From the Arborus Efficiency Journal:
The GHG impact from building heating can be easily reduced by close to 90% through better building design and the use of low carbon energy in off-peak hours from the electricity grid. In order to capitalize on this low carbon energy, the use of thermal energy storage is required. The proposed strategy utilizes water/mass storage in combination with the building mass to serve day-time heating needs ...
The best energy saving strategies offer multiple benefits that go beyond energy savings and GHG reductions. Designing a building for low carbon heating offers significant benefits, including improved occupant comfort and satisfaction, better indoor air quality, and a corresponding potential for decreased absenteeism and higher productivity. These additional benefits deliver human health and financial benefits that go well beyond those realized by energy cost savings.