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OpenTrain

HVAC Expert for AI Diagnostic and System Design

You will turn practical HVAC knowledge into examples that test how well AI models handle diagnosis, repair, and system design. You will also explain why solutions are correct and identify recommendations that are inefficient, technically wrong, or unsafe.

Field
Design & media
Where
United States, Albania, Algeria, Antigua and Barbuda, Armenia, Australia +89 more
Hours
up to 10/week
Posted
5 days ago

Pay data for your profession: Visual design AI trainer jobs

How this pay compares

At $70/hr (the midpoint of $50 to $90), this role pays more than 50% of the 58 open design & media roles with a listed pay range, the same as the median.

Among platforms with 10 or more priced design & media roles, Mercor has the highest median ($75/hr across 15 roles) and OpenTrain AI the lowest ($70/hr across 35).

OpenTrain AI roles that closed since late October stayed listed a median of 31 days (122 roles). OpenTrain AI posted this one 5 days ago.

Computed from 2,746 open roles we track across Mercor, micro1, Handshake AI, Alignerr, Appen and OpenTrain AI, refreshed daily. Midpoints of listed ranges; “up to” ceilings are left out of medians.

What you would earn at this rate

Per week, before tax

$700

Per month, if the work is steady

$3,033

Tax
Contract pay arrives with no tax withheld. A US contractor at this rate and these hours would set aside about $767 a month for self-employment tax plus federal income tax at the 12% bracket (25%, before state tax). Outside the US, your own country's rules apply.

Assumes paid hours only; unpaid assessments, onboarding and gaps between projects lower the real figure. Full take-home calculator · Track what you actually earn

Open design & media roles on each platform

The same kind of work, priced on every platform we track, with the best-paid open role on each.

PlatformOpenMedianBest-paid open role
Mercor15$75/hrCommercial Video Editor & Post-Production Lead (AI Evaluation)$70-120/hr
OpenTrain AIthis role35$70/hr2D Design Expert AI Evaluator$125/hr
micro13$70/hr3 pricedSenior Photographer$55-105/hr
Alignerr5$40/hrFilm Scene Description Specialist$40-120/hr
Handshake AI9up to $125/hr2D Design ExpertUp to $125/hr

“Up to” rows list only ceilings, so their median is a maximum, not comparable with the range midpoints above them.

All 67 open design & media roles →

The full listing

As posted on OpenTrain AI. See the original

The work

You will turn practical HVAC knowledge into examples that test how well AI models handle diagnosis, repair, and system design. You will also explain why solutions are correct and identify recommendations that are inefficient, technically wrong, or unsafe.

The work includes reviewing advice that could damage equipment or create serious hazards, such as compressor damage or carbon monoxide entering a home.

  • Create realistic HVAC scenarios that move from symptoms to diagnosis and repair.
  • Write reference answers explaining system behavior, charge selection, duct sizing, and sequence of operations.
  • Evaluate AI responses for technical accuracy, efficiency, and safety.
  • Identify plausible but unsafe or technically incorrect HVAC recommendations.

What it pays and takes

This is remote, asynchronous contractor work. The role is open to candidates in the countries listed for the project and requires clear written English for documenting diagnostic reasoning.

  • Pay: $50 to $90 per hour, paid weekly via Stripe.
  • Schedule: At least 10 hours per week, with no maximum weekly commitment.
  • Location: Remote and open to candidates in the listed countries.
  • Language: Fluent written English.
  • Certification: EPA Section 608 certification.
  • Licensing: State HVAC licensing where required.
  • Experience: At least two years in HVAC installation, service, or controls.
  • Knowledge: Refrigeration cycles, airflow, and load calculation.
  • Helpful background: Residential service, commercial refrigeration, controls, heat pumps, geothermal systems, high-efficiency systems, building automation, or NATE certification.

How it works

Apply on OpenTrain with your resume, then complete the application on the hiring site.

About AI training work

AI training work is the human side of building artificial intelligence. People create examples, write explanations, and review model responses so AI systems can produce more accurate and safer results; experienced specialists are paid for applying real professional judgment.

From applying to your first payment on OpenTrain AI

  1. 1

    Create a profile

    Create a free OpenTrain profile with your domains, languages and hourly rate.

  2. 2

    Apply

    Apply to the listing. Some listings hire through OpenTrain; others send you to the hiring platform.

  3. 3

    Funded milestones

    The client funds each milestone before work starts.

  4. 4

    First payment

    OpenTrain pays out to your connected payout method when the client approves the milestone. It doesn't publish a fixed payout schedule.

Sources: OpenTrain: AI training careers, OpenTrain docs: invoicing and payouts

Full OpenTrain AI profile: watch-outs and the public record →

Pay history

OpenTrain AI has listed this role at $50-90/hr since Nov 10, 2026 with no change.

Across OpenTrain AI's design & media roles, the median listed pay was $31/hr on Nov 1, 2026 (10 roles) and is $70/hr as of Nov 11, 2026 (35 roles).

What workers report about OpenTrain AI

Anonymous reports from people who applied or worked there: whether they got work, what they were paid and how fast.

Other design & media roles

All 67 design & media roles →