Reply #16: Not necessarily. If the temp is kept stable the walls, floor and all the furnishings

[flamin lib]

are at a constant temp. If the house cools appreciably (or heats in the summer) those heat sinks contribute to the energy cost to return the house to a previous temperature. It may be beneficial to fluctuate the temp but any gain is mitigated by the heat sink factor.

What I mean is it isn't a linear thing and the gains are not as great as it might appear.