HVAC Duct & System Cleaning

Cleaning of an HVAC system is one of the best ways to improve indoor air quality and system performance. Our services will deliver a cleaner and more comfortable environment. Our advanced methods of cleaning remove dirt, dust, lint, mold, mildew, fungi or bacteria that are possibly being dispersed in to the areas served by the system, and will produce a cleaner and more comfortable environment in your facility.

At Guardian Services, we evaluate your kitchen with an onsite survey, including hood vent cleaning inspection. During our onsite survey, we inspect your entire kitchen, prescribe a comprehensive solution and also provide you with the estimated cost for HVAC duct and system cleaning.

Cooling Tower Cleaning

 Why it’s cleaned

According to the Environmental Protection Agency, Indoor pollutant levels may be 10 to 100 times higher than outdoor concentrations. These indoor pollutants come from a variety of sources, including occupants, production activities, furniture, cleaning activities, and outdoor air. HVAC systems can distribute these pollutants and are a perfect breeding ground for biological contaminants, including mold, but cleaning your system will remove these contaminants before they enter the air you breath. A clean HVAC system may also perform at a greater level of efficiency and require less energy to function properly, which can lead to improved environmental comfort control, longer equipment life and reduced electricity costs.

 When Should an HVAC System Cleaned?

A system needs to be cleaned when a significant amount of debris or microbial growth is observed, the system discharges visible particulates or equipment is determined to have blockages that may cause performance to suffer. Guardian performs free, photo documented, inspections for all customers and has certified air system cleaning specialists on staff to help you determine if you or your system can benefit from cleaning. The National Air Duct Cleaning Association has created a guide and checklist for customers considering cleaning their systems. It can be found here.

HVAC Duct System Before CleaningHVAC Commercial Plenum BeforeHVAC Commercial Plenum After Cleaning

 Our Survey and Quote Process

We start each quote request with a thorough on site survey of the equipment requiring service. Our senior field supervisors have over 30 years combined experience in HVAC system cleaning and will photo document what they find during the course of the survey. The information collected during the survey will be brought back to the office and formatted into a comprehensive quote detailing our findings, recommended services, service time frame and materials, and pricing. The survey photos will also be included with the quote to insure that you have the most detailed information possible to make a decision regarding the service of your systems. A sample survey photo report can be found here.

Cleaning Processes

Guardian uses the National Air Duct Cleaning Association’s prescribed cleaning techniques to perform a total HVAC system clean. This includes using “source removal” methods to manually clean the air conditioning unit housing (indoor and outdoor), all ductwork, fans, coils, drip pans, grills and diffusers. We offer pneumatic and the newest cleaning method, Dry Ice Blasting. Both methods are proven to deliver consistent, high quality removal of system contaminants and debris without damage to mechanical components.

Pneumatic Cleaning  

Our technicians access the system through code compliant access points and use agitation devices such as air whips and brushes to remove contaminants. We then use HEPA-filtered vacuums with direct contact to the ductwork to collect and remove contaminants.

Approach and Project Management

Guardian’s cleaning process begins with a system assessment to determine the best cleaning methods to use in order to protect the building occupants and equipment. Protective plastic sheeting is used to cover all vulnerable surfaces. All access points are re-sealed, per code, the system’s performance is checked and our technicians remove all the protective covers. Photo documentation is provided for all projects to document the before and after condition of the system and ensure all areas are properly serviced. Additional cleanliness testing can be performed where required. All Guardian customers will be given access to our customer portal system. The portal is open 24/7 for customers to access their documentation, scheduling, and photos. 

Portal Sample Screen Capture

A sample customer from Guardian’s Portal System 

Restoration: Sealing and Treatments

As HVAC systems age, there will be events which occur within the duct and units which can lead to water damage to insulation, or buildup of biological contaminants. In order to restore the system to its designed status, cleaning alone may be insufficient.  Guardian’s technicians are experienced in the application of specific coatings and treatments which can not only repair the damage which has occurred in the system, but can also PREVENT future damage.  There is no “One size fits all” solution to these issues, which is why our project managers are prepared to design a custom solution for each customer which addresses the facilities specific needs. 

Plenum Before Cleaning Plenum After Cleaning Plenum After Sealing
Plenum Before Cleaning Plenum After Cleaning Plenum After Sealing


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