Residential
Homes, additions & multi-unit
Comfortable, coordinated systems for new construction, renovations, secondary suites, and custom homes.
Ontario Mechanical Engineering
Permit-ready HVAC, plumbing & hydronic design for residential & commercial projects.
P.Eng.-sealed mechanical drawings, code-compliant calculations, and practical system designs for projects across Ontario. From early coordination through permit submission, we help keep your project efficient, buildable, and ready for approval.
P.Eng.-sealed drawings
Ontario Building Code
ASHRAE-informed design
CSA and NFPA standards
Residential and commercial
P.Eng.-sealedPermit-ready drawings
ResponsiveProject delivery
3 core disciplinesHVAC · Plumbing · Hydronic
Free initial consultStart with a project review
Services
Mechanical design, end to end
Every mechanical discipline your project needs — calculated, drawn, and sealed by a licensed engineer.
HVAC design
Heating, cooling, and ventilation for homes and commercial spaces — load calculations, equipment selection, and coordinated duct layouts.
- Heating & cooling load calculations
- Furnace, heat pump & AC design
- Ventilation, HRV/ERV & exhaust
- Rooftop & split-system design
Plumbing design
Water supply, drainage, and venting — fixture-unit calculations, pipe sizing, and riser diagrams issued for permit.
- DCW / DHW distribution design
- Hot-water recirculation
- Sanitary piping layout
- Fixture-unit calcs & riser diagrams
Hydronic & heating
Boiler and radiant systems — in-floor and baseboard heating, zoning, pump sizing, and controls balanced to the load.
- Boiler & radiant heating design
- Hydronic distribution & zoning
- Pump & pipe sizing
- In-floor & baseboard heating
Site review reports
Stamped field reviews documenting conformance to the design throughout construction.
- General & final field reviews
- Stamped Site Review Reports (SRR)
- Deficiency lists & follow-up
- Occupancy & sign-off support
Code & energy compliance
Design and documentation to carry a project cleanly through permit and inspection.
- Ontario Building Code compliance
- ASHRAE & CSA design standards
- SB-10 / SB-12 energy compliance
- Permit & inspection support
Kitchen exhaust & make-up air
Type I & II hood systems for restaurants and commercial kitchens — exhaust, make-up air, and code-compliant fire safety.
- NFPA 96 hood & exhaust design
- Make-up air (MUA) sizing
- Exhaust fan & duct routing
- Fire-suppression coordination
Built to codeOBC · ASHRAE · CSA · NFPA 96
Our approach
Discuss your project
A practical approach to every project
We start by understanding your project — the scope, the constraints, and what you're trying to achieve — then map out the right approach. Every solution has to function, pass, and be affordable to build.
01
Practical design with accurate budgets
Systems sized for the real building and a realistic budget — no over-design, no guesswork.
02
Site reviews through construction
We confirm what gets installed matches what was designed, and document it properly.
03
Coordination and scheduling
Drawings coordinated onto the architectural set and delivered on a timeline you can plan around.
Project types
Mechanical engineering across the built environment
From custom homes to commercial facilities and existing-building upgrades, the same practical engineering approach carries through.
Commercial
Offices, retail & light industrial
Permit-ready mechanical design that balances occupancy, code, equipment, and constructability.
Existing buildings
Renovations, retrofits & upgrades
Replacement systems and coordinated modifications that work within real existing-building constraints.
Why AFZ
What sets AFZ apart
Expert mechanical design, delivered with a level of personal attention larger firms can't match.
Direct access to your engineer
You work directly with the P.Eng. responsible for your design — for feedback, questions, and straight answers. No call centres, no handoffs.
Code-compliant & efficient
Designed to the Ontario Building Code, ASHRAE, and CSA — efficient systems, coordinated drawings, and clean permit documentation.
Quality over volume
We take on work we can do exceptionally well, and give every project the attention it deserves.
Responsive and reliable
Reach out and you'll get a real response from an engineer — clear guidance on scope, code, and next steps, without the wait.
Beyond code compliance.
We don't just meet code — we design efficient, practical systems that build clean and run right.
Precise calculations, clean coordination, and drawings packaged the way reviewers expect — so your permit moves forward, and the finished system performs.
Process
From drawing set to sealed permit
A straightforward path with pricing agreed up front — no surprises between proposal and stamp.
1
Consult
We review your drawings, scope, and site to understand the project and confirm what the municipality will require.
2
Proposal
A clear scope and fee — what we'll deliver, and the price, agreed up front before any work begins.
3
Calculate
Heat-loss and load calculations, ventilation rates, and fixture and pipe sizing to code.
4
Design
Layouts, equipment selection, and schedules — coordinated with the architecture and structure.
5
Stamp
P.Eng.-sealed drawings and summary forms issued and packaged for permit submission.
6
Permit
We respond to municipal plan-review comments and resolve conditions to get your permit issued.
7
Support
Site reviews, RFIs, and revisions carried through construction to occupancy and close-out.
Deliverables
What you actually receive
Coordinated, stamped documents built to hand straight to the authority and the trades.
Sealed drawing set
P.Eng.-stamped mechanical plans — layouts, riser diagrams, and details, coordinated onto the architectural set.
Sealed · PDF + DWGEquipment schedules
Every specified unit in one place — furnaces, heat pumps, HRV/ERV, pumps, boilers, and fixtures with the data the trades need to order and install.
SchedulesLoad calculation report
Heat-loss and heat-gain calculations backing every equipment size on the drawings, for residential and commercial projects.
Load reportVentilation design summary
Ventilation designed and summarized to code — the MVDS for residential permits, or ASHRAE 62.1 rate calculations for commercial projects.
MVDS / ASHRAE 62.1Site Review Reports
Stamped field reviews issued through construction, confirming the installation matches the sealed design.
SRR seriesPermit package
The full submission assembled and ready — drawings, schedules, calculations, and summary forms as one coordinated set.
Submission-readyEvery project designed to
Recognized codes & standards
Ontario Building Code
ASHRAE
CSA
NFPA 96
Let's talk
Have a project in mind? Let's talk it through.
Send your drawings, or just tell us what you're planning. We'll help you understand what's involved, what the code requires, and how we can help.
Discuss your project
Start a project
Tell us about your project
Share your drawings, or just tell us what you're planning. We'll help you understand the scope, the code requirements, and how we can support your project.
- Clear, transparent pricing
- Permit-ready, P.Eng.-sealed deliverables
- Work directly with your engineer