2026-08-27Listed in the Claude connector directory
The MCP server passed review and is listed: open the listing, press Connect, sign in and approve — no URL to paste. Every other MCP client still connects at hvacbuilder.app/api/mcp with the same sign-in.
2026-08-27The saturation line corrected by one percent
The psychrometric calculator found the moist-air saturation line carrying a flat 1.015 enhancement factor where ASHRAE's is about 1.004; it now follows Buck's pressure- and temperature-dependent factor and matches ASHRAE Table 2 within 0.1 %. Every humidity read at a given RH is about 1 % drier for it; the coil calibration was re-read on the corrected line (0.80 → 0.81) and the vendor anchors hold.
2026-08-27Two free tools
A psychrometric calculator (dry bulb plus wet bulb or RH at any altitude) and a compressor-map lookup over the catalog's thousands of published AHRI 540 maps — capacity, power, COP and mass flow at your evaporating and condensing temperatures, and whether the point is inside the envelope. No account needed; every result is a link.
2026-08-27Glossary terms on their own pages
Every glossary term — DOAS, SZVAV, VAV box, economiser, waterside economiser, DCV, face-and-bypass, head-pressure control, humidity bounds, cycling and modulation, coupling, priority, category, nested system, design point — has a page of its own under /docs/glossary, titled as the question people ask, and every documentation section now says what it is about in its description.
2026-08-27A page for every catalog entry
Each of the catalog's listings — 4 776 compressor maps among them — has a public page: the published specification, a compressor's capacity, power and COP across its envelope, the brand, the validation behind the model, and a link into the builder. A second sitemap lists them.
2026-08-27Product notes, opt-in
Tick "product notes" on your account and an occasional mail tells you what shipped — written by hand when there is news, never on a schedule, one click to stop.
2026-08-27The directories speak twelve languages
/systems, /components and /companies render their titles, intros, search, sorts, filters, pager and counts in the site's language; listing names, kinds, categories and regions stay as their suppliers wrote them.
2026-08-27Reports in twelve languages
The spec report, the building report and the shared run page render in the app's language — headings, tables, chart captions and footers; the component schedule's engineering shorthand, model names and the CSV stay as they are.
2026-08-27Draw a room's occupancy
The occupancy profile's bars are the editor: press or drag across the strip to draw the day; the paste field follows. Buttons and chips grow to a fingertip's size on touch screens.
2026-08-27A plate exchanger, and the campus plant free-cools
A water-to-water plate exchanger is a component kind: two water streams, counterflow, its UA from the datasheet's rated point, an economiser flag for the changeover valves. A plant holding a leaving-water setpoint with one gets a free-cooling stage ahead of its chiller stage; the example campus plant on New York runs its winter on the tower fans and pumps.
2026-08-27Share a building run as a link
A finished building run has a Share link button: a read-only page at /r/{token} with the rooms' comfort, each machine's energy and sizing — no sign-in, never the design, withdrawn the moment sharing stops.
2026-08-27Category tags in quote matching; a marketing backlog
A quote request carries the design's category and suppliers declaring system types are matched on it. Worked-case pages for the eleven example buildings, this changelog, a validation page.
2026-08-26Docs split into a guide and an API reference
/docs explains the product from a user's side — concepts, kinds of systems, how a machine is run; /reference holds the component table, the configuration reference, REST and MCP. Landing pages updated in twelve languages.
2026-08-26MCP coverage: sixteen new tools
Buildings can be created, read, updated and deleted; quotes matched and requested at system and building grain; offerings published, updated and withdrawn; the catalog searched. A guard holds every API route to a tool or a named excuse.
2026-08-26System category tags on the company profile
Suppliers declare the system types they build; a facet on the supplier directory and a line on the profile page. The profile's refrigerant list is the property backend's full list.
2026-08-26A component has an editable name
The config panel's Name field sets the label the canvas, reports and quote requests show.
2026-08-26The cleanroom dries by its bypass
A makeup-air unit was built, measured and declined; face-and-bypass takes the example cleanroom from 549 to 162 MWh of electricity a year. The priority rule gained a moisture side; a heater on a cooling hour is booked as reheat.
2026-08-26Example library batches 3 and 4
A logistics hall on two-stage evaporative coolers, a telecom shelter, a campus district plant with a rated tower, a cleanroom on a RadiPac fan bank, a supermarket with a frozen store on a refrigerant pair, an operating suite with a steam humidifier and a room humidity floor.
2026-08-26Systems of systems
A saved or published system can be placed into a design as one block, wired at its open ports, and solved flat — three levels deep; suppliers publish compositions flattened, with consent for reuse of another supplier's offering. Every system carries a category.
2026-08-26Pipe routing on lanes
Connections in both 3D scenes run on a lane per fluid with square corners, leave a port the way it faces, and can be dragged into place.
2026-08-25Block couplings and VAV terminals
Machines in a building are joined port to port — water, air and refrigerant pairs, manifolds, buffer volumes — and a VAV handler meters its rooms through terminal boxes with reheat. Room humidity ceilings with reheat or bypass. Example hotel, office floor and primary school, each on its own weather city.
2026-08-24Strict catalog resolution; a pump is a curve
A component naming a catalog item is solved with the store's own data at every entry. Pumps carry their vendors' curves; fan banks declare their arrangement. Copeland variable-speed maps detected from the data. The MCP saved-system round trip completed.
2026-08-23Coils calibrated against published ratings; 4 776 Copeland maps
The coil model checked against Carrier's 36-point matrix and Colmac's worked selection, contact resistance given its own name; every Copeland family converted from the vendor's own rating database with its published envelopes; fans read their power off a curve through the fan laws.
2026-08-22Example mall anchored
The DOE prototype occupancy schedule, 62.1-derived ventilation floors, NREL's moisture capacitance; named vendor entries for heat pipes, evaporative media, duct heaters, a RadiPac fan and circulators.
2026-08-21One Simulate surface
Everything that runs against a weather year lives in one tab; a draft with no rooms sweeps the machine flat out, the first room makes it a closed loop.
2026-08-20One meter
Compute tokens are the only meter: a point solve costs one per ten components, a simulated year ten times that; there is no size cap.
2026-08-16Workspaces and supplier identity
One supplier identity per Enterprise workspace; a first-month discount ladder; capability-routed quote requests at whole-system, component and building grain.
2026-08-15Deploys by tag
Production deploys by per-commit tag with automatic rollback and a maintenance page.