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Point an anomaly detector at expense review, and let people review output instead of producing it. Aimed at hvac & plumbing owner-operators, closing the loop while everyone is asleep.
In short: HVAC & plumbing Expense Reviewer is an anomaly detector aimed at hvac & plumbing owner-operators, covering expense review. It scores 72/100 on AltF Ideas, carried by demand (92) and held back by open field (37). Typical pricing is $3.9k–$59k per customer per year, with a first version reachable in six to twelve months for $38k–$131k.
HVAC & plumbing teams lose expenses approved without anyone actually reading them. In most hvac & plumbing businesses this job has never had software written for it. The error rate is tolerated because measuring it would cost more than the errors.
An anomaly detector that sits beside the existing system, reads what it already produces, and closes expense review. Revenue is data subscription, which suits a buyer who wants the cost to track the value rather than the seat count.
| Total addressable market | $627M |
|---|---|
| Category growth (CAGR) | 15% |
| Annual contract value | $3.9k – $59k |
| Pricing model | Data subscription |
| Time to first revenue | 51 days |
| Startup cost to MVP | $38k – $131k |
| Build effort | 6-12 months |
Streaming detection became practical without a dedicated data platform. HVAC & plumbing is growing at roughly 16% a year, and this job has not been re-tooled since it was designed around paper.
| Who | The gap |
|---|---|
| A generalist AI tool | No domain grounding, so output needs full human review |
| An offshore back office | Cheaper per hour, but does not scale down to the tail |
| A spreadsheet | The real incumbent in most of the market, and it is free |
Integrations with the incumbent system of record are undocumented and gatekept.
An idea you cannot act on is entertainment. Four concrete steps, wired to tools already running on AltFTool.
Score problem urgency, willingness to pay, and reachable audience size before writing any code.
→ AltF IdeaLabAsk how they handle this today and what it costs them. If nobody can quantify the pain, the demand score is optimistic.
→ Survey BuilderCheck availability, DNS, and email authentication in one pass so your first outreach lands in an inbox.
→ AltF DomainOpsStand up intake, the review queue, and billing before you build the clever part.
→ AltF Flow