Mini Split Heat Pump Design in Ontario
PEO-stamped ductless and multi-zone heat pump designs — ASHRAE load calculations, indoor and outdoor unit placement, line set routing — delivered in 3–5 business days.
Get a Free QuoteWhat's Included
- ASHRAE load calculations for each conditioned zone
- Equipment sizing and selection per manufacturer performance data
- Indoor unit placement optimization for airflow coverage and aesthetics
- Outdoor unit placement with clearance, service access, and noise considerations
- Line set routing with insulation and support specifications
- Electrical load summary for panel sizing and circuit requirements
- Condensate drainage design and routing
- Stamped drawings for permit submission where required
Turnaround
3–5 business days from receipt of architectural drawings. Rush service is available for urgent projects.
Deliverables
- Stamped floor plan showing indoor unit locations and outdoor unit placement
- ASHRAE load calculation summary
- Equipment schedule with model numbers and performance ratings
- Line set routing diagram with insulation specs
- Electrical requirements summary (circuit size, disconnect requirements)
- Condensate drainage routing plan
Codes & Standards
- OBC 2024 Part 9 and Part 6 (where applicable)
- ASHRAE 62.2 — Ventilation for Acceptable Indoor Air Quality
- ASHRAE Fundamentals — Load Calculation methods
- CSA C22.1 — Canadian Electrical Code (electrical coordination)
- Manufacturer installation requirements (Mitsubishi, Daikin, LG, etc.)
Who This Is For
Homeowners adding cooling or supplemental heating to existing homes, builders incorporating ductless systems in new construction, and commercial tenants fitting out offices, clinics, or retail spaces where ductwork is impractical.
Frequently Asked Questions
Do mini split systems require a building permit in Ontario?
It depends on the municipality. Many Ontario building departments require a mechanical permit for mini split installations, particularly when the system serves as the primary heating or cooling source. We provide stamped drawings that satisfy permit requirements where needed.
Can a mini split heat pump work as the only heating system in Ontario winters?
Cold-climate mini splits (HSPF2-rated, rated to -25°C or below) can serve as primary heating in well-insulated Ontario homes. We evaluate your specific building envelope and climate zone to confirm whether a standalone heat pump system is appropriate or whether backup heat is advisable.
How many zones can a multi-zone system serve?
Most residential multi-zone outdoor units support 2 to 8 indoor units depending on the model and total connected capacity. We size the system so each zone's load matches the indoor unit's capacity at design conditions.
What's the difference between a single-zone and multi-zone design?
A single-zone system pairs one outdoor unit with one indoor unit. A multi-zone system connects one outdoor unit to multiple indoor units, each independently controlled. Multi-zone systems offer more flexibility but require careful load balancing to avoid performance issues.