The outdoor furnace will also heat the Solitude lodge bedroom annex, built by the end of 2004. The glycol loop will be extended, and a separate hot water loop will be established. Hot water/air heat exchangers will be used to provide hot air heating by convection. The hot water loop will also supply bedroom showers and a new hot tub. A propane-fired booster heater will be used in the first year until the effectiveness of the system is proven. If necessary, a second ourdoor furnace will be added in the future.