Hi, first time poster from Toronto, Canada. DIY'er looking for both facts and opinions... Just under 500 sq ft open concept one floor bachelor house. Super insulated on all 6 sides. Mini split heat pump does a great job heating if it's above -15C outside. For times when not, I'm putting carbon fiber infrared sheets under bamboo engineered floating floor. I recently heard I should have heat under each door and window. Then someone else said keep it all at least a foot away from the perimeter. Does it make sense to have 3 zones...? #1 would be only under the doors and windows, #2 would be living side and #3 kitchen/dining side. Check my "albums" for a rough plan pic. Thanks in advance for the enlightenment.