What fuel is available to you in your undisclosed location?
Is this forced-air, radiant hot water, steam ?
You gotta give us some clues here...
Lots of advances in all those areas lately so probably it will come down to total cost of the unit. MHO is that any 'total cost' computation involving price of fuel requires foreknowledge of commodities pricing. Good luck with that.
[ You joined a double-bass forum today to ask _that_ ? ]
__________________Club Hartke - #337 | Steinberger Synapse Clubb - #8 | Fretless - #886 | Darkglass - #77This old man, he plays 6...