Heating & Air Conditioning zone control was not even heard of back in the beginning of central heating and a/c.
When I particularly guess about things, I see that today all of us have such good technology in several areas of life. The main 1 being in the heating and a/c side of things. Back years ago when central heating and a/c first became affordable to the average joe, the power of the heating system and the a/c in them was nowhere near what it is today. They just did not have the technology at the time to make a central heating and a/c particularly be able to cool or heat a house to the perfect temperature making solid indoor temperature control. Having perfect indoor temperature control was not possible years ago and now it is. Also, for those with strangely built homes they have what is called zoned heating and a/cs. With these zoned heating and a/cs you can have unusual un-even temperatures in every room as if you had unusual central heat and a/c units, however it is all in the same. Heating & Air Conditioning zone control was not even heard of back in the beginning of central heating and a/c. So that is just a small prime example of what I am talking about in terms of having the most appealing heat and a/c technology today verses back when… You never would have been able to imagine today going back to yesterday. Especially with such things as smart thermostats. That concept wasn’t even conceived back then except maybe in some futuristic sci fi novel. Well folks, the future is now and here all of us are!