![Derek Sim](https://homeyou.s3.amazonaws.com/contractors/1119199/1227-longview-drive-ca-diamond-bar-91765.jpg)
Derek Sim
HVAC Technician -
Diamond Bar, CA
Highlights
- Air Duct Cleaning in Chino Hills, CA
- Duct Repair in Placentia, CA
- AC Installation in Rowland Heights, CA
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