HVAC System Design —
Load to Layout
Complete HVAC engineering — from cooling and heating load calculations through equipment selection, ductwork sizing, and fully coordinated layout drawings.
Full-Scope HVAC System Design Service
Our HVAC system design service covers the complete engineering scope — from initial load analysis through to a construction-ready drawing and specification package. We design for all building types and system configurations.
Whether you need a simple split-system layout for a small office, a central chilled water plant for a commercial tower, or a GMP-compliant HVAC system for a pharmaceutical facility, our engineers bring 30+ years of real-project experience to your design.
Systems We Design
- Central chilled water plant (air-cooled / water-cooled chillers)
- VRF / VRV multi-split systems
- Air handling units (AHUs) with ductwork distribution
- Fan coil unit (FCU) systems
- Precision cooling for server rooms & data centres
- GMP HVAC for pharmaceutical & cleanroom environments
- Split and cassette systems for smaller applications
- Ventilation and heat recovery systems
- Kitchen exhaust and make-up air systems
What's Included in an HVAC Design Package
Load Calculation Report
Room-by-room ASHRAE / CIBSE cooling and heating load analysis with equipment sizing guidance.
Equipment Schedule
Complete equipment schedule — chillers, cooling towers, AHUs, FCUs, VRF outdoor/indoor units — with capacities, model references, and electrical data.
Ductwork Design & Sizing
Duct sizing calculations (equal friction or velocity method), duct layout plans, and diffuser schedule with airflow rates.
Piping Schematics
Chilled water and condenser water piping schematics, pump selection, expansion vessels, and control valve schedule.
Layout & Coordination Drawings
AutoCAD or Revit layout plans showing equipment, ductwork, and pipework — coordinated with architectural and structural backgrounds.
Design Basis & Specification
Written design basis document and technical specification for inclusion in tender packages or authority submissions.
HVAC Designs Proven in the Field
Green Power Corporation doesn't just design HVAC systems on paper — we have installed and commissioned them in some of Pakistan's most demanding projects, including Islamabad International Airport, pharmaceutical manufacturing facilities requiring GMP compliance, and major hospital campuses where system reliability is life-critical.
That site experience means our designs are buildable, our equipment selections are realistic, and our drawings contain the detail a contractor actually needs. Remote clients get designs that work, not just documents that satisfy a submission.
View HVAC Project Portfolio →Standards We Apply
ASHRAE 62.1 (ventilation) · ASHRAE 90.1 (energy) · ASHRAE Handbook — HVAC Systems & Equipment · CIBSE Guide A & B · Local authority requirements
Software Used
HAP (Carrier Hourly Analysis Program) · AutoCAD MEP · Revit MEP · Hevacomp · Manual duct sizing calculations
Typical Turnaround
Concept design: 3–5 days · Full design package: 2–4 weeks depending on scope · Timeline confirmed at quoting stage
Related Services
HVAC Load Calculation Service →
Every HVAC system design starts with an accurate load calculation. Our standalone cooling and heating load calculation service produces ASHRAE or CIBSE-compliant reports — or it can be bundled with the full system design.
AutoCAD & Revit MEP Drawings →
Need the HVAC system design translated into construction drawings? Our AutoCAD and Revit MEP drawing service produces professionally layered layouts, schematics, and as-builts ready for contractor tendering.
Commission Your HVAC System Design
Tell us your project type, building size, and location. We'll scope and price the design within 24 hours.