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The profitability of duct cleaning can be quite significant for service providers. For example, if the average residential duct cleaning job generates around $500 in revenue, performing just two jobs per day over a five-day workweek would result in a total income of approximately $5,000. This calculation demonstrates that with consistent demand and efficient scheduling, a duct cleaning business can achieve substantial weekly earnings. Additionally, since the cost of supplies and labor is relatively low compared to the service fee, profit margins tend to be healthy. Therefore, duct cleaning can be a lucrative service, especially for those who build a steady customer base and maintain high-quality standards.