Recurring maintenance contracts and a stable technician base raise value. Larger HVAC firms attract private-equity buyers at higher multiples.
HVAC Companies are usually valued on SDE / EBITDA, with multiples generally roughly 2x–4x SDE (higher for larger, recurring-revenue firms). Treat this as a starting point, not an appraisal — your actual multiple depends on size, margins, owner-dependence, customer concentration, and recent trend.
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As a general rule of thumb, hvac companies trade around roughly 2x–4x SDE (higher for larger, recurring-revenue firms) on SDE / EBITDA, though this varies widely. Get a professional valuation for your specific business.