Illustrative Planning Ranges & Scoping Envelopes
Clear, measurement-grounded planning bands for Winnipeg and Red River Basin properties. Pureflow Air provides independent hourly and fixed-envelope advisory services—never equipment mark-ups. All ranges represent demonstrative planning assumptions based on physical square footage, duct complexity, and field logging intervals.
Instrumentation logged to NIST standards before sub-zero transit. All airflow traverses reference to local atmospheric air density (ρ ≈ 1.29 kg/m³ @ -20°C).
WEBSITE DEMONSTRATION NOTICE: All pricing models and sample ranges displayed below are illustrative demonstration examples for planning discussions and do not constitute binding quotes or formal commercial bids. Formal proposals issue after architectural mechanical schedules or intake questionnaires are reviewed.
Standard Field Envelopes
Scope Level I
Residential IAQ & HRV Diagnostic
Single-dwelling homes, modern airtight builds, or retrofitted envelopes encountering winter dryness or window moisture.
Digital Micro-Manometer, Pitot Tube Array, Core Temp/RH Dataloggers.
- HRV/ERV core balanced CFM intake vs. exhaust verification.
- Total external static duct resistance check (ESP).
- Winter indoor safe relative humidity target limits table.
- Sub-zero defrost cycle thermal efficiency verification.
Scope Level II
Comprehensive Distribution & Duct Audit
Multi-storey homes, hot/cold room variances, whistling grilles, post-renovation heating deficits, or particulate infiltration.
Direct-capture Electronic Balometer Hood, Optical Particle Counter, Multi-point CO₂ telemetry.
- Complete register-by-register CFM distribution traverse map.
- MERV 13 filtration drop simulation & blower motor safety check.
- Attic plenum bypass & envelope duct leakage calculation.
- Contractor-ready duct alteration schematic with damper notes.
Scope Level III
Commercial Suite & DOAS Commissioning
Medical clinics, design studios, light commercial suites (up to 8,000 sq.ft), or tenants needing ASHRAE 62.1 outdoor air validation.
Multi-gas Photoionization Detector, High-Volume Traverse Hood, Static Array.
- ASHRAE Standard 62.1 outdoor airflow rate balance schedule.
- Peak-occupancy CO₂ accumulation & purging telemetry review.
- Exhaust-to-supply envelope pressurization check (smell/cold drafts).
- Formal IAQ verification stamp letter for tenant leases.
Interactive Scoping Envelope Calculator
Adjust architectural variables to preview anticipated engineering site time, instrumentation protocols, and planning financial envelopes.
Independent advisory rate baseline. No contingency equipment commissions.
Scope Attribute Matrix
Detailed breakdown of field engineering protocols, instrumentation, and deliverables associated with each Pureflow Air engagement level.
| Diagnostic Parameter | Scope I: Residential IAQ | Scope II: Duct Audit | Scope III: Commercial DOAS |
|---|---|---|---|
| Target Footprint | Up to 2,200 sq.ft | 1,500 – 4,500 sq.ft | Up to 8,000+ sq.ft |
| Field On-Site Hours | 2.5 – 3.5 Hours | 4.5 – 6.0 Hours | Full Working Day (8h+) |
| CFM Airflow Measurement | Supply & Exhaust Core only | All Grilles & Floor Boots | Full Duct Traverse & Diffusers |
| Particulate & Aerosol IAQ | Spot check (PM2.5 / PM10) | Multi-point PM0.3–PM10 + CO₂ | Continuous PID (VOCs, CO, CO₂, PM) |
| Static Pressure Testing | Total External Static (ESP) | Trunk drop, Filter drop, Coil drop | Static array across VAV boxes & DOAS |
| Sub-Zero Heat Recovery Check | Core temperature verification | Sensible/Latent efficiency ratio | Full psychrometric enthalpy calculation |
| Deliverable Format | 4-page Diagnostic Summary | Architectural Atlas & Schematic | Stamped P.Eng Compliance Dossier |
Common Scoping & Engagement Questions
Everything you need to know about our field presence, professional independence, and mechanical engineering ethics.
How does Pureflow Air structure advisory invoicing?
We operate exclusively on fixed-envelope advisory agreements or clear hourly consulting contracts. Prior to setting foot on-site, you receive a scoped confirmation memo outlining the maximum hours and required deliverables. We do not bill unexpected overages: if diagnostic logging runs longer due to our test protocols, you pay the agreed envelope.
Do you service properties outside of the Winnipeg Perimeter Highway?
Yes. We regularly dispatch across the Red River Valley, Selkirk, Steinbach, Brandon, and Interlake regional districts. Travel within the Winnipeg metropolitan area is included in the baseline scope envelope. For regional rural properties beyond 40 km from Portage & Main, a flat CRA mileage rate is transparently appended to cover vehicle mobilization and thermal sensor stabilization time.
Why do you strictly refrain from selling HVAC units or filters?
Independence is the bedrock of credible indoor air quality physics. If an auditor profits from selling you a $9,000 new furnace or proprietary duct lining, their measurements are inherently biased toward replacement. Pureflow Air sells only scientific measurements, psychrometric diagrams, and independent verification. You receive an objective engineering blueprint you can hand to any qualified mechanical contractor for honest quotes.
How do you collaborate with my existing mechanical installer or HVAC contractor?
Rather than being adversarial, high-calibre heating and sheet metal technicians welcome our reports. Contractors frequently lack the time or reference flow hoods to spend 4 hours balancing 18 individual dampers. Our reports deliver a clear, mathematically validated schedule of damper adjustments, duct enlargement cross-sections, and blower speed settings, saving trades hours of troubleshooting.
What preparation is needed on-site before your diagnostic traverse?
We request that all exterior windows, doors, and fireplace dampers remain closed for at least 6 hours prior to testing to simulate normal winter envelope pressurization. Clear access (minimum 3 ft perimeter) is required around the main furnace plenum, HRV/ERV unit, and primary return trunks. All supply grilles in tested rooms must be unobstructed by heavy furnishings.
Conflict-of-Interest note
Every diagnostic run adheres to the Code of Ethics of the Association of Professional Engineers and Geoscientists of Manitoba (Engineers Geoscientists Manitoba).
Ready to benchmark your indoor air velocity?
Reach our Winnipeg lab with your mechanical floor plans, HRV serial tag, or known temperature differential zones. We provide confirmed scoping estimates within one business day.