When people bemoan the high cost of home heating, often they are criticizing, knowingly or unknowingly, one particular system—the most ubiquitous type—traditional forced air. Though not without virtues, forced air depends on a network of rigid, full-size ducts, notoriously prone to heat loss. Leaky ducts can actually compromise overall system efficiency by 25 percent or more! That flaw may help explain your soaring bills. The Unico System, by contrast, keeps running costs low by minimizing heat loss to close to zero percent. It does so in multiple ways, but not least through dual-layer duct insulation. With virtually no energy wasted, you end up paying only for the warmth your family really felt.