A dome. The more insulated the better. A Monolithic Dome made of shotcrete will cost about a 1/3 as much to heat as a regular house. But, if that isn't your style then the most economical house to heat will be a steel frame house in brick or stone with double or triple glazed insulated windows and brand new weather stripping. In floor radiant heat or radiators will be a lot more efficient than a heat pump and you want to be certain that the attic is very well insulated. If there is a fireplace be sure to keep the damper closed and if there are ceiling fans be sure to leave them on year round. In the winter have them spin backwards if the draft bothers you. They will keep the air temperature more even which helps the thermostat out. Also, set the thermostat and leave it at the same temp. night and day for the whole season. Hope this helps!
"economical" has no comparative or superlative form. You would say "more economical" or "most economical."
The west side of a house gets the most afternoon heat assuming sunlight can reach this side.
in the light house
The most economical transportation in Spain is the bus system. Trains are also inexpensive.
The Gothic Style home.
the dining room
The most expensive hats are hand shaped in black leather, the most economical is tan suade
the bathroom maybe or the attic
eggs
toyota prius
The most economical way to build a greenhouse depends on the location. If the location already gets a lot of sun use it.
Sunil narine