I watched this show recently about extremely wealthy individuals & how they spend their money on their own properties! The best part was this gentleman that purchased a property in California that desired to have a secret tunnel to a hidden room that he could smoke his cigars in. His fiance & him didn’t want to be smoking throughout the entire lake property so he wanted a sealed-off room that would give him the opportunity to smoke separate from stinking up the rest of the property. The way he accomplished this was a quality Heating, Ventilation & A/C with a great deal of ventilation that allowed for 2-way transfer of heat & cool air. This allowed the smoke to flow out & cool air to flow in. It was a rather sophisticated Heating, Ventilation & A/C system & it totally works like a charm. He needed to have a lot of Heating, Ventilation & A/C ceiling as well as a completely sealed off door but after witnessing the results of his money & efforts it was inspirational & a legitimately marvelous sight to behold.