The Short Answer: 30 to 60 Minutes
For most San Antonio homes, a professional dryer vent cleaning takes 30 to 60 minutes from start to finish. Simple, short vent runs with light buildup can be done in 30 minutes. Longer runs, roof-exit vents, or heavy lint accumulation may take up to 90 minutes.
| Situation | Estimated Time |
|---|---|
| Short vent run (under 10 ft), light buildup | 30–45 minutes |
| Standard vent run (10–20 ft) | 45–60 minutes |
| Long vent run (20–30+ ft) | 60–75 minutes |
| Roof-exit vent | 60–90 minutes |
| Heavy lint buildup or partial blockage | Add 15–30 minutes |
| Bird nest or debris blockage | Add 20–40 minutes |
What Happens During a Dryer Vent Cleaning?
Step 1: Assessment (5–10 minutes)
The technician locates the dryer connection point and the exterior vent termination (wall cap, roof cap, or soffit vent). They measure the vent run length, identify the number of bends, and note the duct material. This assessment determines the approach and flags any issues like crushed flexible duct or missing vent caps.
Step 2: Airflow Test — Before Cleaning (5 minutes)
A baseline airflow reading is taken at the exterior vent. This gives a before-and-after comparison to confirm the cleaning was effective. If airflow is severely restricted, it confirms a significant blockage.
Step 3: Rotary Brush Cleaning (15–30 minutes)
Using a high-powered rotary brush system attached to a professional-grade vacuum, the technician cleans the full length of the duct from the dryer connection point. The rotating brush dislodges lint from the duct walls while the vacuum captures it — preventing lint from being pushed further into the duct or blown into the laundry room.
For roof-exit vents, the technician also cleans from the exterior vent cap downward to ensure the full run is cleared from both ends.
Step 4: Lint Trap Housing Cleaning (5–10 minutes)
The lint trap housing — the cavity inside the dryer that the lint screen slides into — accumulates fine lint that the screen doesn't catch. This area is cleaned with a specialized brush, as buildup here restricts airflow even when the vent duct itself is clear.
Step 5: Airflow Test — After Cleaning (5 minutes)
A final airflow reading confirms the vent is clear and performing properly. Sweeppy technicians share both readings with you so you can see the measurable improvement.
Step 6: Inspection and Report (5–10 minutes)
The technician inspects the duct material, connections, and exterior vent hood for any issues: disconnected sections, crushed flexible duct, improper duct material (vinyl or foil instead of rigid metal), or a damaged/missing exterior cap. Findings are documented in a written report, and any recommended repairs are quoted in writing.
What Makes Dryer Vent Cleaning Take Longer?
Vent length and configuration: Every foot of duct and every 90-degree bend adds cleaning time. San Antonio homes with interior laundry rooms often have vent runs of 20–30 feet with multiple bends — significantly longer than the 5-foot runs common in older homes with exterior laundry rooms.
Roof-exit vents: Cleaning a roof-exit vent requires accessing the roof and working from both ends of the duct. This adds 15–30 minutes and requires additional safety equipment.
Heavy lint accumulation: If the vent hasn't been cleaned in several years, lint may be compacted and partially blocking the duct. Heavily clogged vents require more passes with the rotary brush and take longer to fully clear.
Bird nests: Sparrows and other birds frequently nest in dryer vent hoods, especially in spring. Nest removal adds time and requires cleaning the duct thoroughly after removal.
Duct repairs: If the inspection reveals disconnected duct sections, crushed flexible duct, or a damaged vent cap, repairs are quoted separately and can be performed the same day in most cases.
How to Prepare for Your Dryer Vent Cleaning
- Run the dryer for 10 minutes before the appointment to loosen any lint
- Pull the dryer away from the wall slightly to give the technician access to the connection point
- Clear the area around the dryer and the exterior vent cap
- Plan for 60–90 minutes to be safe
Sweeppy's Dryer Vent Cleaning Service in San Antonio
Sweeppy serves all of San Antonio and surrounding areas including Stone Oak, Helotes, Alamo Heights, Shavano Park, Boerne, Schertz, and Converse. We use professional rotary brush systems, provide before-and-after airflow readings, and charge flat rates starting at $99.
Call (210) 418-9810 to schedule. Same-day service available. First-time customers save $50.
