How to design a heat recovery ventilation system
It is useful to plan ventilation before buying equipment or starting installation. Start with building data, plan airflow, and only then design the duct routes.
Prepare your layoutWhat you get
- define room functions and layout
- plan supply and extract airflow
- place ventilation points
- check duct routes
1. Prepare the room layout
Collect dimensions, room heights, use, occupancy and information about doors and windows.
2. Set airflow values
Supply and extract rooms should form a consistent balance. This is the basis for placing ventilation points.
3. Plan the ducts
After deciding where the ventilation points go, plan duct routes around the building structure and available space.
A project checklist
- 1Collect plans, dimensions, heights and room uses.
- 2Set airflow and check supply-extract balance.
- 3Review clearances, windows, doors and available duct routes.
Example use case
Example: in a detached house, separate supply and extract rooms first, place vents next, and plan duct routes only after the airflow concept is clear.
Concept design versus construction design
The tool helps organize a concept. A construction design must account for actual structure, equipment, regulations and review by a qualified professional.
Frequently asked questions
Can I start without a finished building design?
You can prepare an initial concept, but a final design should reflect the actual building conditions.
Where should I start when designing an HRV system?
Start with an accurate room layout and room functions. Then set airflow, place ventilation points and plan duct routes.