What's included
- Outer cabinet and louvers
- Fan guard exterior
- Hanger rods and brackets
Not included
- Burner, heat exchanger, venting or gas line service
- Electrical work
Why it matters
Dust on heaters is often burned when the heater first runs in the fall, causing odor.
More on why it matters
Heaters are mounted high in large spaces where routine cleaning never reaches.
How AELC providers clean unit heaters
Every provider follows the AELC Source-Control Method: capture the dust, don't move it.
- IdentifyConfirm the heater is off and cool and note its height and reach class.
- CaptureVacuum the cabinet, louvers and guard with a HEPA source-capture vacuum.
- ContainDamp-wipe exterior surfaces.
- VerifyReport damaged louvers or visible venting issues to the facility.
How often, and how it's priced
Recommended frequency
| Warehouses and shops | Once a year, before heating season |
Pricing is local
Your local AELC Certified Provider sets the price for your space. What affects it:
- How many unit heaters you have
- Height and access
- Dust, grease or buildup
- One-time reset or recurring schedule
DIY tips between professional visits
- Schedule exterior cleaning before the heating season and burner service by an HVAC technician.
Safety: when work stops
- Never work on a heater that is running or hot.
- Gas or venting concerns go to a licensed HVAC contractor immediately.
See all red-light conditions and what AELC does not do.
Who needs it most
Ceiling-Mounted Unit Heater Exterior Cleaning: FAQ
Why does my heater smell when it first turns on?
Dust that settled on the heater during the off season can burn off. Cleaning the exterior before heating season reduces that odor.
Last updated October 4, 2026. Reviewed by the AELC Method team. Local services are performed by independently owned AELC Certified Providers. Above Eye Level Cleaning.