Even though it started as tag based and written in C++ back in 1995, it was released with a full rewrite in Java back in 2002 (Before Scala was even officially released) and has matured to a modern scripting language featuring Java interop, closures, dynamic typing, and OO patterns.
1 A proper home air duct cleaning costs anywhere from $400-$1,000, depending on the size of the system to be cleaned, the type of services offered, the regional climate and the level of use the ventilation system gets, the type of materials inside the ductwork and the amount of contaminants (dust, mold, etc.).hat should be included: Additional costs: 1  Cleaning should include: cleaning all of registers, inside the ductwork, the interior of the heating/ventilating system, the furnace fan, and the coils for an air conditioner or heat pump, according to Real-Estate-Agents.com.
What should be included: Additional costs: 1  Poorly designed or inadequately installed ductwork can decrease the efficiency of the heating or cooling system by as much as 40%. 2  HGTV Pro explains duct system design and installation. If the home's layout makes installation particularly challenging, replacing existing ductwork or adding it to a house that never had ducts can cost $5,000-$15,000 or more.