Uhm.. for me it helps, and A LOT. Surely there are more factors involved, which I'm not aware of. I'm talking from Fortaleza, Brazil. Maybe the sea is bringing cooler air. I really don't know, I only have these pieces of empirical knowledge and my experience is very narrow, basically limited to this city.

A large body of water near by certainly has a moderating effect on temperature.

I looked up the climate data for Fortaleza, and compared it to my town (random US city, about 35 degrees northern latitude, so not super far south or anything.)

Our average daily highs in summer are only about 1 degree (C) lower than your RECORD highs... your averages are about 9C lower than ours.

Without AC here it would be...supremely unpleasant, and well other the threshold of danger for anyone with any sort of medical issues.

This is something that I don't think Europeans appreciate. Most of the USA is way hotter and way colder than most of Europe

Our air masses are probably cooler than yours because of the sea, I'm not sure. There seems to be more factors in operation.

It can, though has limits to how hot/wet it can help with - see figure [0] for Celcius and [1] for Farenheit which show the accepted climate-science approach mapping appropriate techniques for achieving comfort at various temperatures/humidity.

Ventilation is actually best for hot-wet climates where hot-dry climates (common through much of the US) are usually better dealt with through thermal-mass/thermal-lag as typically the nights are cold (in hot-wet usually the nights are hot).

[0] https://www.researchgate.net/profile/Kiyan-Vadoudi/publicati...

[1] https://leetammy.files.wordpress.com/2012/11/blue-psycho.jpg

Homes should include a central dehumidifier. I believe they’re more efficient than running the AC since there’s no net temperature change?

This depends on the climate zone you’re in. In drier climates, some HVAC systems are actually humidifiers which blow the outside dry/hot air through a wet membrane (ex., desiccant) and blow out wetter/cold air.

Yeah, I have a humidifier attached to my furnace and my house is still often dry enough to make every piece of furniture extremely staticky

Running a dehumidifier here in the summer would be cruel and unusual.

I am in New Mexico and am thinking about a central humidifier. It’s super dry and especially during the winter I have massive problems with dry skin.