Ventilation, Filtration & Airflow Engineering Services
Independent advisory engineering for prairie building envelopes navigating sub-zero temperature gradients, seasonal wildfire plume infiltration, and positive-pressure envelope dynamics. Pureflow Air acts solely as an unbiased consulting authority—we do not sell mechanical equipment or claim universal remediation.
Systematic Envelope & Mechanical Advisory
Each scope provides thorough, non-commercial documentation designed to interface directly with mechanical engineers, general contractors, and jurisdictional authorities.
Ventilation Review & Core Balancing
HRV / ERV SENSIBLE RECOVERY & DEFROST STAGINGPrairie winter conditions present destructive thermal tensions across balanced ventilation cores. When outdoor temperatures drop past -25°C, moisture freezing inside the exhaust matrix requires precise frost-control dampers or recirculation cycles. We quantify real-time sensible heat recovery efficiency, establish neutral building static equilibrium to prevent moisture-laden air from penetrating exterior envelope framing, and audit intake hoods against blizzard snowdrifts.
Filtration Strategy & Particle Resistance
MERV 11 TO 14 EVALUATION VS HEPA BLOWER STATIC LIMITSElevating residential or light commercial filtration to counter summer wildfire smoke plumes frequently suffocates standard ECM air handlers. Installing deep HEPA cartridges without duct modification creates excessive static backpressure, stalling heat exchangers and burning out fan motors. We audit your blower fan curve against clean vs loaded filter resistance to identify the exact filter media thickness, face velocity, and bypass damper architecture suitable for seasonal switching.
Airflow Context & Ductwork Static Analysis
PITOT-TUBE TRAVERSE LOGGING & DAMPER BALANCINGThermal starvation on second storeys and disruptive register turbulence are rarely resolved by simply turning up the blower speed—in fact, doing so exacerbates duct hiss and accelerates envelope duct leakage. We perform rigorous multi-traverse duct velocity calculations using precision differential pressure probes, diagnosing bottleneck elbows, unsealed flex-duct transitions, and pinched return airways.
Eliminates audible register whistle through damper adjustment.
Re-indexes supply trunk split fractions to equalize vertical thermal stacks.
Prevents pressurized unconditioned plenum leakage.
Seasonal Protocols & Psychrometric Defrost Management
DEEP WINTER RH DEPRESSION & SUMMER DEW POINT DECOUPLINGWhen extreme continental cold pushes outdoor moisture capacity below 1.0 g/kg of dry air, unreference continuous mechanical ventilation rapidly depresses indoor relative humidity below 18%, provoking respiratory discomfort and wood finish shrinkage. Conversely, excessive humidification drives interstitial condensation at window framing corners and unsealed attic penetrations. We map safe psychrometric boundaries reference against window U-values and outdoor temperatures.
At -30°C outdoor ambient, standard double-glazed windows experience edge perimeter condensation if indoor humidity exceeds 22%. Triple-glazed assemblies (Low-E argon) allow up to 32% indoor RH before edge frosting. Our advisory models prevent structural rot behind vapor barriers.
Maintenance & Equipment Coordination
INDEPENDENT COMMISSIONING & MECHANICAL SCHEDULE LIAISONWe bridge the gap between architectural plans and physical mechanical installations. Because Pureflow Air does not sell equipment or execute sheet metal fabrication, trades welcome our technical verification as clear, third-party sign-off. We verify mechanical schedules, conduct pre-occupancy airflow balances, and issue illustrative engineering compliance records for occupancy permits.
Compare Engineering Scopes & Deliverables
Filter advisory deliverables based on building archetype, occupancy density, and envelope age across the Manitoba region.
Comprehensive Envelope IAQ Audit
Designed for new high-performance prairie residential builds (R-40+ roofs, triple-pane glass) or major retrofits encountering mysterious window condensation, register roar, or uneven room temperatures.
Unbiased Consulting Authority. No Hardware Sales.
We do not endorse unscientific ionization hardware, promise allergy treatment, or sell HVAC inventory. Our revenue stems exclusively from qualified engineering hours and calibration testing. If your existing duct network is adequate, we tell you immediately without upselling replacement equipment.
Discuss an air-quality scope for your facility
Reach our Winnipeg engineering desk to request a diagnostic field traverse, mechanical schedule review, or CAN/CSA F326 ventilation balance Illustrative Record.