What sort of system?
Gas heat? Heat pump? Electric heat? Chilled or hot water loop? DX cooling with a hot water coil. Lots of possibilities unless you narrow it down for us.
“I am for doing good to the poor, but...I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it. I observed...that the more public provisions were made for the poor, the less they provided for themselves, and of course became poorer. And, on the contrary, the less was done for them, the more they did for themselves, and became richer.”
― Benjamin Franklin