Nu-Calgon 4291-08 Nu-Brite® Condenser Coil Cleaner | 1 Gallon Ultra-High Foaming Alkaline Degreaser

Nu-Calgon 4291-08 Nu-Brite is the industry's gold standard for outdoor condenser maintenance, acting as the heavy-duty "brain" of your system’s thermal exchange recovery. This cutting-edge, non-acid, alkaline-based formula is specifically engineered to replace dangerous hydrofluoric acid cleaners while delivering superior brightening and cleaning power. Designed to penetrate deep into multi-row condenser coils, it aggressively cuts through grease, grime, and oxidation. When applied, it initiates a high-foaming reaction that pushes hidden debris out of the coil fins, restoring original heat transfer efficiency and lowering head pressures in high-demand residential and commercial refrigeration systems. 

Key Features

• Superior Foaming Action: Formulated under part number 4291-08 to produce a dense, expanding foam that lifts deeply embedded "blankets" of dirt and cottonwood from within the coil.
• Non-Acid Safety Profile: Provides the same brightening and cleaning results as traditional acid cleaners without the hazardous fumes or the risk of respiratory distress associated with hydrofluoric acid.
• Rapid Grease Emulsification: Specifically balanced with advanced surfactants to dissolve kitchen grease, exhaust oils, and environmental pollutants on contact.
• Metal Brightening Technology: Effectively removes the dulling oxide film from aluminum fins, restoring the "like-new" shine and maximizing the coil's ability to reject heat.
• Highly Concentrated Economy: This 1-gallon container is designed to be diluted (typically 4:1), providing up to 5 gallons of powerful cleaning solution for multiple service calls. 

Product Details

• Brand: Nu-Calgon
• Manufacturer Part #: 4291-08
• Container Size: 1 Gallon (3.8 Liters)
• Product Type: Alkaline Condenser Cleaner
• Foaming Ability: Ultra-High Foaming
• Color: Bright Blue
• pH Value: 13-14 (Concentrate)
• Specific Gravity: 1.2
• Certifications: NSF Registered (P1) for food processing areas; Biodegradable
• Application: Outdoor Air-Cooled Condensers ONLY 

🛠️ HVAC Depot Pro Tip

Dilute and Saturate! Never apply this product full strength on a hot coil. For standard maintenance, mix 1 part Nu-Brite to 4 parts water in a plastic pump sprayer. Take a picture first to see the "before" state of the fins. Apply from the bottom up to ensure even coverage. Allow the foam to work for 5–10 minutes, but do not let it dry on the aluminum. Rinse thoroughly with a low-pressure hose from the inside out. Because this is a high-alkaline product, always wear eye protection and gloves, and ensure you rinse the surrounding grass or landscaping with plenty of water to prevent spotting. 

Cross-Reference

• Superseded/Alternate Part Numbers:

  4291-08, 429108, NCG429108

• Legacy/Bulk Sizes:

  4291-05 (5 Gallon Pail), 4291-01 (55 Gallon Drum)

• Industry Equivalents:

  Viper Heavy Duty, DiversiTech Pro-Blue, RectorSeal Renewz

• Drawing/Old Codes:

  4291-07 (Historical sizing)

Model Compatibility

• Residential Condensing Units Suffixes: 1.5 Ton to 5 Ton Outdoor Units
• Commercial Rooftop Units (RTU) Suffixes: 7.5 Ton to 50 Ton Units
• Air-Cooled Chillers Suffixes: Large Format Aluminum/Copper Coil Banks
• Refrigeration Condensers Suffixes: Walk-in Cooler & Freezer Outdoor Units