Tools

mA / V signal ↔ engineering units, with % of span and a 2-point → slope/offset tab ready to paste into Niagara's ProxyExt.

Temperature ↔ resistance for the common HVAC sensors — 10K Type II / III, Johnson 8.7K, Schneider Type 5, 20K, 3K, 1K Balco, Pt100, Pt1000 — looked up both ways, or identify an unknown sensor from measured readings.

A 16-bit register laid out as a clickable bit grid, two-way bound to decimal / hex, with dec / hex / binary readouts.

Function codes and exception codes looked up by name or number, plus an RTU CRC-16 calculator that builds or checks a frame's checksum.

The hex address strings EBO shows for BACnet/IP devices ↔ dotted-decimal IP and UDP port, both directions.

Object types, property identifiers, and the engineering-units enumeration, filterable by name or number — decode object type 1 and property 85 without opening the standard.

Walk an AHU through its processes — mix outdoor + return air, then cool, heat, and humidify — on an interactive ASHRAE psychrometric chart that follows the header's US / Metric toggle. Drag OA and RA, or type leaving conditions; coil capacities appear when you set the airflow.

Required %OA to mix outdoor and return air down to a mixed-air dry-bulb setpoint, with a feasibility verdict and an OA-vs-RA enthalpy-changeover sanity check for high-end economizer logic.

Blend three air streams by mass flow (CFMs at the panel) or mass fraction (percentages off a schematic) and read out the full mixed-air state — dry-bulb, humidity, enthalpy, dew point.

Total, sensible, and latent capacity for a cooling or heating coil from its entering and leaving air — or run it backwards to solve the leaving-air state from a known load.

Dry-bulb + RH or wet-bulb to dew point at a glance — wet-bulb, grains, and enthalpy alongside — plus a coil check that flags whether supply air is dropping below the return dew point.

Saturation pressure ↔ temperature for R-410A, R-22, R-134a, R-407C, R-404A and R-454B — bubble and dew both, so blend glide is in plain sight — plus a superheat / subcooling check off a measured line temperature.

Size a control valve from its flow coefficient — Cv = Q√(SG/ΔP) solved any direction — plus a valve-authority check and a Kv equivalent for metric work.

Scale a known operating point to a new speed or trimmed impeller — flow with the ratio, head with its square, power with its cube. The energy case for VFDs.