The New Engineer — HVAC

DETERMINISTIC: the same inputs always give the same result — from any AI, on any day. Figures come from the standard's tables and formulas, never from a language model's estimate. Every step is auditable. Size the expansion vessel and pressurisation of a closed heating or chilled-water circuit to EN 12828: static height, minimum pressure p0, fill pressure pa, final pressure pe, expansion

DETERMINISTIC: the same inputs always give the same result — from any AI, on any day. Figures come from the standard's tables and formulas, never from a language model's estimate. Every step is auditable. Deduce the water content of an installation from the expansion vessel already fitted. WHAT THIS IS FOR. Refurbishment, and site visits with no drawings. Sizing a new vessel, a new pump or a new

DETERMINISTIC: the same inputs always give the same result — from any AI, on any day. Figures come from the regulation's annexes and thresholds, never from a language model's estimate. Every step is auditable. Swiss refrigerant regulation check (ORRChim / ChemRRV annex 2.10, OFEV synthesis of May 2026, rules adopted 29.10.2025) plus refrigerant data from EN 378-1 Annex E: GWP (AR4, the ORRChim ba

DETERMINISTIC: the same inputs always give the same result — from any AI, on any day. Figures come from the standard's tables and formulas, never from a language model's estimate. Every step is auditable. EN 378 applied to BUILDING projects, volume by volume. An installation does not occupy one room but several: the machine, the rooms crossed by refrigerant lines, the rooms served by indoor unit

CALL THIS FIRST, as soon as the user gives you a token. It answers within seconds, while the network graph is still being built - use that time to think. THE CIRCUITS OF A MODEL IN FOUR CALLS: 1. read_ifc_overview - this call: the types of the model. 2. apply_ifc_rules - your rules. Give air handling units, monoblocs and ventilation casings the role centrale_de_traitement_d_air, and

Turn what you read in the overview into rules the tool replays on EVERY piece of the model, including the ones you were never shown. THIS IS HOW THE TOOL LEARNS A MODEL. read_ifc_overview gives you some fifty groups — one per object type, not one per piece. You answer with RULES on those groups, and this tool applies them to the three thousand pieces. You never give a verdict piece by piece: the

DETERMINISTIC: networks come from geometry, not from a guess. The same model always gives the same networks, from any AI, on any day. Read the networks of an IFC model already uploaded by the user. WHAT A NETWORK IS. A set of parts that touch each other, cut at equipment: a pump, an air handling unit, a chiller separates two systems, so the tool does not run through them. This is measured on the

Apply the names you propose, and get back the updated report. THE NAMES ARE YOURS, THE NETWORKS ARE NOT. You are naming what the tool measured; you are not changing what it measured. Nothing you send here alters a network, a part, or a correction. WHAT COMES BACK. The updated report, a 3D link where the user sees your names in colour, and a link to the corrective Dynamo script that writes the sy

THE CIRCUITS THE FANS OF A MODEL ARE SIZED ON, found without anyone clicking and computed on the pressure-drop page, where the user confirms types and flows and reads the pressure drops. ONLY UNITS AND FANS ARE EXCHANGED. The tool never sends you system names: it sends the air handling units and fans your rules found, each with what the network walk finds connected to it - geometry, not names. A

Show an upload box in the conversation where the user can drop an IFC file (.ifc) of a building services model (HVAC, plumbing, heating). The file goes straight from the user's browser to thenewengineer.com - you never see it. CALL THIS when the user wants to analyse an IFC model and has not yet given you a link from thenewengineer.com. Then tell the user to drop the file in the box. When the up

Where the upload stands. When `state` is `depose`, `token` is the token to pass to read_ifc_networks.