
What causes Oil-Fouling?
- Oil escapes from the compressor(s)
- The oil mixes with the refrigerant.
- The refrigerant and oil are circulated through the coil system.
- Oil bonds to the coil surface, forming growing deposits that impede heat transfer.
- The oil deposits also increase drag, making the compressor work harder.
- The oil buildup eventually coats the entire inside surface of the coil, resulting in ongoing and worsening efficiency loss, along with reduced longevity.
Oil-Fouling can leave units operating at 70% or less of their operating efficiency

The American Society of Heating, Refrigeration and Air-Conditioning Engineers has studied Oil-Fouling for decades
According to ASHRAE, oil-fouling reduces HVAC efficiency by 7% in the first year, 5% in the second, and 2% annually thereafter.
Here's why... As compressors age, oil migrates into the heat exchanger coils, forming a layer that impedes heat transfer. This forces systems to work harder, increasing energy costs, emissions, and the risk of repairs or premature replacement.
Oil-fouling is unavoidable, and while mechanical solutions offer temporary relief, they can't eliminate oil buildup. No cost-effective, lasting solution has existed until now.
The Permanent Solution: ThermaClear®
ThermaClear® is an HVAC preventative maintenance solution that eliminates oil-fouling with one treatment, restoring optimal performance and reducing operational costs.


- Restores Maximum Energy Efficiency – Displaces oil buildup, ensuring optimal heat transfer and reducing energy waste.
- Extends System Lifespan – Super-lubricates compressors, reducing wear and tear, lowering the risk of premature HVAC failures.
- Cuts HVAC Repair Costs – Minimizes the need for costly repairs, replacements, and excessive servicing.
- Prevents Future Oil-Fouling – Forms a permanent protective barrier, eliminating efficiency loss over time.
- Reduces Downtime & Improves Reliability – Ensures consistent indoor cooling and uninterrupted building operations.