Can the one company perform residential and commercial duct cleaning? Yes but they have two residential division and commercial division.
The duct cleaning equipment is absolutely different. The residential duct cleaning is done whit truck mounted equipment (commercial vacuum) whit gas engines they have to by outside. The commercial duct cleaning is done whit HAPA portable vacuum and compressor power from electrical engine. The risen for electrical power equipment is needed for the commercial division is massive indoor square feet of the commercial properties and the truck mounted equipment won’t be able to reach the commercial HVAC system. The air duct cleaning TOOLS and ACCESSORIES: Unibit, Blowgun air gun, Octopus Predator Whip, SCORPION ROD, Dryer Vent Snake, Reverse Spinning Skipper Ball, Forward Spinning Skipper Ball, Scorpion Spinning Brush, 6 Jet, Scorpion Scrub Brush, Air brush snaking system. All those air duct cleaning tools can be used in the residential and commercial duct cleaning whit one difference only they are different sizes for the residential air duct cleaning the maximum ducts sizes is up to 16” the Indoor air quality technicians are going to clean the duct system whit air brush snaking tools maximum 16”. On the commercial projects the duct system are starting from 16’ and up in that situation every commercial job is clean whit different size tools (Skipper Ball, Scorpion Spinning Brush, 6 Jet, Scorpion Scrub Brush, Air brush snaking system).
Don’t be confused from the names of those air duct cleaning tools all they do is creating negative pressure in the HVAC system whit the vacuum system and the air duct cleaning technicians are loosing the accumulated dust and debris stack in the vents (loosing the cavities).