Loose-fill and wall-spray cellulose insulation remains a great choice for achieving high R-value and excellent sound dampening. However, any experienced contractor will tell you that not all cellulose is created equal. The market is filled with dozens of regional and national brands, each with its own frustrating manufacturing characteristics:

• The Dusty Brands: Excessively fine fibers that create jobsite visibility hazards and clog standard blower filters.

• The Clumpy Brands: Highly compressed, dense bundles that resist breaking apart, leading to hose blockages and slow production.

• The High-Oil Brands: Materials containing elevated levels of mineral oil (used to suppress dust) that make it difficult for wall spray applications.

Running these unpredictable materials through a basic machine causes immediate coverage losses and severe downtime. The Cool Machines lineup distributed by Insulation Machines is intentionally engineered to overcome the absolute worst material conditions in the industry, turning inconsistent fiber into uniform, high-coverage profit.

⚙️ Advanced Material Conditioning & Self-Cleaning Shredders

The secret to maximizing your square-footage coverage per bag lies in how thoroughly the fiber is conditioned before it enters the airlock.

1. High-Speed Scalping Shredders

To ensure your coverage rates remain at peak performance, Cool Machines offers an optional hyper speed shredder. These highly condition the cellulose and provide excellent coverage. You may save money after the first truckload.

In the real world, cellulose manufacturing isn’t perfect. It is common to open a bag and find the material contaminated with plastic scraps, baling wire, and loose garbage from the recycling plant. In a standard blower, this debris wraps around the shafts, binds the system, and forces your crew to stop and manually clear the hopper.

Cool Machines utilize a hyper-speed shredder design that relentlessly pulverizes or isolates incoming junk. This mechanical action essentially self-cleans the shredder shafts, preventing material wrap-up and ensuring a continuous, uninterrupted feed into the airlock.

2. Tailored Airlock Scaling

Pneumatic efficiency is deeply tied to airlock volume. We offer various airlock sizes across our model lineup to match your crew’s processing goals. Whether you are running a portable unit for residential attics or a massive truck-mounted rig, scaling your airlock size ensures the perfect volume of conditioned cellulose drops into the hose line per rotation, maximizing your bags-per-hour output.

🌬️ Smart Filtration and Field-Serviceable Engineering

Cellulose dust is harsh on blowers. Cool Machines addresses this with easy dust diversions.

Built-In Fresh Air Intakes

The high-dust environment inside an insulation box truck or trailer can quickly suffocate a blower engine. Cool Machines are engineered with built-in fresh air intakes and integrated filtration systems. This design draws clean air from outside the immediate dust cloud, filtering out airborne cellulose particles while keeping the primary blowers cool during grueling, multi-hour operations.

Unmatched Component Accessibility

A clean machine is a long-lasting machine. Over time, fine dust will accumulate inside any blower. Cool Machines prides itself on open-architecture engineering, offering easy, immediate access to all core components. Your crew can open the service panels, blow out accumulated dust, inspect chains, and swap out airlock seals quickly without dismantling the entire chassis.

🔄 Seamless Wall-Spray Cellulose Recycling

For contractors specializing in moisture-injected wall-spray cellulose applications, managing overspray is an absolute necessity.

Cool Machines eliminates material waste by offering integrated recycling solutions. You can easily outfit your blower with an optional Vacuum Hopper Extension or our specialized VacPack system. These accessories allow your crew to vacuum the shaved cellulose overspray directly off the stud bays and route it straight back into the main hopper loop. The recycled fiber is instantly blended with dry material and sent right back down the hose line, driving your material waste down to near zero.

Frequently Asked Questions (FAQ)

Why does my cellulose insulation keep clumping in the hose line?

Hose clumping is usually caused by under-conditioned material or an improper air-to-material ratio. If your blower lacks high-speed shredder shafts, dense chunks of cellulose enter the airlock whole. These may not break down properly if the shredders are full of junk. These unconditioned clumps may block the air stream.

How does a high mineral oil content affect my blowing machine?

Mineral oil is excellent for keeping job site dust down, but it makes the cellulose fibers highly cohesive and sticky. While this does not impact your machine, it may make it difficult to do wall spray cellulose. 

What is the benefit of having multiple airlock sizes available?

Different jobs require different pneumatic balances. Open-attic blowing requires high material volume, while dense-packing walls requires high pressure ($PSI$) and a steady, controlled feed. Having access to various airlock sizes allows you to choose a machine configuration perfectly optimized for your primary business model.

What machine is best to use for Wall Spray Cellulose?

While all of the machines on this site are capable for doing wall spray cellulose, there are a few considerations:

1. High Rise Buildings: Choose either the CM700 or CM1500. These are portable machines that are easily transported through elevators. You can easily manually recycle material back to the hopper.
2. Very Small Projects: Again, choose either the CM700 or CM1500 which are able to help you get close access to manually recycle back to the hopper.
3. A few residential homes a year: While the CM700 and CM1500 are very capable, you may want to consider a CM2400 or CM3000 which can be outfitted with a hopper extension that has vacuum portals to recycle with a standard insulation vacuum.
4. Consistent work and larger buildings: The CM3500 and CM4500 are the best choices to do large quantities of work. They can be outfitted with a VacPack to recycle back to independent recycling hoppers with an internal vacuum system.

How can you reduce the cellulose dust while blowing?

Cool Machines makes an internal wetting system. This addition to a blower allows you to connect to a water source. It automatically adds a mist of water to the cellulose. This does not saturate the cellulose. Nor does it add too much water. It adds just enough to cost the dust down. Also, when used with stabilized cellulose, it makes a crust throughout the cellulose so that it does not settle over time.

Call Insulation Machines at 877-909-USMADE for a the best configuration if you blow cellulose insulation.