HVAC · Published aggregate
Dallas County
County-level public-record indicators only. A business is described only as having “left the roll”; the record does not explain why.
Number-sequence tenure is an inference from licensing records, not a founding date, owner age, or evidence of continuous operation.
Dallas County HVAC market summary
Dallas County has 1,597 published aggregate firms in the HVAC record. The single-holder indicator is 97%; trade-tenure data is not available for this trade. The 12-month roll-change fields record 27 joined and 21 left.
Source: tdlr_airref_20261110.csv · Pull date: Nov 10, 2026Compared with the published HVAC total
The published county/trade aggregates sum to 17,638 firms statewide for HVAC. Their combined single-holder share is 98%. This is a comparison of the published aggregate rows, not an independent estimate.
Source: tdlr_airref_20261110.csv · Pull date: Nov 10, 2026Other published trades in Dallas County
- Electrical: 799 aggregate firms; single-holder share 100%. Source: tdlr_electrical_20261110.csv · Pull date: Nov 10, 2026
- Plumbing: 544 aggregate firms; single-holder share 99%. Source: tsbpe_RMP_20261110.csv · Pull date: Nov 10, 2026
Recorded roll-change history
The latest county/trade roll pull is dated 2026-11-10: 8 joined and 5 left. This reports changes in the public roll only; it does not explain why a firm left.
Source: tdlr_airref_20261103.csv, tdlr_airref_20261110.csv · Pull date: Nov 10, 2026Earlier county/trade roll pulls
- 2026-11-03: 12 joined, 8 left. Source: tdlr_airref_20261027.csv, tdlr_airref_20261103.csv · Pull date: Nov 3, 2026
- 2026-10-27: 7 joined, 8 left. Source: tdlr_airref_20261022.csv, tdlr_airref_20261027.csv · Pull date: Oct 27, 2026