Engineering calculations,
made simple.
Cooling loads, psychrometrics, sizing — what used to take hours in spreadsheets, finished in minutes. Every value compliance-checked against ASHRAE · AHRI · AIRAH · CIBSE — methodology cited inline, ranges validated beside the result.
| ZONE | AREA | COOLING | AIRFLOW | SHR |
|---|---|---|---|---|
| Z01 · Reception | 32 m² | 3.8 kW | 180 L/s | 0.78 |
| Z02 · Office (East) | 78 m² | 10.2 kW | 425 L/s | 0.82 |
| Z03 · Office (West) | 76 m² | 9.8 kW | 410 L/s | 0.81 |
| Σ Building | 186 m² | 27.1 kW | 1135 L/s | 0.79 |
| STANDARD | REGION | SCOPE | STATUS |
|---|---|---|---|
| ASHRAE Fund. 1997 | US/Global | Cooling load method (CLTD/CLF) | ✓ Cited |
| AS 1668.2 | AU/NZ | Mechanical ventilation | ✓ Met |
| AIRAH DA09 | AU | Load density benchmark | ✓ Within range |
| NCC Section J | AU | Energy efficiency provisions | i Reviewable |
| CIBSE Guide A | UK/EU | Comfort criteria · 22°C ± 2 K | ✓ Compliant |
| AHRI 550/590 | US/Global | Chiller efficiency rating | i Equipment selection |
Three steps.
Minutes, not days.
Type a zone. See the results. Export the cited PDF. We built Room Load Pro for engineers who'd rather be designing than reading manuals.
| Term | kW | % |
|---|---|---|
| Envelope | 0.67 | 11% |
| Solar gain | 3.17 | 52% |
| Internal sens. | 1.53 | 25% |
| Internal lat. | 0.73 | 12% |
| Total cooling | 6.10 | 100% |
Animated walkthrough · Open the real interactive app →
Animated walkthrough showing the three steps of the Room Load Pro workflow: inputs, results with diagrams, and the cited PDF report.
| Term | kW | % total |
|---|---|---|
| Envelope conduction | 0.38 | 11% |
| Solar gain (W glazing) | 1.77 | 52% |
| Internal sensible | 0.87 | 25% |
| Internal latent | 0.44 | 12% |
| Total cooling load | 6.10 | 100% |
| Supply airflow @ ΔT=11K | 391 L/s | — |
And here's what you send to the client.
Click Print Report in the live app and you get a one-page PDF like this. Inputs at the top. Methodology in the middle with the equation rendered. Results at the bottom with the standards cited inline. CSV and JSON exports too — for teams who script their own pipelines.
Two calculators.
Both work right now. Both are free.
Open one in your browser. Type your inputs. Copy the result. Methodology cited inline, regional standards stack of your choice. Eight more in build — we'll ship as they're ready. No "coming soon" countdowns we can't keep.
Air-state properties from any two inputs. Wet bulb, dew point, humidity ratio, enthalpy, density. Sea-level or altitude-corrected. ASHRAE Fundamentals 2021 correlations.
Single-zone cooling load with envelope, solar, internal sensible & latent, and supply airflow. Climate-zone aware. AIRAH DA09 methodology with cited results.
One tool today.
A working system, soon.
DENOVA is building what lives between the licensed desktop tools and the spreadsheets engineers can't audit. Browser-native. Methodology cited beside every result. Region-aware by default. Room Load Pro is the first one we've shipped publicly — the next is closer than it looks. We don't pre-announce.
Cooling load · psychrometrics · cited PDF report. Free. Runs in any browser.
What ships, ships. What doesn't, isn't ready yet. Subscribe to know when the next tool goes live. Read the manifesto →
Your reviewer doesn't accept "trust me." Neither should your software.
Trace 700, HAP, IES — they do the math correctly. The problem is they don't show it. When the peer reviewer asks "where did this come from?", you screenshot a dialog box. We render the equation, the variables, and the clause inline — beside the result that used it.
- 01Open math. Every equation is documented. No proprietary algorithms. No hidden coefficients.
- 02Inline citations. The PDF report cites the standard, the clause, and the table beside the result that used it.
- 03Versioned methodology. When standards change — NCC 2025 ships, ASHRAE 62.1 revises — your filed project locks to the methodology version it was filed under. Reproducible.
Like the Lite tools? Pro chains them
into a connected workflow.
Lite tools are standalone. Pro turns them into a connected workflow — capture project data once, every downstream tool reads from it, the report writes itself with citations attached. Two products are live in their Lite tier today: Room Load Pro and Psychrometrics Pro. The Pro tier launches with the full suite.
Room Load Pro
Cooling and heating loads at room and zone granularity. Climate-zone aware. AIRAH DA09 methodology with sensible / latent split. Lite version free.
Psychrometrics Pro
Air state analysis, mixing, coil processes. Multi-point state plotting, AHU process chains, ASHRAE Fundamentals correlations. Lite version free.
2 products live in Lite tier · Pro tier coming with the full suite Read the manifesto →
Four tiers. Start with Lite.
Lite is free, forever — no trial countdown. Pro is paid when it ships, for the deeper work that pays for itself. Pro covers a single Pro tool of your choice. Suite bundles every Pro tool at the best $/tool ratio. Enterprise adds your firm's branding on reports, custom templates, and API access. Self-serve through Suite. Enterprise is by quote.
- ✓All Lite calculators (2 live · 8 in build)
- ✓Methodology cited inline
- ✓Multi-region: ASHRAE · AS/NZS · CIBSE · EN
- ✓Branded one-page PDF
- ✓Quick sign-in (name + email)
- ✓One Pro tool of your choice
- ✓Multi-zone projects · unlimited history
- ✓Schedule export (CSV) + JSON
- ✓Methodology in every report
- ✓Email support
- ✓Every Pro tool — bundled
- ✓Cross-tool project workflows
- ✓Bulk pricing vs per-tool
- ✓Shared project library
- ✓Priority email support
- ✓Everything in Suite
- ✓Your firm's logo on reports
- ✓Custom report templates
- ✓API access for integrations
- ✓Dedicated onboarding
- ✓Manual invoicing / PO support
Pricing for Pro and Suite is finalized at launch. Pro and Suite subscriptions are subject to our Terms of Service and Privacy Policy. Enterprise terms are negotiated per engagement.
The old tools earned their place.
The world moved on.
In the 1990s, when Trace and HAP launched, the internet was a 56k modem and most engineering offices barely had one. Engineers worked at desks, on Windows PCs, with one tool installed per machine. Those tools held everything you needed — climate libraries, equipment data, calculation engines, all on the local hard drive. That was the only way to do engineering software in 1998. It worked. It powered millions of projects. It built the industry we work in today.
Then the world moved. The internet went from 56k to 5G. Engineers stopped working at one desk and started working in client meetings, on iPads, on the laptop in the hotel. Calculations stopped being one-engineer-and-done and started being reviewed by colleagues, juniors, the firm next year. Software changed too — SaaS replaced installs, web replaced desktop, cited sources replaced appendices. The way engineers work in 2026 isn't the way they worked in 1998.
DENOVA is what engineering software looks like when you start over for this context. Browser-native, so it opens anywhere a browser opens. Methodology cited inline, so the review can happen anywhere too. Modular, so you only learn what you need. Self-serve, so there's no procurement cycle between you and the calculation. Same engineering rigour as the desktop era. New context. New tools.
- Per-seat licences in the thousandsMulti-year contracts, procurement cycles, annual renewals. The cost showed up on the budget every year.
- Multi-day training coursesEngineers stayed at firms for decades. Long onboarding paid back. 200-page manuals were the norm.
- Windows-first, desktop installWindows was where engineers worked. License dongles, IT-managed install via SCCM, version-locked.
- Methodology in appendicesEngineering publishing convention. Reviewers had time to dig through separate documents.
- One regional standards stackProjects were geographically tighter. ASHRAE OR CIBSE OR AS, rarely all.
- Free Lite, open now. Pro coming soon.Self-serve subscription when it launches. No procurement. No salesperson. Cancel any time.
- Hours saved on day oneJunior engineers ship work the day they start. The methodology teaches as you compute — no manuals to read first.
- Browser-native, every deviceMac, Windows, iPad, Chromebook. Same URL, same calculation. Open it in a client meeting.
- Methodology cited inlineStandards clause beside the result that produced it. PDF, CSV, JSON exports carry the citation.
- Multi-region from day oneASHRAE · AS/NZS · CIBSE · EN. Switch regional stack per project.
The old tools do the math.
DENOVA helps you defend it.
Engineering software for engineers who'd rather be designing than chasing IT for licence approvals. We won't pretend AI is doing the engineering — the engineer is doing the engineering, the software is doing the typing. Below: what we set out to build, and why we think it matters.
DENOVA builds practical engineering software that makes technical work faster, clearer, more accurate, and more professional.
Become the global standard for browser-based engineering design tools — replacing legacy desktop software, one calculation at a time, with focused, modular, modern web tools that show their working.
Every calculation, formula, and standard reference must be defensible to a senior engineer. Aesthetics never compromise correctness.
We build features that solve real problems for working engineers — not features that sound impressive in a demo or a press release.
Every input, assumption, and output is visible, traceable, and reviewable. We never ship black-box calculations.
Every product is a building block. Tools work standalone, integrate as bundles, and compose into a complete engineering OS over time.
AI augments engineering judgment — it never replaces it. Every AI suggestion is visible, editable, and overridable.
The product looks and feels professional, but speaks plainly. No hype words, no AI buzzwords, no overselling.
The pattern repeats — tool after tool, until it adds up to a system.
Stop reading. Open it.
Room Load Pro is one click away. No install. Lite is free and open right now. Pro launches with the full suite — sign up to know when.
