Super-B SQ24 Continuous-Flow Grain Dryer

The Super-B SQ24 is the prairie-sweet-spot model in the SUPER-B Energy Miser SQ Series. With 490 bushels of holding capacity, a 24-foot 6-inch grain column, and a 25 HP fan, the SQ24 is engineered for two-combine prairie operations and large single-combine farms running on tight harvest windows. It is the most-installed Super-B model in the 700-1,500 BPH capacity range across Canadian prairies.

The SQ24 represents a significant step up from the SQ20 — not just in size, but in the way it handles peak combine output during prairie harvest pressure. Where smaller models can become a bottleneck when both combines are pulling hard on tough wheat or damp canola, the SQ24’s combination of column length, fan capacity, and heater output keeps drying throughput matched to combined combine pace through the day.

For prairie farms running two Class 8 combines on mixed crops — or single-combine operations on 2,500+ acres with a high probability of harvest weather pressure — the SQ24 frequently represents the right balance of capacity, footprint, and capital cost in the Super-B SQ Series before stepping up to the larger SQ28 or SQ32.

SQ24 Configuration Choice — D, E, A, or M

The SQ24 is offered in four standard configurations defined by the letter suffix after the model number. All four share identical grain column dimensions, holding capacity, and core drying technology — the differences are in drying mode capability and fuel-efficiency features.

SQ24D — Full Heat (Single Zone)

Continuous-flow full-heat operation with one temperature throughout the column. Grain leaves the dryer hot and is cooled in-bin afterward. Lowest capital cost in the SQ24 frame.

Best for: Two-combine operations focused primarily on a single crop (e.g., dedicated feed-grade wheat operations) where in-bin cooling capacity is well-established. Less common on mixed-crop prairie farms where mode flexibility is needed.

SQ24E — Continuous Flow with Louvers

Adds adjustable cooling louvers enabling three drying modes: full heat, pressure heat / pressure cool, and pressure heat / vacuum cool. The most-installed configuration of the SQ24 on Canadian prairie farms.

Best for: Mixed-crop two-combine prairie operations handling wheat, canola, oats, and pulses. The standard recommendation for typical 2,500–6,000 acre prairie operations.

SQ24A — Continuous Flow with Hot Air Return Duct

Adds the hot air return duct for heat recovery — Super-B’s “Energy Miser” feature delivering up to 20% lower fuel consumption during continuous operation. On a high-capacity model like the SQ24, the fuel savings during heavy harvest seasons can pay back the configuration premium within 3–5 years.

Best for: High-volume two-combine operations drying 50,000+ bushels per season, custom drying businesses, large mixed-crop farms where fuel cost is a meaningful operating expense, and long-term ownership scenarios.

SQ24M — Two-Temperature-Zone

Uses two distinct temperature zones for full-heat or pressure-heat / pressure-cool drying. Designed for operations needing precise temperature staging across the grain column.

Best for: Seed-grade producers running larger-volume operations, large pulse processors, malting barley growers at scale, and specialty grain operations where temperature control directly affects grade-out and crop value at high throughput.

Key Specifications

Specification	Value
Series	SUPER-B Energy Miser SQ Series
Configuration	Single-module continuous flow
Total Fan HP	25 HP
Auger Load HP	5 HP
Chain Unload HP	2 HP
Column Length	24′ 6″
Overall Length	36′ 4″
Overall Height	14′ 2″
Total Holding Capacity	490 BU
Configurations Available	D (Full Heat), E (Louvers), A (Energy Miser), M (Two-Zone)
Fuel	LP or Natural Gas
Burner	Brock full flame-wall with stainless steel baffles
Blower	Double-width, double-inlet centrifugal (standard)
Grain Column	Variable-width (narrower top, wider bottom)
Outer Skins	18-gauge stainless steel perforated
Unloading	EVENFLO drag-chain conveyor
Standard Controls	QUANTUM or SPECTRUM
Optional Controls	INTUI-DRY 15.6″ touchscreen with remote access
Plenum Door	42″ × 22″ vertical access with safety shutdown switch

Drying Capacity by Crop and Mode

All capacities below are wet bushels per hour. Standard reference (corn 25.5%→15.5%) is published by Brock for cross-model comparison. Prairie crop capacities vary with grain temperature, ambient temperature, fines content, and crop maturity.

Corn Capacity (Manufacturer Standard Reference)

Mode	Moisture Removal	Capacity (BPH)
Full Heat – Single Zone (Model D)	25.5% to 15.5% (10 points)	740
Full Heat – Single Zone (Model D)	20.5% to 15.5% (5 points)	1,211
Modified Full Heat – Single Zone (Models M, E, A)	25.5% to 15.5%	710
Modified Full Heat – Single Zone (Models M, E, A)	20.5% to 15.5%	1,163
Pressure Heat – Two-Zone (Model M)	25.5% to 15.5%	670
Pressure Heat – Two-Zone (Model M)	20.5% to 15.5%	1,091

Approximate Prairie Crop Capacity (Practical Estimates)

Crop	Moisture Removal	Approximate Capacity (BPH)
Hard Red Spring Wheat	16% → 14.5% (1.5 points)	2,500–3,200
Wheat	18% → 14.5% (3.5 points)	1,400–1,900
Canola (crush grade, 82°C max)	12% → 8% (4 points)	1,100–1,500
Canola (seed grade, 45°C max)	12% → 8% (4 points)	550–800
Oats	16% → 14% (2 points)	1,800–2,400
Yellow Peas	18% → 16% (2 points)	1,300–1,800

These prairie-crop estimates are derived from the published corn ratings and typical efficiency factors for each crop. Always confirm capacity for your specific crop, moisture differential, and ambient conditions with your dealer before sizing.

Fan & Heater Configuration

The SQ24 runs a single 25 HP centrifugal blower — the largest fan motor in the SQ16/SQ20/SQ24 progression and the same fan rating used on the SQ32 (which uses a longer column at the same airflow rate). The double-width, double-inlet centrifugal blower design provides:

• Significantly lower noise than axial fans found on most competitors and earlier Super-B models
• Higher static pressure capability for consistent airflow through the SQ24’s longer 24′ 6″ column
• Better energy efficiency at the SQ24’s drying capacity than equivalent axial designs

The trade-off — common to all centrifugal-blower SQ Series units — is that the fan can ice up in extreme cold (typically below approximately –17°C) and may require a thaw-out cycle. For typical prairie harvests, this is rarely a daily issue. For late-October and early-November drying in northern Alberta and Saskatchewan, build a thaw-out interval into your operating expectations.

The Brock full flame-wall burner with stainless steel baffles provides clean, even heat distribution across the SQ24’s longer grain column. The plenum is engineered to maintain uniform temperatures from front to back of the column, which is particularly important on the SQ24 because longer columns have greater potential for front-to-back variation than shorter columns. Uniform plenum temperature directly affects grain quality consistency at high throughput.

The SQ24 is configured for either liquid propane (LP) or natural gas (NG) at order. For SQ24-class operations drying 30,000+ bushels per season, the long-term fuel cost difference between propane and natural gas is substantial — often $5,000–15,000+ per season. If natural gas is available at your yard for under approximately $25,000 connection cost, the math typically favors natural gas for SQ24 installations.

Grain Column & Holding Capacity

The SQ24 features Super-B’s variable-width grain column in its longer 24′ 6″ configuration. The geometry is the same as smaller SQ Series models — narrower at the top for efficient moisture removal, wider at the bottom for better dwell time — but applied across a meaningfully longer column for higher throughput.

Total holding capacity: 490 bushels — including the perforated wet garner bin at the top, the active grain column, and the discharge zone. The wet garner pre-warms incoming grain using exhaust heat from the lower drying chambers, beginning the drying process before grain enters the main column. On the SQ24’s larger throughput, this pre-heating contributes meaningfully to overall drying efficiency.

Stainless steel perforated outer skins (18-gauge) are standard. With proper maintenance — including thorough cleaning between crops and especially after canola — stainless skins typically outlast every other component on the dryer. Operators report 25–30+ year service life on the skin assemblies of well-maintained SQ Series units.

For drying canola or other small grains at SQ24 capacity, the small grain screen option is essential. The SQ24’s higher throughput means more potential for screen plugging from canola fines — daily screen inspection during canola drying campaigns is non-negotiable.

Loading, Unloading & Metering (EVENFLO System)

The SQ24 uses the same patented EVENFLO drag-chain unloading system as smaller SQ Series models, scaled up for higher throughput.

Loading: A 5 HP top auger (versus 3 HP on the SQ16/SQ20) feeds wet grain from your wet bin into the SQ24’s perforated wet garner. The 5 HP rating is sized to keep up with the SQ24’s drying capacity during peak operation without becoming a fill-rate bottleneck.

Unloading via EVENFLO: A slow-moving drag-style chain conveyor at the base of the dryer powered by a 2 HP variable-speed AC motor. On the SQ24’s longer 24′ 6″ column, the EVENFLO advantages over conventional metering-roll systems become more pronounced:

• Even unloading across the full column length — eliminates the column-to-column flow imbalance that becomes more problematic as columns get longer
• Gentler grain handling at higher throughput — kernel damage scales with throughput on metering-roll systems but stays low on the EVENFLO
• Debris-tolerant — SQ24-class operations often handle larger volumes with more variable cleanliness, where metering rolls would jam more frequently
• Easier between-crop cleaning — removable top cover means crop changeovers happen faster on the SQ24’s larger drying mass
• Consistent metering — chain speed control delivers reproducible exit moisture even at high throughput

For prairie operations frequently switching between wheat, canola, oats, and pulses on the same machine — a typical pattern on Canadian farms — the EVENFLO’s clean-out advantage on the SQ24 is a meaningful operational benefit.

Operating Modes

The SQ24 supports continuous-flow drying with mode capability dependent on configuration:

Full Heat (D, E, A, M configurations) — Maximum drying intensity. Grain exits the dryer hot and is cooled in-bin. Highest published BPH ratings — 1,211 BPH on corn at 5-point removal. Best for high-throughput drying with adequate in-bin cooling capacity.

Pressure Heat / Pressure Cool (E, A, M configurations) — Cooling air pushed through the lower portion of the column. Grain exits cooled and ready for direct binning. The most-used mode on prairie operations because it eliminates in-bin cooling complexity.

Pressure Heat / Vacuum Cool (E, A configurations) — Cooling air pulled through the lower column via vacuum. Different airflow characteristics than pressure cool; operator preference and grain type dictate selection.

Two-Zone Pressure Heat (M configuration only) — Hotter top zone for moisture removal, cooler bottom zone for finishing and grain protection. Used for sensitive crops including seed-grade canola, malting barley, and premium pulses.

For most prairie SQ24 buyers, the E configuration with pressure cool mode covers virtually every drying scenario. The A configuration is particularly valuable on the SQ24 because the higher annual fuel consumption at SQ24 capacity makes the heat-recovery payback faster than on smaller models.

Transport & Installed Dimensions

Dimension	Value
Overall Length	36′ 4″
Overall Height	14′ 2″
Overall Width (varies by config)	Approximately 10′ 2″
Total Fan HP	25
Auger Load HP	5
Chain Unload HP	2

The SQ24 is designed as a fixed installation. While relocation is possible with appropriate heavy-haul equipment, the SQ24’s combination of size, weight, and infrastructure requirements (concrete pad, three-phase electrical service at 25 HP fan motor capacity, fuel infrastructure for higher BTU consumption, wet bin and discharge handling) means most installations are permanent.

Concrete pad requirement: The SQ24 requires a substantially larger and more heavily reinforced concrete pad than smaller SQ Series models. Plan for an engineered pad designed for the dryer’s operating weight plus full grain load — confirm specifications with your dealer and local engineer based on soil conditions.

Three-phase electrical service: The 25 HP fan motor and supporting auxiliary loads are best served by three-phase service. Single-phase operation with a phase converter is possible but not commonly specified on SQ24-class installations because operations large enough to justify an SQ24 typically already have three-phase infrastructure for combines, augers, and grain handling equipment.

INTUI-DRY Controls and Remote Monitoring

Like all current SQ Series dryers, the SQ24 supports two control system options:

QUANTUM or SPECTRUM Controllers (Standard) — Brock’s standard electronic dryer controllers covering all operating modes, plenum temperature setpoints, moisture targeting, and basic diagnostic logging.

INTUI-DRY Controller (Optional Upgrade — Strongly Recommended for SQ24) — A 15.6-inch full-color touchscreen system with intuitive management of all dryer functions and remote smartphone access.

On the SQ24 specifically, the INTUI-DRY upgrade is more compelling than on smaller models for two reasons:

1. Higher daily drying volumes mean more setpoint adjustments and more potential for fault conditions.Catching a fault remotely versus discovering it on a yard walk can save hours of throughput on a unit drying 1,000+ BPH.
2. Two-combine operations typically have the operator running combines, not the dryer. Remote monitoring and control from the combine cab keeps the SQ24 productive while the operator stays where they need to be during peak harvest.

Historical performance data captured through INTUI-DRY also enables season-over-season optimization — particularly valuable on a unit handling 50,000+ bushels per harvest where even small efficiency gains translate to meaningful fuel savings.

Optional Equipment

Beyond the standard configuration, the SQ24 supports several factory and dealer-installed options:

Small Grain Screen — Smaller perforations for canola, mustard, and other small grains. Reduces maximum throughput on standard crops by approximately 20%.

MOISTURE EQUALIZER System — A patented Brock option that moves the hottest and driest grain through the dryer faster, improving drying uniformity. Particularly valuable on the SQ24 because longer columns have greater potential for moisture variation top-to-bottom — the MOISTURE EQUALIZER addresses that variation directly.

INTUI-DRY Touchscreen Upgrade — Strongly recommended for SQ24-class operations.

Heat-Recovery Hot Air Return Duct (A configuration) — Up to 20% fuel savings during continuous operation. On the SQ24, the per-season fuel cost reduction typically pays back the configuration premium in 3–5 years for operations drying 50,000+ bushels annually.

Reversing Cooling Louvers (E, A, M configurations) — Adjustable cooling louvers for fine-tuning the cooling air volume.

Service Access Catwalks and Platforms — Required for safe operation and maintenance access. The SQ24’s larger size means more comprehensive catwalk and ladder requirements than smaller models.

Pneumatic Discharge System Compatibility — Many Canadian SQ24 installations pair the dryer with a Walinga Ultra-Veyor or similar pneumatic distribution system to move dry grain from the dryer to multiple bins without auger handling. The SQ24’s discharge configuration supports pneumatic integration well.

Best Applications for the SQ24

The SQ24 fits a specific operational profile across larger Canadian prairie farms.

Best fit for the SQ24:

• Two-combine prairie operations on mixed crops (Class 8 combines, typically 2,500–6,000 acres)
• Large single-combine operations on 2,000+ acres with high probability of harvest weather pressure
• Mixed-crop farms handling wheat, canola, oats, and pulses where mode flexibility matters
• Operators replacing aging SQ500B or SQ16/SQ20-class units with similar combine fleets but expanded acreage
• Custom drying operations serving multiple neighboring farms
• Yards with three-phase electrical service and established large-load infrastructure

Best fit for the SQ24E (most-installed configuration):

• Mixed-crop two-combine prairie operations needing flexibility across full heat and pressure cool modes
• Operators handling 30,000–80,000 bushels of drying per season

Best fit for the SQ24A (Energy Miser):

• Two-combine operations drying 50,000+ bushels per season where fuel cost is a meaningful operating expense
• Custom drying businesses with significant annual run-time
• Long-term ownership scenarios where the heat-recovery payback period (typically 3–5 years on SQ24-class operations) clearly justifies the configuration premium

Best fit for the SQ24M:

• Large seed-grade canola producers needing precise temperature staging at SQ24 throughput
• Pulse processors handling premium-grade product where temperature management directly affects grade-out
• Malting barley operations at scale

Less suitable for:

• Single-combine operations where the SQ24’s capacity exceeds actual demand — consider the SQ16 or SQ20 instead
• Three-combine or larger commercial operations consistently exceeding the SQ24’s capacity ceiling — step up to the SQ28 or SQ32
• Yards without three-phase service and unwilling to add a phase converter for the 25 HP fan motor
• Operations without space or capital for the SQ24’s larger footprint and infrastructure requirements

How the SQ24 Compares to Adjacent Models

SQ24 vs SQ20: The SQ20 has a 20′ 5″ column versus the SQ24’s 24′ 6″, with a 20 HP fan versus 25 HP, and 408 BU holding versus 490. Drying capacity in corn at 5-point removal increases from 976 BPH (SQ20) to 1,211 BPH (SQ24) — about 24% more throughput. The SQ24 is the right choice for two-combine operations and larger single-combine farms; the SQ20 is the right choice when capacity demand is in the 800-1,000 BPH range and the smaller footprint matters.

SQ24 vs SQ28: The SQ28 has a 28′ 7″ column, 30 HP fan, 7.5 HP loader (versus 5 HP on the SQ24), and 572 BU holding. Drying capacity in corn at 5-point removal increases from 1,211 BPH (SQ24) to 1,371 BPH (SQ28) — about 13% more. The SQ28 is the right step up for three-combine operations or larger custom drying businesses. The SQ24 is the better choice for two-combine operations because the SQ28’s additional capacity rarely offsets its larger physical footprint and higher capital cost on a typical two-combine farm.

SQ24 vs SQ16: The SQ16 is a much smaller machine — 326 BU holding, 15 HP fan, 16′ 4″ column. Corn drying capacity at 5-point removal is 770 BPH on the SQ16 versus 1,211 BPH on the SQ24 — about 57% more on the SQ24. The capital cost step is significant. The SQ16 is the right choice for single-combine operations under 1,500 acres; the SQ24 is the right choice once you’re running two combines or pushing harder than the SQ16 can sustain.

Frequently Asked Questions

What’s the difference between the SQ24, SQ24E, SQ24A, and SQ24M? All four are the same SQ24 model with different drying mode capabilities. SQ24D is full heat only, SQ24E adds louvers for pressure cool modes, SQ24A adds the heat-recovery duct for fuel savings (Energy Miser), SQ24M provides two-temperature-zone operation. The E configuration is the most-installed on prairie farms; the A configuration is increasingly popular on high-volume operations.

Is the SQ24 a portable or fixed dryer? The SQ24 is designed as a fixed installation on a reinforced concrete pad with three-phase electrical service and supporting infrastructure. Relocation is possible but uncommon.

What’s the holding capacity of the SQ24? 490 bushels total — including the wet garner bin, active drying column, and discharge zone.

How much grain can an SQ24 dry per hour? Manufacturer-published capacity in corn is 1,211 BPH at 5-point moisture removal (Model D, full heat) and 740 BPH at 10-point removal. For prairie crops, capacity varies significantly: wheat at 1.5-point removal can run 2,500-3,200 BPH, while seed-grade canola at 4-point removal at the 45°C temperature limit may run 550-800 BPH. Always confirm capacity for your specific scenario with your dealer.

Why is the SQ24 the most-installed Super-B in two-combine operations? It’s sized to match combined output of two Class 8 combines on typical prairie crops without becoming a bottleneck. Smaller SQ Series models force combines to slow down on tough days; larger models often carry capacity that’s never fully used. The SQ24 hits the practical sweet spot for the most-common prairie operation profile.

Can the SQ24 run on single-phase power? Three-phase service is strongly preferred for the 25 HP fan motor. Single-phase operation with a phase converter is possible but adds cost and complexity, and most operations large enough to justify an SQ24 already have three-phase infrastructure.

Does the SQ24 handle canola at high throughput? Yes — with the small grain screen option and proper temperature management (45°C maximum for seed grade, 82°C maximum for crush grade per Canola Council guidelines). The variable-width column and EVENFLO unloading system handle canola’s specific requirements well. Daily screen inspection is essential during canola drying campaigns at SQ24 throughput because higher volumes mean more potential for screen plugging from canola fines.

What fuel does the SQ24 use? LP (liquid propane) or natural gas (NG), selected at order. For SQ24-class operations drying 30,000+ bushels per season, the long-term fuel cost case for natural gas is strong if it’s available at your yard for reasonable connection cost.

Is the SQ24A (Energy Miser) worth the configuration premium? For operations drying 50,000+ bushels per season, typically yes — the heat-recovery duct’s 20% fuel savings often pay back the configuration premium in 3–5 years. For lower annual volumes, the standard SQ24E is more economical.

How long does an SQ24 last? With proper maintenance, current SQ Series units are designed for 25–30+ year service life. Stainless steel skins typically outlast every other component. Daily cleaning during peak season and thorough between-crop cleanout are the most important maintenance practices on SQ24-class operations.

What financing is typical for an SQ24 purchase? Major Canadian agricultural lenders — Farm Credit Canada, ATB Financial, the prairie credit unions, and major banks — offer equipment financing structured around grain delivery cycles. Brock and most major dealers also have manufacturer-supported financing programs. Get pre-approved before negotiating — a documented financing position improves your dealer negotiation.

Related Models in the SQ Series

• Super-B SQ16 — 326 BU holding, single-combine prairie sweet spot
• Super-B SQ20 — 408 BU holding, mid-range step up from the SQ16
• Super-B SQ28 — 572 BU holding, three-combine operations
• Super-B SQ32 — 654 BU holding, large commercial operations

For complete buying guidance — sizing math, crop-specific operation, used vs. new pricing, and how Super-B compares to GSI, Vertec, and Neco — read our Super-B grain dryers buyer’s guide.

Browse all grain dryers on Aglist to compare across manufacturers.

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