Case study · Preventive maintenance
Ductless Mini-Split Deep Cleaning – Gramercy, Manhattan
Wall-mounted ductless units collect dust, grime and moisture on the coil, blower wheel and drain pan. Over two visits we took several indoor units apart, cleaned every component and documented the before and after.
LocationCommercial space, Gramercy, Manhattan
EquipmentWall-mounted ductless indoor units
Condition foundGrimy coils, dirty blower wheels, clogged filters
ServiceFull disassembly and deep cleaning, two visits (May–Jun 2026)
What we found
- Evaporator coils coated with grime across the fins.
- Brown sludge sitting in the drain pan.
- Dark spotting and buildup in the fan housing.
- Air filters loaded with dust.
- Heavy buildup on the blower wheels, with dirty brown water coming off when rinsed.
What we did
- Took each indoor unit apart: front panel, filters, coil cover and blower wheel.
- Cleaned the coils with foaming coil cleaner and rinsed them thoroughly.
- Washed the blower wheels and cleaned the fan housings and drain pans.
- Cleaned or replaced the air filters.
- Reassembled each unit and checked operation.
As found
Cleaning and after
Our recommendation: clean ductless units on a schedule
Dirty coils and blower wheels cut airflow and efficiency, and they put dust and odor into the room. Most buildings should plan on at least one cleaning a year, and more for busy, high-use spaces.
We can set up recurring service for every ductless unit in your building, with a written photo report after each visit.
Request a ductless cleaningRelated: Ductless mini-split cleaning · HVAC and refrigeration in Manhattan · All projects