In article , Al N writes
Getting zoning right can be tricky, you may find that keeping the house heating on low and topping up the home office with a small electric convector is the most cost effective.
No harm in doing your own research and becoming your own local expert :-). I am self taught in this area but from a technical background so picked up the principles quite quickly.
Once you have got yourself up to speed on concepts (an old fashioned paper book on C/H design from the library may be best there), start designing your own system, post here for comment and see what people think.