Keeping the house warm
-Add glazing to windows
-Properly insulate your roof and if building new house try to avoid solid wall and build plasterboard wall so you can install insulation.
-Close door, this may sound obvious but usually the cheapest and easiest way to prevent heat loss in your home.
– Curtains and carpet, help with retaining warmth
-Ceiling Fans- this actually helps in keeping your house warm, as hot air rises, if you place the fans on low it will actually disperse the hot air around the room