HVAC, plumbing & hydronic design, engineered to pass.
AFZ Engineering delivers P.Eng.-sealed mechanical design for residential and commercial projects — precise load calculations, coordinated layouts, and thorough site reviews. Every drawing is built to code, and built to be approved.
Comprehensive mechanical engineering
From the first load calculation to the final sealed site review, we deliver every discipline your project needs to be approved and built.
Mechanical design, end to end
Everything your project needs to heat, cool, ventilate, and flow — calculated, drawn, and sealed by our team.
HVAC design
Load calculations, equipment selection, and coordinated air-side layouts for comfortable, code-compliant spaces.
- Heating & cooling load calculations
- Furnace, heat pump & AC design
- Duct layouts, sizing & diffuser plans
- Ventilation & HRV/ERV design
Plumbing design
Water supply and drainage sized and coordinated to the architectural set and issued for permit.
- DCW / DHW distribution design
- Hot-water recirculation
- Sanitary piping layout
- Fixture-unit calcs & riser diagrams
Hydronic & heating
Boiler and radiant heating designed and balanced to the building and its loads.
- 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
- NFPA 96 kitchen exhaust
- Permit & inspection support
New build & retrofit
Mechanical design for new construction and upgrades to existing building systems.
- New residential & commercial builds
- Retrofit & upgrade design
- Renovations, additions & retrofits
- System upgrades & CAD coordination
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.
Systems sized for the real building and a realistic budget — no over-design, no guesswork.
We confirm what gets installed matches what was designed, and document it properly.
Drawings coordinated onto the architectural set and delivered on a timeline you can plan around.
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.
Built to pass
Designed to the Ontario Building Code, ASHRAE, and CSA, and packaged for a clean permit and inspection.
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.
Designed to be approved.
We don't just design to code — we make sure your project passes.
Precise calculations, clean coordination, and drawings packaged the way reviewers expect — so your permit moves forward instead of stalling.
Air, water & heat
The three systems we design, and what each one covers.
Air
Load calculations, equipment selection, duct layouts, diffusers, ventilation and HRV/ERV design.
Water
Supply and drainage design, fixture-unit calcs, pipe sizing and riser diagrams.
Heat
Boiler and radiant design, in-floor and baseboard heating, zoning, pump sizing and controls.
From drawing set to sealed permit
A straightforward path with pricing agreed up front — no surprises between proposal and stamp.
Consult
We review your drawings and scope, talk through the requirements, and outline the right path forward.
Design
Load calcs, sizing, layouts, and schedules developed and coordinated with the architecture.
Stamp
P.Eng.-sealed drawings issued and packaged for permit submission.
Support
Site reviews, RFIs, and revisions carried through construction to close-out.
What you actually receive
Coordinated, stamped documents built to hand straight to the authority and the trades.
Air & ventilation
- Heating & cooling load calculations
- Equipment selection & mechanical schedules
- Duct layouts, sizing & diffuser plans
- Ventilation, HRV/ERV & exhaust design
- Sealed drawings for permit
Water & heat
- Supply & drainage design
- Fixture-unit & pipe sizing with riser diagrams
- Boiler, radiant & hydronic distribution
- Zoning, pump sizing & control sequences
- Site Review Reports through construction
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 projectTell 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