Renovating my dwelling with current HVAC appliance

I am in the middle of a fairly huge dwelling renovation project.

And I am getting close to making it towards the end of it within the next month or so.

When I reach that point, the last step in this whole dwelling renovation project is to go out & buy a brand new, up-to-date & right on the money ideal & ever all powerful central heating & a/c appliance! That is the very last step in all this dwelling renovation I am doing. Because my old central heating & a/c appliance is genuinely just that, which is terribly old! I have had the central heating & a/c appliance for almost 20 years which is the standard end of the lifespan of a heat & a/c component unit. And trust me, my central heating & a/c appliance is starting to show signs of wear. Which is why it is genuinely pressing that getting a current & genuinely up-to-date central heating & a/c appliance is part of this entire dwelling renovation project of mine that I have been doing for the last 7 to 10 months! Yep, it is that detailed. When all is done & said, the current central heating & a/c component unit will be the icing on the cake. The last & final step to complete this entire project to make my entire dwelling seem absolutely current & genuinely up-to-date, just like the central heating & a/c appliance that I purchase will be!
Digital thermostat