don't know. I live south so all we have are ceiling registers. cold air will fall when pumped out. a/c or heat pump are usually located outside and/or in attic.
and pretty much everything here is built slab on grade. any residence with a crawl space is typically a trailer home. any home with a basement is either : rich home owner, built into the side of a hill, or old farm house.
only asking because we are thinking of retiring some place with mountains and winter wonderland and I'm interested in building technique for optimal efficiency
our downstairs unit is floor level but with ceiling registers. our upstairs unit is ceiling at top of stairs landing but there are no registers in that area, only in the bedrooms.
we had Pergo for years in our dining room, great stuff.....until we got a pinhole water leak in the water supply line to the refrigerator. leaked under the wall, drawn by gravity across concrete slab, that caused some mold to grow underneath and there was no way to recover since it was all glued together so had to rip it all up 🤬
we had the foam cushion with plastic sheet which made it more cushioned but walking on it with hard soled shoes was like knocking on the front door. but it stood up to the cats claws chasing each other around the corner at speed, not a scratch on the floor in 10+ years!
By register you're referring to HVAC outlet? If so then yes, floor registers are the norm in my world which is not predominantly hot like your realm. Where I am AC use starts in June and goes through September. The rest of the year is heat, so makes sense to pump it out the floor. My house was built in 1999, so a version or 2 of code updates have since dropped. If you're gonna do a new build, it'll surpass what I have for sure.
My coworker did Pergo and spoke highly of it. This stuff looks to be Uniline. We're doing the floor and repainting the first floor because we're gonna try and sell the house before the recession they've been calling for the last 3 years hits. We'll have our finger tightly on the pulse of the market going forward. Current projections are favorable for the Spring. The crystal ball doesn't go past that and stuff could change between now and then. One thing seems certain: my house won't be worth more in 12 months than it is now. Were I planning to stay a few more years I wouldn't blink an eye, but we'd be trying to move at what looks to be the bottom so acting pre-emptively here.
After seeing the mold that the water heater failure generated and the rot from the linoleum separating from the sub subfloor I'm inclined to rocking sub subfloors in the bathrooms on the new build. Let that upper layer take the rot and damage and preserve the real subfloor as it did on this house.
Today I plugged about a jillion nail holes, plugged the bolt holes from the TV wall mount V1 and V2, revisited some multiple iterations of curtain rod holes, filled in a corner crack at the sliding door, ignored pantry door wall damage, etc. This place is gonna be spiffy when we're done, then hand it off to some other dbag to enjoy. I'm glad I get the practice but gonna be a bit jealous of what the new owner gets to enjoy.