Radiant heat. The most comfortable homes I have ever been in during cold weather were radiant heat homes.
How to install Radiant Heat in Floors at The Home Depot
Install Heated Flooring for Less than What You’d Expect! Bathroom Remodeling Blog
Choosing the right in floor heat
In floor heating applied between the floor joists under subfloor.
Wood look tile installation, pros/cons, etc
Construction: radiant heat, water system most efficient; in walls and under ceramic tile floors (Energy.gov)
Radiant heated floor diagram. For sure I will be having radiant heated floors in my forever home.
Radiant barrier, attic insulation
Radiant in-floor heat! Why it is so efficient. #homeideas #construction http://livedan330.com/2014/12/23/hydronic-floor-heating-systems-effective-energy-efficient/