Earthquakes and landslides are the two most serious landform-related natural hazards in Utah, whereas floods, wind, fire, and avalanches are the most prominent weather-related ones. Earthquake danger in Utah is high because of the large number of faults located in the state.
Split units do not require duct work, while packaged units do. Adding central air conditioning to a home with an existing forced-air heating system in a 2,000-square-foot house averages $3,000 - $4,000. If ducts need to be added, the cost can double, and a split unit is the way to go. As opposed to window units, a ductless system is quieter, and can also heat your home.
Return air plenums are the ducting units used as the central chamber for return air ducting. Furnaces and air handlers should have a return air plenum so that they can operate at their maximum efficiency.Return air plenums recycle the air in a structure back to the air handling unit and exhaust the air out of the home.enerally, a return air plenum will cost approximately $50 to $60 per unit. The other costs to consider are those for the labor and materials needed to install the return air plenum. The installation takes an average of about five hours with the sum of labor costs between $290 and $370.