Ventilation & HRV/ERV Design in Ontario
CSA F326 compliant fully ducted HRV and ERV system designs — duct layout, airflow balancing, HVI-rated equipment selection — stamped by a PEO-licensed engineer in 3–5 business days.
Get a Free QuoteWhat's Included
- CSA F326 Residential Mechanical Ventilation Design Summary preparation
- Principal exhaust and supply airflow requirements calculated per OBC
- Fully ducted HRV/ERV layout with dedicated exhaust picks and supply outlets
- HVI-certified equipment selection matched to airflow and efficiency requirements
- Duct sizing for balanced system operation
- Defrost control and drainage specifications for Ontario climates
- System balancing report for contractor commissioning
- Stamped drawings and compliance documentation for permit submission
Turnaround
3–5 business days from receipt of architectural drawings. Rush service is available for urgent projects.
Deliverables
- Stamped HRV/ERV duct layout drawing (PDF)
- CSA F326 Residential Mechanical Ventilation Design Summary
- Equipment schedule with HVI ratings and model selection
- Airflow balancing report
- OBC 9.32 compliance checklist
Codes & Standards
- OBC 2024 — Section 9.32 — Ventilation
- CSA F326-M91 — Residential Mechanical Ventilation Systems
- ASHRAE 62.2 — Ventilation for Acceptable Indoor Air Quality in Residential Buildings
- HVI Certified Products Directory (for equipment selection)
Who This Is For
Ontario homebuilders and architects designing new homes where OBC requires mechanical ventilation. Also suitable for renovation projects upgrading from exhaust-only ventilation to a full HRV system, and for projects combining HRV with radiant or ductless heating systems.
Frequently Asked Questions
When is an HRV required under the Ontario Building Code?
OBC 2024 Section 9.32 requires mechanical ventilation in all new residential construction. A fully ducted HRV system is the most common compliance path. Specific airflow requirements depend on conditioned floor area and number of bedrooms.
What's the difference between an HRV and an ERV?
Both recover heat from exhaust air to pre-condition incoming fresh air. An HRV (Heat Recovery Ventilator) transfers heat only. An ERV (Energy Recovery Ventilator) transfers both heat and moisture, which can be advantageous in very cold or very humid climates. For most Ontario applications, HRVs are standard.
Does the HRV design need to be coordinated with the forced air system?
Yes. When an HRV is integrated with a forced air system, the supply and exhaust duct connections need to be carefully coordinated to avoid short-circuiting. We design both systems together in a coordinated package to ensure they work correctly.
Can you design a standalone HRV system without a forced air furnace?
Absolutely. We design fully ducted standalone HRV systems with dedicated supply and exhaust ductwork for homes using radiant heat, mini splits, or other ductless systems as the primary heat source.