Modelled from the manufacturer's published data — not verified by EVAPCO. Source: EVAPCO ATWB Engineering Data & Dimensions — the model's own row (nominal tonnage, airflow in CFM, fan motor and its printed count, height and length) and the sheet's own note: nominal tonnage is 3 gpm per ton at 95 °F entering water, 85 °F leaving and a 78 °F wet bulb. Its second condition is EVAPCO's own CTI 49-point table, which the model reads at 0.22 K RMS over 45 945 points (docs/evapco-cti-source.json). The figures below come from this model run against that data; the manufacturer has not reviewed them. Are you EVAPCO? Claim this page.
CTI STD-201 (validation C13F-09R12) ✓ verified — this model is named in the certification programme's own public register. It certifies the manufacturer's machine against their published ratings; it says nothing about the model of it that runs here, which is validated separately.
by HVAC Builder
Open this system in HVAC Builder Load it into the 3D builder, adjust it to your project, and solve it against your own climate — or drop it into a building model and simulate a full year.
EVAPCO's 12-4O40 — a ATWB closed-circuit cooler, 1014 nominal tons (4457 kW): rated to cool 2543 USGPM of process fluid from 102 to 90 °F at a 75 °F entering wet bulb on 141.3 m³/s of air, the maker's own printed airflow, and drawn at those flows with an induced-draft fan on the leaving air, pulling through the fill. The process fluid runs inside a coil under the spray — the evaporative wet-coil model, its two conductances split as the range's own coil volumes say. The model derives the machine's NTU from that one certified point, so it reproduces the rated leaving process fluid exactly and predicts nothing else — one point per model is an input, not a validation. Modelled from the manufacturer's published data — not verified by EVAPCO. Published as an example; the figures below are solved from this model.
Example3343–5572 kW coolingEUExample system. Published by HVAC Builder to show suppliers what their own page looks like. There is no company behind it and it is not a product offer — the specification is generic and the performance is solved from the model on this page.
Solved from this example's own model each time the page loads — the same numbers a supplier's page shows for their machine.
| Component | Kind | Duty |
|---|---|---|
| 12-4O40 fill | wetPack | -4410.2 kW |
| 12-4O40 fan | fan | -74.6 kW |
| 12-4O40 tower-loop circulator | pump | — |
Publish your own range and this slot becomes your branded page — your data, your logo, your product link, and quote requests that reach you. Free to register and free to publish.