Engineering Selection Software
Built by engineers. For engineers.
Clima International builds custom product selection software for HVAC manufacturers — precise calculations, real engineering, branded as yours.
What We Build
Engineering programs
built for your products
Coil Selection Engine
Water & DXFull coil selection from first principles. No lookup tables — the engine calculates tube-side and air-side heat transfer coefficients, iterates row-by-row, and selects minimum rows and circuits satisfying duty within the water pressure drop limit.
CALCULATION METHOD
Row-by-row EDT | Gnielinski (tube-side Hi) | Gray-Webb (air-side Ho)
Inputs
- →Airflow (L/s), OA DB/WB, duty (kW) or air-off target
- →Water in/out temps, max water ΔP (kPa)
- →Face geometry: fins high, finned length, FPI, tube OD
Outputs
- ←Rows, circuits, circuitry [1×19T]+[5×18T]
- ←Air-off DB/WB, SHR, condensate rate (L/min)
- ←Water flow (L/s), velocity, actual water ΔP
Fan Selection & Curve Matching
EC & ACFan curve interpolation and duty point matching across your entire product range. Engineers enter airflow and ESP — the software ranks every model by efficiency and plots the operating point.
CALCULATION METHOD
Cubic spline interpolation | System curve overlay | Duty point at curve intersection
Inputs
- →Airflow (L/s), external static pressure (Pa)
- →Air density correction for altitude and temperature
Outputs
- ←Matched models ranked by total efficiency
- ←Operating point: flow, pressure, power, efficiency
- ←Sound power Lw octave bands, LwA dB(A)
- ←Motor kW, FLA (A), electrical supply
Heat Exchanger Selection
Crossflow & CounterflowSensible and enthalpy HX sizing using NTU-ε method. Handles fixed plate (crossflow) and rotary wheel (counterflow). Calculates leaving conditions, frost risk, and condensate for winter.
CALCULATION METHOD
NTU-ε method | Crossflow unmixed-unmixed correction | Dew point frost check
Inputs
- →Supply airflow, OA and return air DB/WB
- →HX type: sensible plate / enthalpy wheel
- →Face dimensions, number of transfer units
Outputs
- ←Sensible effectiveness (%), latent effectiveness (%)
- ←Supply and exhaust leaving DB/WB
- ←Energy recovered (kW), frost risk flag
Compressor & Refrigeration
Vapour CompressionCompressor selection and full refrigeration cycle analysis. Maps performance across condensing and evaporating temperatures. Supports R410A, R32, R454B, R290.
CALCULATION METHOD
Vapour compression cycle | Compressor map interpolation | CoolProp refrigerant properties
Inputs
- →Required capacity (kW), evaporating and condensing temps
- →Refrigerant: R410A, R32, R454B, R290
Outputs
- ←Matched compressor, displacement (cc/rev)
- ←Actual capacity (kW), power input (kW), COP
- ←Mass flow (kg/s), suction/discharge conditions
Full Product Selection Suite
End-to-EndComplete branded selection tool. Engineer enters project details — location auto-fills ASHRAE climate data, airflows, design conditions — software selects the right model and generates a professional PDF submittal.
CALCULATION METHOD
ASHRAE climatic data (8,000+ locations) | Full psychrometrics via CoolProp | Auto model selection | Branded PDF generation
Inputs
- →Project: name, location (auto ASHRAE fill), engineer name
- →Summer/winter OA and return air DB/WB
- →Airflows (L/s), external static pressures (Pa)
Outputs
- ←Selected model, full performance at design conditions
- ←Fan curves with operating point plotted
- ←PDF: performance table, fan curves, sound data, dimensions
How It Works
From your product data to a
selection tool in weeks.
Your Product Data In
Fan curves, heat exchanger specs, performance maps, dimensional data. Everything about your product range goes into the engine — your models, your part numbers, your specs.
Real Engineering Calculations
The engine runs the physics — psychrometrics, heat transfer, fluid dynamics. Not lookup tables. The same calculations an engineer does by hand, in milliseconds, every time.
Branded as Yours
Your logo. Your colours. Your domain. It looks like it was built in-house. Engineers and contractors see your brand, not ours.
Professional PDF Output
Every selection generates a PDF technical submittal: performance data, fan curves, heat exchanger results, sound levels, dimensions, wiring diagrams. The document that wins specifications.
The engineering under the hood.
Every calculation method, every standard, every data source — built in.
─────────────────────────────────SELECTION RESULT — ERV-950-HEX─────────────────────────────────OA Flow Rate 950 L/sExt. Static 200 Pa─────────────────────────────────Summer OA 36.0°C DB / 20.0°C WBSummer Leaving 18.4°C DB / 17.1°C WBEffectiveness 73.2% sensible─────────────────────────────────Fan EC Plug × 1Motor Power 1.1 kWElectrical 415V / 3Ph / 50HzSound Level LwA 68.4 dB(A)─────────────────────────────────STATUS ✓ SELECTED
Who We Work With
Built for every customer
HVAC Manufacturers
What they need
- •Selection software covering their full range — all models, all configs
- •Tools that reduce quoting errors and engineer callbacks
- •A professional technical sales process
How we help
We build the selection engine around your specific product data. Your fan curves, your HX specs, your models. Everything calculated, nothing approximated.
OEM Distributors
What they need
- •Their own branded tool — not pointing back to the manufacturer
- •Their model numbers, their pricing structure
- •Fast response to engineer RFIs without involving the manufacturer
How we help
Full white-label. Your brand, your domain, your part numbers. Engineers never know who built the software.
Product Reps & Agents
What they need
- •Fast selection to win specs before competitors quote
- •Documents that hold up under engineering scrutiny
- •Tools that work in the field, offline
How we help
Desktop tools that run offline, generate PDFs instantly, and produce submittals that consulting engineers accept.
System Integrators & Consultants
What they need
- •Multi-product selection across full projects (20+ units)
- •Import from PDF mechanical specifications
- •Batch export for all units
How we help
AI-powered spec import — drop in the mechanical schedule PDF, the software reads it and pre-fills all selections. Run all 20 units in one click.
Why Clima
The Clima advantage
HVAC experience
Built by Engineers
Our team has real-world engineering experience. We understand the physics, the standards, and what your customers actually need from a selection tool.
White-label
Branded as Yours
Your logo, your colours, your domain. The software looks like it was built in-house — because it was built for you.
Typical delivery
Fast to Market
Most selection programs delivered in 6–10 weeks. We have proven engines for coils, fans, and heat exchangers — your product data goes in, branded software comes out.
Support & updates
Ongoing Support
As your product range grows, we update the software. New models, new features, continuous improvement.
Who We Are
Built by engineers,
for engineers
Clima International isn't just a software company — we're HVAC engineers who write code. We understand heat transfer, psychrometrics, fan laws, and refrigeration cycles because we've worked with them in the real world.
Based in Melbourne, Australia, we combine deep HVAC domain expertise with modern software engineering to build selection tools that manufacturers trust and engineers actually want to use.
Engineering Software for HVAC
Contact
Let's build
something great
Ready to transform your HVAC software experience? Tell us a little about your business and we'll come back to you with the right solution.
Location
Melbourne, Australia
info@climainternational.com
What happens next
We review your enquiry within 1 business day
A brief discovery call to understand your products
A tailored proposal with timeline and pricing