This is a 7,800sqft ICF home in Calgary, Alberta of a husband and wife business team who own a mechanical contracting company.
The home has a single high efficiency wall mount boiler serving 14 zones of hydronic floor heating, reheat coils on three ERV's, plus an indirect fired domestic water heater. A total of six controllers manage the fuel and power consumption for the entire project. The key is the total comfort system: air for humidity, ventilation, heat recovery and supplemental heat; hot water for radiant, domestic water and fan/coils. Over 12 separately controlled zones.
The "boiler rooms in a box" (zone control panels) are consumer friendly devices, which are distributed like appliances through reputable wholesalers and contractors throughout the world. They are standard items in Europe, but found their way to North America a few years back.
The highest gas bill for this home... eh, are you ready? A whopping Ca$280. Yep that is for a 7,200sqft home... in Calgary, Alberta. And they cook with gas! Not only that, but... $60 dollars of that gas bill is service charges. On the power side they consume about Ca$175 in the winter months, which includes outdoor lighting. When a building is efficient, and the mechanical system is efficient, everything is smaller including fuel and power bills.