Spartan Building Scientists utilize passive designs, and best practices for building performance—SIP Panels, passive heating,  solar and on demand water heating, effective ventilation, control of solar gains linked to whole house automations systems—to dramatically reduce energy consumption by up to 90 percent. The “efficiency first” approach emphasizes design in the building shell that reduces the need for complex and expensive mechanical HVAC equipment. Instead of buying a forced air system—$30,000 for furnace, thermostats, ducts and so on—your thermal load  or the amount of heat and cooling required to maintain a comfortable temperature is managed at the most efficient levels.