When it comes to high-efficiency pneumatic insulation installation, fiberglass requires specialized machine processing. Because fiberglass fibers are inherently clingy and stringy, running them through a standard, unconfigured machine often results in clumping, core-bridging, and severe loss of coverage.
Every Cool Machines insulation blower distributed by Insulation Machines is fully engineered and structurally capable of processing loose-fill and dense-pack fiberglass insulation. However, understanding how to correctly configure your machine’s internal mechanical settings is the secret to unlocking true high-volume production.
⚙️ Engineered for Abrasive & Stringy Fibers
Processing compressed fiberglass blocks requires heavy-duty mechanical agitation and high-volume pneumatic transport. Cool Machines utilizes several deliberate design features to handle this abrasive material at peak efficiency.
1. High-Performance Large Airlocks
For contractors prioritizing massive fiberglass output, upgraded larger airlock configurations are available. Fiberglass is less dense but structurally loftier than cellulose; a larger airlock pocket volume ensures the machine maximizes material drop into the hose pipeline without shearing or crushing the fibers, maintaining better coverage.
2. Specialized Internal Rake Fingers
Because of the naturally cohesive, sticky nature of fiberglass strands, the material wants to wrap around internal spinning parts, causing the hopper to “bridge” or create softball-like clumps. To counteract this, select Cool Machines models employ heavy-duty internal rake fingers. These specialized teeth actively peel the matted fiberglass off the primary auger shafts, keeping the hopper clear and maintaining a steady feed into the airlock chamber.
3. Integrated Bag-Loading Shelves
The CM1500s come standard with rugged loading shelves. The hopper extensions available for the CM700, CM2400 and above, provide a shelf for loading. These platforms allow your crew to easily slide compressed fiberglass bundles, slash the packaging open with a utility knife, and feed the material directly into the hopper with minimal physical lifting.
🛠️ Dense-Packing
Fiberglass performs exceptionally well when dense packing. The loose fibers are less dense than cellulose and you can fill cavities with wall tubing as small as 1″. Cool Machines breaks apart loose fill fiberglass with consistency.
Accurate Pressures via Embedded Gauges
When executing dense-pack fiberglass insulation inside wall cavities or interstitial spaces, maintaining the exact target density is vital. Cool Machines feature embedded pressure gauges that allow technicians to calibrate the exact PSI required for the job.
⚠️ The Coverage Trap: If you operate without monitoring your pressure gauge, fiberglass will rapidly overpack. Over-packing places excessive density in the cavity, destroying your estimated material coverage and cutting directly into your project’s profit margins.
Wall-Spray Systems & Recycling Solutions
If your business focuses on moisture-injected wall spray fiberglass setups, these blowers deliver incredibly consistent results. Furthermore, recycling your overspray on wall-cavity jobs is seamless: you can easily upgrade your setup by attaching custom vacuum hopper extensions or integrating the specialized VacPack system to route recycled fiber straight back into the main hopper loop. Cool Machines has a commercial nozzle designed to spray fiberglass with a wide pattern. The pumps are capable of pressures up to 1000 psi providing plenty of pressure to achieve the proper density in wall cavities.
Frequently Asked Questions (FAQ)
Can I blow both fiberglass and cellulose out of the same machine?
Yes. All Cool Machines blowers are versatile, all-fiber units. However, you must adjust the machine’s internal mechanical variables—such as setting the slide gate, modifying the air-to-material ratio, and adding/removing rake fingers—to match the vastly different weights and densities of fiberglass versus cellulose.
Why does fiberglass require different airlock settings than cellulose?
Fiberglass fibers are highly abrasive and require significant airflow to transport pneumatically without dropping out of suspension in the hose line. Upgrading to a larger airlock allows more lofted material to enter the stream per revolution, maximizing the high-CFM blowers built into the rig.
What happens if I dense-pack fiberglass at the wrong pressure setting?
If your pressure is set too low, the cavity will settle over time, leaving thermal gaps at the top of the wall. If the pressure is set too high, the fiberglass overpacks, causing you to burn through far more material than estimated, which destroys your material coverage and drives up job costs. Always monitor the built-in machine pressure gauge.
