Infrared heaters take the “ice” cold feeling in your home office. Even one infrared panel mounted in your office will take the chill out of your work area. Use a programmable thermostat to warm it up even before you’ve had your first cup of coffee.
Use a plug-in option, an easy DIY add, or they can be hardwired as well.
Add an under-desk heater, they work great to keep your feet warm for two cents/hour!