WMA is better than SMA because of the ability to vary the weights! Time Series: Exponential Smoothing (ES) Main idea: The prediction of the future depends mostly on the most recent observation, and on the error for the latest forecast.
New Furnace Costs. A new furnace cost roughly $3,800 and most homeowners pay between $3,250 and $4,420 to install a new furnace. The lowest price that a homeowner might pay is $1,500, while the maximum price a homeowner has reported paying for a furnace replacement or installation was $8,000.
How much does it cost to install a gas central heating? The installation of a new gas furnace in a home with good pre-existing duct work will average $6000 to $8000. When the work involves renovation and the opening of walls, ceilings, crawl spaces or attics the costs can head upwards of $10,000 to $14,000.