PURE-Steam HVAC Coil Cleaning

Preparation

In preparation of the specialized coil cleaning process, the HVAC system specifications and details are analyzed. Depending on where the AHU is located we choose and deploy the specific equipment required for job. Then, as a licensed mechanical contractor we shut down the unit following all lockout and tag-out procedures. If the AHU is located in a Mechanical Room, before cleaning HVAC coils begins, a containment area is established to prevent steam and moisture from affecting the indoor environment. Next, all electrical components and ducts are masked to keep them dry during coil cleaning. Strict proprietary processes are adhered to throughout the entirety of the air handler cleaning procedure.

Testing

Pure Air Control Services Inc. specialty trained employees performs their own proprietary Coil Cleanliness Verification Test (CCVT) before coil cleaning begins. This is not outsources, our pro technicians repeat this test across the span of all of the HVAC coils in the scope, measuring the Delta P (ΔP) to determine which zones of the coil are most fouled. This is helpful to report the before state of the coil, as well as letting the tech know which areas of the coil will require the most attention. The data is logged and then cleaning commences. The PURE-Steam coiling cleaning process includes HVAC blower cleaning and AHU cleaning. Data gather in this step is utilized in the step: M&V Reporting.

Cleaning

The entire interior of the AHU is first HEPA vacuumed to remove built up debris, then a pre-steam enzyme treatment is applied to the coils. Next, the interior is steam cleaned top to bottom and the coils are worked with a precise method to ensure all debris is dislodged from deep inside fouled coils. Water extraction is maintained throughout the service. If necessary, the coils can be flushed with clean water at 50 gallons a minute. Another CCVT is performed to report the results of the coil cleaning. If an area still shows signs of fouling it’s reworked until clear. Finally, a post-steam Bioactive treatment is applied to help prevent coil fouling by inhibiting microbial growth for up to a year.

M&V Reporting

After the job is completed a detailed Measurement & Verification (M&V) Report is provided for each PURE-Steam cleaned AHU. This report contains before and after performance data recorded with the CCVT, a QA checklist of the job specification, a complete photo log, and recommendations for any additional issues that might still need to be addressed. This valuable, proprietary, report is a useful archive to track historical data on the equipment and is often referenced when considering future system maintenance. PURE-Steam is a long-term value adding, energy saving, air quality improving, contaminant eradicating, equipment life-extending service designed for largescale facilities like yours.