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Lennox International vs Tecogen: LII and TGEN compared
Lennox International is the larger company: $1.6B of revenue in its latest quarter (Q3 2026) against $5.7M for Tecogen (Q2 2026). Lennox International is growing faster (+10% against -21% a year earlier). Lennox International is more profitable, with an operating margin of 19.8% against -37.4%.
Where the money goes: LII and TGEN
Lennox International (LII) · Q3 2026
Lennox International, Q3 2026: revenue $1.6B (+10% year over year), operating margin 19.8%, net earnings $221M, operating cash flow $395M. The chart follows the revenue to costs, profit and cash.
Tecogen (TGEN) · Q2 2026
Tecogen, Q2 2026: revenue $5.7M (-21% year over year), operating margin -37.4%, net loss $2.1M, operating cash flow −$2.4M. The chart follows the revenue to costs, profit and cash.
| Lennox International (LII) | Tecogen (TGEN) | |
|---|---|---|
| Latest quarter | Q3 2026 | Q2 2026 |
| Revenue | $1.6B | $5.7M |
| Revenue growth, Y/Y | +10% | -21% |
| Gross margin | 31.6% | — |
| Operating margin | 19.8% | -37.4% |
| Net earnings | $221M | −$2.1M |
| Net margin | 14.1% | -37.3% |
| Operating cash flow | $395M | −$2.4M |
| Free cash flow | $362M | — |
| Market value | $11.7B | — |
| P/E | 15.7× | — |
| Analysts’ mean target | $371.92 | — |
Where the revenue comes from
Lennox International
- Residential Heating and Cooling: $937M (60%)
- Commercial Heating and Cooling: $635M (40%)
Tecogen
- Services: $4.4M (76%)
- Products: $1.1M (20%)
- Energy production: $236K (4%)
Questions
Which is bigger, Lennox International or Tecogen?
Lennox International is the larger company: $1.6B of revenue in its latest quarter (Q3 2026) against $5.7M for Tecogen (Q2 2026).
Is Lennox International or Tecogen growing faster?
Lennox International is growing faster (+10% against -21% a year earlier).
Which is more profitable, Lennox International or Tecogen?
Lennox International is more profitable, with an operating margin of 19.8% against -37.4%.
More: Lennox International earnings · how Lennox International makes money · Tecogen earnings · how Tecogen makes money
From the companies' latest 10-Q, 10-K or earnings release (10-Q filed Oct 28, 2026; 10-Q filed Aug 13, 2026). Fiscal quarters can end on different dates. Not investment advice.