Very interested to hear perspectives from folks living in or working on renovated older homes in Mediterranean climates. And also from "experimentalist" types — if you've instrumented your home to measure its performance, you know who you are ...
With my wife and two kids, I've just bought a 100-year-old fixer-upper in the lovely East Bay (San Francisco Bay Area). I'm trained as an ambient air quality scientist, by the way, but this is my first home.
Among my primary concerns is the fact that it was previously owned (and lived in for ~40 years) by a smoker. Now, if I didn't think this could be handled, I wouldn't have bought the house. The third-hand smoke is concentrated, thankfully, in one or two rooms (and not the bedrooms). But i'm interested in ideas, and empirically tested techniques — both for my own home and for the large amount of SF Bay Area housing stock that's similarly burdened.
Apart from that specific issue, I suppose the IAQ + RHT issues would be pretty minimal. I expect the house now gets about, oh, maybe 50 ACH_50% hr-1. :-) I'm in favor of going combustion-free (e.g. heat pumps) but I don't know what combinations of approaches, in this mild climate, make the most sense for domestic hot water + heat + ventilation (no active A/C required). I'm still hoping to find more relevant case studies to learn from, whether that's through Google or through forums like this one!
Questions welcome anytime. Thanks for the time & attention to read this post.
All the best,