Thanks, that's exactly the sort of information I've been looking for! Though I disagree with the methodology used to calculate ongoing (operating) costs, as it

Thanks, that's exactly the sort of information I've been looking for! Though I disagree with the methodology used to calculate ongoing (operating) costs, as it seems that doesn't include the cost of replacement filters, only the cost of electricity. Many dedicated air filters have replacements that cost hundreds of dollars, so that seems like a huge oversight when comparing to standard MERV 13 furnace filters that I can pick up for $10 a pop. (The electricity price they used in their calculations is also nearly double what I pay, but that's an understandable deviation given that electricity prices can vary wildly by region.)