Central heating equipment, warm-air, merchant wholesalers · New Hampshire
Total Air Supply: Derry
Derry, NH · ~54 workers · 2 years of OSHA Injury Tracking Application data.
- F
- Failing Safety Record
- 9.0
- Avg TCR
- 2.2
- Industry avg
- 0
- Fatalities
The verdict
Total Air Supply: Derry runs at 410% of its industry's injury rate - far more dangerous than the typical Central heating equipment, warm-air, merchant wholesalers workplace, earning a grade F.
- F
- Failing Safety Record
- 9.0
- avg TCR · per 100 workers
- 2.2
- industry benchmark (BLS)
- 9
- recordable injuries tracked
Grade compares Total Air Supply: Derry's OSHA Total Case Rate of 9.0 to the Central heating equipment, warm-air, merchant wholesalers BLS benchmark of 2.2 (410% of benchmark) across 2 years of Form 300A filings (2016–2024). <a href="/methodology">See methodology</a> for reporting-limitation caveats.
Injury rate over time
Total Air Supply: Derry's yearly Total Case Rate, against the 2.2 industry benchmark.
Where Total Air Supply: Derry falls in its industry
381 Central heating equipment, war establishmentsSafer than 3% of graded establishments in this industry, whose median TCR is 1.8.
Trend analysis for Total Air Supply: Derry
Between 2023 and 2024, Total Air Supply: Derry's Total Case Rate improved from 13.9 to 4.1 recordable injuries per 100 full-time workers, a 70% decrease across 1 year of OSHA reporting.
The safest year on record was 2024, at a TCR of 4.1, while 2023 saw the highest rate, at 13.9, a spread of 9.8 points between the best and worst reporting years. That's a wide swing relative to the establishment's overall rate, worth checking the year-by-year table below for whether a single severe year is driving the average, rather than a sustained trend.
Summed across those 2 reporting years, Total Air Supply: Derry recorded 9 total injuries and illnesses, with no fatalities reported in any of those years. Readers comparing establishments should weigh the 2-year trend above alongside establishment size, since a larger workforce naturally accumulates more raw incidents even at a lower per-100-worker rate.
Verify This Employer with OSHA
The 9 injuries shown on this page for Total Air Supply: Derry are sourced from its own 2 years of mandatory OSHA Form 300A summaries. Cross-check the underlying establishment record directly against the federal source, name, NAICS classification, recordable case totals, and inspection history are all searchable on OSHA's Establishment-Specific Injury and Illness Data system.
Verify on OSHA Establishment SearchSource: U.S. Department of Labor, OSHA Establishment-Specific Injury and Illness Data. NAICS 423730 - Central heating equipment, warm-air, merchant wholesalers.
DART Rate, Transparent Calculation (2024)
What is the DART rate formula?
DART (Days Away, Restricted, or Transferred) is computed by OSHA as incidents × 200,000 ÷ hours worked. The 200,000-hour denominator equals roughly 100 full-time workers, which lets establishments of very different sizes be compared directly.
2 DART incidents × 200,000 ÷ 96,853 hours worked = 4.13 DART
Methodology: 29 CFR 1904, OSHA Form 300A recordkeeping
Cross-Validating Context, Establishment vs Industry vs State
| Benchmark | TCR | Source |
|---|---|---|
| Total Air Supply: Derry (this establishment) | 9.01 | OSHA ITA Form 300A, 2-year avg |
| Central heating equipment, warm-air, merchant wholesalers industry avg | 2.20 | BLS IIF, NAICS 423730 |
| New Hampshire state avg (all industries) | 5.93 | OSHA ITA, state-level rollup |
Industry benchmarks: Bureau of Labor Statistics, Injuries, Illnesses, and Fatalities (IIF) program
Reportable Incident Timeline
Year-by-year reportable incidents (recordable injuries + illnesses + fatalities) submitted by Total Air Supply: Derry to OSHA's Injury Tracking Application. Each row anchors to OSHA's inspection records search where you can pull the underlying inspection case numbers and citations for that establishment-year.
- 2024: 2 reportable incidents · 2 injuries, 0 illnesses, 0 fatalities - OSHA inspection records (case numbers)
- 2023: 7 reportable incidents · 7 injuries, 0 illnesses, 0 fatalities - OSHA inspection records (case numbers)
Source: OSHA Inspection Information System (IMIS) - inspection case-number records
Year-by-Year Safety Data
| Year | TCR | DART | Injuries | Illnesses | Fatalities |
|---|---|---|---|---|---|
| 2024 | 4.1 | 4.1 | 2 | 0 | 0 |
| 2023 | 13.9 | 11.9 | 7 | 0 | 0 |
What this grade means for you
Use this grade as a relative read on Total Air Supply: Derry's reported OSHA injury record versus its Central heating equipment, warm-air, merchant wholesalers peers, not a verdict on whether any single site is safe today.
- At 410% of the Central heating equipment, warm-air, merchant wholesalers benchmark, Total Air Supply: Derry reports more injuries than typical peers, ask specifically how the employer is reducing them. Know your rights
- Judge this record against the wider Central heating equipment, warm-air, merchant wholesalers sector, where injury rates vary widely, before comparing it in isolation. See the industry
- Grades reflect 2016–2024 filings; check the latest establishment record straight from OSHA, or look up a different employer. Look up another
Safety grades reflect employers' self-reported OSHA Form 300A filings from 2016 to 2024 and can lag current conditions. A grade is not a guarantee that any specific workplace is safe or unsafe today. See our methodology and disclaimer.
Frequently Asked Questions
What is Total Air Supply: Derry's safety grade?
How many injuries has Total Air Supply: Derry reported?
Similar Employers
Matched by safety record across the industry, by workforce size within New Hampshire, and by nearby establishments in Derry - a different peer set than the category browse links below.
Similar TCR (~9.0)
Similar size (~54 workers)
Read our methodology - how this data is sourced, computed, and verified.
Every figure and grade on PlainSafetyScore is computed directly from OSHA's published Injury Tracking Application data and BLS industry benchmarks, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these safety grades, or report a data error. Data current as of 2016-2024 OSHA ITA release.