For HVAC work, the ideal multimeter should have:
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True-RMS measurement for accurate readings on non-linear loads
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Built-in thermometer or temperature probe for HVAC system diagnostics
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Low-impedance (LoZ) mode to eliminate phantom/ghost voltages in complex control circuits
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Microamp input for flame-sensor current measurement
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Safety rating of at least CAT III 600 V to handle panel and control voltage zones
Enrgtech stocks high-quality multimeters matching these criteria.
