| # | Room | Type | Normal m³/h | Boost m³/h | Ducts | m³/h / duct | Duct status | ACH | Terminal m/s | Velocity |
|---|
| Duct ID | Room | Floor | Type | Dia (mm) | Run (m) | Inter-floor (m) | Bends | Normal m³/h | Boost m³/h | Boost vel. m/s | Boost ΔP (Pa) | Status |
|---|
| # | Item | Model / Spec | Qty | Unit | Notes |
|---|
Record measured airflows at commissioning. Supply and extract should each balance within ±5% of design. Adjust valves as required.
| # | Room | S / E | Design m³/h | Measured m³/h | Valve setting | Notes |
|---|
HiPer Studio · Passivhaus-aligned MVHR sizing for Australian high-performance homes
The HiPer Studio HiPer MVHR is a browser-based tool for sizing and documenting Mechanical Ventilation with Heat Recovery (MVHR) systems. It follows the Passivhaus Institute (PHI) three-criteria method, selects an appropriate unit, sizes individual duct runs, and produces a complete commissioning schedule.
All work auto-saves to your browser as named projects. No internet connection is required once the page is loaded.
| Tab | Purpose |
|---|---|
| 📐 Plan | Upload floor plan, draw building + rooms, place MVHR unit and grilles, auto-route ducts |
| 🏗 Project | Edit all design inputs: floor area, ceiling height, occupancy, duct settings, supply and extract rooms |
| 📊 Summary | Design airflow, unit selection, pressure loss and external grille summary — auto-updates as you draw |
| 🏠 Rooms | Room-by-room schedule showing flow rates, duct count, velocity and status |
| 🔩 Ducts | Individual duct run schedule with ID, length, velocity, pressure loss and status |
| 📋 BOM | Bill of materials — all ComfoTube, fittings and terminals required |
| ✅ Commission | Commissioning table ready to hand to the installer |
| ⚠️ Warnings | Design warnings, code issues and informational notes |
| ❓ Help | This manual |
| Control | Action |
|---|---|
| Dropdown | Switch between saved projects. Current project auto-saves on switch. |
| ✏️ Rename | Rename the current project. |
| ＋ New Project | Save current work, then open a blank project with empty plan and rooms. |
| ⧉ Copy | Duplicate the current project including plan drawing and all inputs. |
| 💾 Save | Explicit save — a ✓ Saved badge confirms. Auto-save also runs on every change (800ms debounce). |
The Plan tab is the primary input. Draw on your floor plan to populate the design automatically. Results update in the background as you work.
Drag and drop a PDF or image (JPG/PNG) onto the upload area, or click to browse. PDFs use the first page.
Click 📏 Scale. Click two known points on the plan, then enter the real-world distance in metres. All subsequent measurements use this reference.
Click 🏗 Building. Click each corner of the external perimeter. Close by clicking back on the first point (snap ring appears) or double-click. Floor area auto-fills in Project.
Click 🟢 Supply Room. Trace the polygon. A popup appears on completion — choose room type and name, then click Add Room. The room auto-populates the Project tab.
Click 🟠 Extract Room. Same as supply rooms. Extract rooms (kitchens, bathrooms, wet areas) are shown in orange.
Click ↔ V-Through for hallways and open-plan corridors. These show on the plan but don't create duct runs — they allow air transfer between spaces.
Click 🔵 MVHR Unit, then click the plant room location. Duct routes are auto-drawn to every supply and extract room immediately.
Click 🌬 Intake then click the external wall location. Click 💨 Exhaust for the exhaust outlet. Dashed external duct lines are drawn and lengths update automatically.
Click ⚡ Auto Route to regenerate all routes. Click any duct segment to insert a waypoint, then drag it to reroute. Waypoints snap to the unit and grilles.
Drag any outlet symbol within its room to the grille position. Click an outlet (without dragging) to toggle between ceiling-mounted and wall/bulkhead-mounted type.
| Button | Mode | Interaction |
|---|---|---|
| 📏 Scale | Two-point | Click 2 points → enter metres |
| 🏗 Building | Polygon | Click corners → close to snap ring or double-click |
| 🟢 Supply Room | Polygon | Click corners → popup to name room |
| 🟠 Extract Room | Polygon | Click corners → popup to name room |
| ↔ V-Through | Polygon | Click corners → popup to label zone |
| 🔵 MVHR Unit | Single click | Click to place — auto-routes all ducts |
| 🌬 Intake | Single click | Click external wall — auto-draws external duct |
| 💨 Exhaust | Single click | Click external wall — auto-draws external duct |
| ⚡ Auto Route | Action | Regenerates all duct routes |
| 🗑 Clear | Action | Confirm prompt clears all plan markup |
| Symbol | Meaning |
|---|---|
| Blue circle + 4 outward arrows | Ceiling-mounted supply grille |
| Red circle + 4 inward arrows | Ceiling-mounted extract grille |
| Blue rectangle + 3 upward arrows | Wall/bulkhead-mounted supply grille |
| Red rectangle + 3 downward arrows | Wall/bulkhead-mounted extract grille |
Design airflow is the maximum of three independently calculated values, per Passivhaus Institute protocol:
| Criterion | Formula | Typical governing scenario |
|---|---|---|
| Occupancy-based | Persons × 30 m³/h | Small, densely occupied homes |
| Extract demand | Sum of extract room defaults (kitchen 60, wet areas 40 each) | Homes with multiple wet areas |
| 0.3 ACH minimum | Floor area × ceiling height × 0.3 | Large, lightly occupied homes |
All ducts are DN90 (90mm) ComfoTube. Runs per room = ceil(normal flow ÷ 35 m³/h). At boost (1.3×), each DN90 carries up to 45.5 m³/h, keeping velocity below 2 m/s — the PHI limit for acceptable room noise.
| Status | Boost velocity | Meaning |
|---|---|---|
| Excellent | < 1.0 m/s | Very low velocity — may be oversized |
| Normal | 1.0–1.5 m/s | Comfortable operating range |
| High | 1.5–2.0 m/s | Acceptable — approaching PHI limit |
| Critical | > 2.0 m/s | Exceeds PHI limit — add a duct run |
| Room Type | Default m³/h | Type |
|---|---|---|
| Master Bedroom | 35 | Supply |
| Double Bedroom | 30 | Supply |
| Single Bedroom | 20 | Supply |
| Living Room | 40 | Supply |
| Rumpus Room | 30 | Supply |
| Dining Room | 25 | Supply |
| Study / Office | 20 | Supply |
| Kitchen | 60 | Extract |
| Bathroom / Ensuite | 40 | Extract |
| Laundry | 40 | Extract |
| WC | 20 | Extract |
| Pantry | 15 | Extract |
HiPer Studio Pty Ltd ("HiPer Studio") provides this software as a design assistance tool only. The outputs generated — including MVHR sizing calculations, unit selections, duct schedules, airflow schedules, pressure loss calculations, commissioning sheets, and design PDF reports — are indicative only and do not constitute professional engineering advice, certified design documentation, or a substitute for assessment by a licensed mechanical engineer.
By using this platform, you agree that:
Use of this platform constitutes your acceptance of these terms in full. If you do not accept these terms, do not use this platform.
HiPer Studio HiPer MVHR — Always have designs reviewed by a qualified mechanical engineer before installation.
PHPP10_ventilation_*.xlsx) to update the unit database.
Download the latest version from passivehouse.com.