The majority of duct cleaning companies in New Mexico use high-powered truck-mount vacuum systems and pneumatic agitation tools originally engineered for rigid sheet-metal ductwork. These systems routinely generate negative pressures of 3–8 inches of water column (IWC) — three to eight times the maximum pressure tolerance of standard residential flex duct.
The result is invisible but cumulative: the inner liner of flex duct collapses, tears, or separates from the outer jacket. Insulation is compressed. Airflow is permanently reduced. Mold-trapping crevices form at collapse points. In many cases, the cleaning itself causes more long-term damage than the contamination it was meant to remove.
EnviroFlow™ LPS was engineered specifically to solve this problem — delivering the agitation and extraction needed for effective cleaning while staying within the pressure envelope that flex duct manufacturers specify.
IWC = inches of water column. Standard pressure unit for HVAC duct systems. Source: SMACNA Flexible Duct Performance & Installation Standards, 4th Ed.; ACCA Manual D.
Five stages, each engineered to maximize particulate removal while maintaining pressure within manufacturer tolerances.
AirVerify™ real-time air quality testing captures a timestamped baseline reading for all 6 parameters before any work begins. This is your before-state evidence.
Proprietary low-pressure air whips and soft-bristle contact tools dislodge particulate from duct walls at ≤1 IWC — within flex duct manufacturer tolerances.
A regulated HEPA-filtered extraction unit removes dislodged particulate. Pressure is continuously monitored and maintained below the 1 IWC threshold.
All supply and return registers, grilles, and accessible components are cleaned and sanitized. Ductoscope video documents each duct run before and after.
AirVerify™ captures post-clean readings for all 6 parameters. The delta (improvement) is calculated, and your signed Certificate of Completion is issued on-site.
Over 80% of New Mexico residential HVAC systems use flexible ductwork. Every one of them has a pressure limit. Exceeding it causes damage that is invisible, cumulative, and permanent.
High negative pressure causes the inner mylar liner of flex duct to collapse inward, permanently reducing the duct's cross-sectional area and airflow capacity by up to 40%.
Excessive pressure compresses the fiberglass insulation blanket surrounding the inner liner, reducing its R-value and increasing heat gain/loss — raising your energy bills permanently.
When the inner liner tears or separates from the outer jacket, moisture from the surrounding air can enter the insulation layer — creating ideal conditions for mold growth inside the duct wall.
All major flex duct manufacturers (Thermaflex, Flexmaster, Atco) specify maximum operating pressures. Cleaning with equipment that exceeds these limits voids the manufacturer warranty on the ductwork.
NADCA's Assessment, Cleaning, and Restoration (ACR) standard requires that cleaning equipment be appropriate for the duct material being cleaned. High-pressure equipment is not appropriate for flex duct.
Homeowners and property managers who can demonstrate that a duct cleaning company caused flex duct damage have successfully pursued claims for replacement costs. EnviroFlow™ LPS eliminates this risk.
| Feature | EnviroFlow™ LPS | High-Power Truck Mount |
|---|---|---|
| Operating pressure | ≤ 1.0 IWC (controlled) | 3–8 IWC (uncontrolled) |
| Flex duct safe | Yes — within manufacturer spec | No — exceeds tolerance |
| Manufacturer warranty preserved | Yes | Often voided |
| NADCA ACR compliant | Yes | Depends on operator |
| Pressure monitoring | Continuous, real-time | Typically none |
| Before/after verification | AirVerify™ — 6 parameters, real-time | None standard |
| Ductoscope video documentation | Every duct run, included | Rare — extra charge |
| Suitable for rigid sheet metal | Yes | Yes |
| Suitable for flex duct | Yes — purpose-built | Risk of damage |
| Suitable for fiberglass duct board | Yes — low-pressure safe | Risk of delamination |
| Certificate of Completion issued | Yes — signed, timestamped | No standard document |
| Court-admissible output | Yes — chain-of-custody timestamp | No |
Assessment, Cleaning, and Restoration of HVAC Systems. EnviroFlow™ LPS meets all equipment and procedural requirements for flex duct cleaning.
EnviroFlow™ LPS operating pressure of ≤1 IWC is within the pressure tolerances specified for all Class 1 flexible air ducts.
EnviroFlow™ LPS pressure parameters are consistent with ACCA Manual D design pressures for residential flex duct systems.
AirVerify™ post-clean readings are compared against ASHRAE 62.1 reference levels for airborne contaminants, providing compliance documentation.
VOC and particulate readings from AirVerify™ are benchmarked against EPA indoor air quality reference concentrations.
For commercial and healthcare applications, AirVerify™ readings are compared against OSHA permissible exposure limits (PELs) for relevant compounds.
Every EnviroFlow™ LPS job includes AirVerify™ before-and-after verification, ductoscope video documentation, and a signed Certificate of Completion. Book your free assessment today.