Howden Fans USA vs Howden Roots Rotary Lobe Blower: A Procurement-Level Cost & Performance Breakdown

I’ve spent the last six years managing procurement for a mid-sized chemical processing plant. Our annual spend on air-moving equipment alone runs around $180,000—and over that half-decade, I've scrutinized dozens of quotes for Howden equipment.

Everything I'd read about Howden fans USA versus their Roots rotary lobe blower line said it was a simple horsepower question: use fans for high-volume, low-pressure; use blowers for low-volume, high-pressure. That’s technically true—but from a procurement standpoint, the real difference is far more nuanced.

Here's a breakdown of five dimensions where these two product lines diverge. I'm not a mechanical engineer, so I can't speak to impeller design nuances. From a cost-control perspective, though, I can tell you exactly where the money goes.

Dimension 1: Initial Quote Transparency—The Hidden Fee Test

When I started comparing quotes for our last expansion, the first question I asked both teams—Howden Fans USA and Howden Roots—was: What's included in that number?

Howden Fans USA quoted $52,000 for a new axial fan system. The line item included: fan, motor, base plate, vibration isolators, and a one-year warranty. When I asked what wasn't included, they sent a bulletproof list: installation, ductwork, electrical, remote monitoring integration. They didn't hide anything. The total was $52,000. Simple.

Howden Roots quoted $47,200 for a rotary lobe blower package. I almost went with them based on price alone—until I calculated TCO. That $47,200 didn't include the intake filter silencer ($1,800), pressure relief valve ($900), or the VFD controller that wasn't listed as standard. Those extras added $4,200 by the time I added them in. Suddenly, the 'cheaper' option was actually $1,000 more expensive, before factoring in installation differences.

The vendor who lists all fees upfront—even if the total looks higher—usually costs less in the end. I learned to ask 'what's NOT included?' before 'what's the price?'

The Delta

Howden Fans USA's quote was transparent from the start. Howden Roots' quote was lower but required digging to find the real cost. For a procurement manager, that digging is a cost—my time is part of the TCO too.

Per FTC advertising guidelines, claims must be substantiated. Transparent pricing is the baseline. In practice, it's often the exception, not the rule. (Source: FTC Business Guidance on Advertising)

Dimension 2: Service Life & Repair Cycles—The Real Reliability Story

People think expensive vendors deliver better quality. Actually, vendors who deliver quality can charge more. The causation runs the other way.

Our facility runs both a Howden axial fan and a Roots blower. The fan has been running for three years with only one bearing replacement—two weeks downtime, parts cost $800. The blower? In the same period, we've replaced the timing gears once ($2,400) and the discharge check valve twice ($600 each). The blower's downtime is roughly double per incident. In terms of total asset availability, the fan wins by a wide margin—about 4% higher uptime over three years.

Now, I'm not a reliability engineer, so maybe I'm missing something about operating conditions. What I can tell you from my cost tracking system is that our Howden Roots rotary lobe blower has a higher per-year maintenance spend: about 3.2% of its purchase price annually, versus 1.8% for the fan.

That's a hidden cost that compounds over the life of the equipment. By year five, you're looking at a 7-8% TCO difference just from repairs.

Dimension 3: Energy Efficiency at Operational Speeds

Here's something vendors won't tell you: the efficiency curves are much flatter on the fan than on the blower. The Howden axial fan maintains 83-85% efficiency across a 60-100% speed range. The Roots blower drops from 82% down to 68% when you run it below 70% load.

That matters because we rarely run equipment at full load. Our facility fluctuates. When I modeled our actual operating profile—70% average load, with spikes—the fan used 12% less kWh annually than the blower, despite having a slightly higher rated power. That's a $6,800 per year difference on our electric bill. In six years, that's over $40,000 in energy savings. For a $52,000 fan, that pays for the unit in energy savings alone.

If you're a seasonal business with demand spikes, the calculus might be different. For consistent, moderate-load operations, the fan is dramatically more efficient.

Dimension 4: Space & Integration Requirements

Our facility control room has limited floor space. The Howden fan footprint is roughly 4′ × 5′. The Howden Roots blower with its necessary accessories (silencer, filter, relief valve, and the required 3′ clearance on all sides for service access) takes up about 8′ × 10′.

That's a 4x floor space difference. Real estate in our plant runs about $30/sq. ft. (opportunity cost). The blower costs us an additional $1,800 per year just to house it. Not a deal-breaker, but an invisible cost that never shows up on the repair budget.

For that reason alone, if you have space constraints, the fans have an edge. The blowers need breathing room—literally.

Dimension 5: Spare Parts Strategy—The 'Cheap Spares' Trap

After tracking several orders in our procurement system, I found that a huge chunk of our 'budget overruns' came from emergency parts sourcing. With the Howden Roots blower, certified rebuild kits cost $800 per year (timing gears, bearings, seals). Generic aftermarket parts run about half that—$400. But we had a $2,100 redo when a generic discharge valve failed within a month. The OEM replacement cost $450. We wasted $1,650 trying to save $400.

The Howden fan is more forgiving. Its bearings and seals are common industrial parts—available from multiple sources at near-identical quality. We've used aftermarket bearings with zero issues. The fan's design seems to tolerate variances better.

The 'cheap' option on a blower resulted in a $1,650 redo when quality failed. On a fan, the cheap option was actually just fine.

What I mean is: the total cost of spares isn't just the parts price—it's the risk of failure multiplied by the cost of downtime. If your process can't afford unplanned stops, OEM parts on the blower are the only safe bet. On the fan, you have flexibility.

How to Choose: A Decision Framework for Procurement

Choose the Howden Fan if:

• You need high volume, low pressure (e.g., ventilation, cooling, material handling).
• You have limited floor space.
• Your operation runs below 80% load most of the time.
• You want lower maintenance spend and energy cost over 5+ years.

Choose the Howden Roots Rotary Lobe Blower if:

• You need high pressure, low volume (e.g., pneumatic conveying, aeration, process air).
• Your load is consistently at 85%+ of rated capacity.
• You can allocate a larger footprint and budget for higher maintenance.
• You need the pressure differential a fan simply can't provide.

For 80% of applications I've seen, the fan wins on TCO. But that last 20%—high-pressure, high-consistency loads—is where the blower is irreplaceable. The key is knowing which one your facility actually needs, not just which one has a lower first quote.

I've built a cost calculator for internal use after getting burned on hidden fees. If you're comparing these two for your next capital investment, start by modeling your actual operating profile. The answer will be obvious from there.