Harry doesn't, not the least of which are a fiercely loving family, and a fiercely armed contingent of angelic guardians. Michael is a Family Man, and his house is Their Home ... possibly built with his own two hands.

Harry doesn't have a family, but he *does* separate work and home life; his detective agency is run from an office, not his basement. And his laboratory is very much an expression of who Harry is: he's a magic geek, and if (or when) left to his own devices, he'll tinker.

In *Death Masks*, Harry thought his threshold was strong enough to test if >!Susan was still human!<, and it slowed down the >!Toad Demon!< in *Storm Front*.

That being said, there are obviously issues with his wards and thresholds. For example, *someone* had to get in to (Small Favor) >!repair Little Chicago!<.