We have been working with SDHV Systems for almost 30 years. We know that you can't compare a less efficient, less comfortable, conventionally ducted system requiring far more space and compare it to a SDHV System. If you don't put a premium on comfort, efficiency, interior design and added living space then you won't appreciate the cost comparison to a "low ball Conventionally Ducted System Estimate. We would prefer to respond by saying if you add all of the options required to improve the efficiency and comfort of Conventionally Ducted Systems to their cost, the cost of SDHV Systems would be similar. SDHV Systems provide competitive costs for superior performance.