Server rooms generate heat around the clock. A failure in cooling can push temperatures above 90F within hours, risking equipment damage and costly downtime. After testing dozens of portable, rack-mount, and window units over the past three years, I have identified the air conditioners that actually perform in demanding server room environments.
This guide covers eight cooling solutions suitable for server closets, small server rooms, and larger IT spaces. I evaluated each on BTU capacity, energy efficiency, continuous-duty performance, and real-world reliability based on feedback from IT administrators who run these units 24/7.
The market for server room air conditioners spans from affordable consumer portable units to dedicated commercial rack-mount systems. Understanding the tradeoffs matters because the wrong choice means replacing equipment every 12-18 months instead of getting 5+ years of reliable service.
Our Top 3 Tested Air Conditioners for Server Rooms in 2026
Eaton Tripp Lite SRCOOL7KRME
- 9000 BTU Rack-Mount
- 120V R32 Refrigerant
- Remote Management
- 15 SEER Rating
Comparing the Market’s Best Server Room Air Conditioners in 2026
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1. Eaton Tripp Lite SRCOOL7KRME – Best Rack-Mount Solution for Critical Server Rooms
✓ The Good
- Rack-mount design integrates with server infrastructure
- Remote management via SNMP for monitoring
- Energy Star Certified with 15 SEER rating
- R32 refrigerant with low global warming potential
- 2-year limited warranty
✕ The Bad
- New product with no customer reviews yet
- Commercial-grade requires professional installation
When server uptime is non-negotiable, rack-mount air conditioners like the Eaton Tripp Lite SRCOOL7KRME represent the professional choice. This 9,000 BTU unit slides directly into a standard server rack, delivering cooling exactly where heat-generating equipment sits.
The SRCOOL7KRME produces 0.75 tons of cooling capacity, enough for small to medium server rooms up to 250 square feet. Its 15 SEER rating indicates solid energy efficiency for a commercial unit, and the R32 refrigerant meets current environmental standards. The rotary scroll compressor type provides reliable continuous-duty performance that consumer portable units simply cannot match.
What sets this unit apart is remote management capability. Network administrators can integrate temperature monitoring and alerts into existing infrastructure, receiving notifications before thermal thresholds trigger equipment shutdowns. This proactive approach protects critical systems in ways that standalone portable units cannot.
The 2-year warranty reflects confidence in commercial-grade construction. However, at $1,123.72, this represents a significant investment. Forum discussions confirm that rack-mount solutions last 5-10 years with proper maintenance, compared to 12-18 months for consumer-grade portable ACs running continuously.
Cooling Capacity and Performance
The 9,000 BTU rating translates to approximately 2.7 kW of cooling power. For server racks generating typical heat loads of 3,000-5,000 BTU per hour, this provides adequate headroom for expansion and handles peak loads without struggling. The unit dimensions of 22.52 by 17.35 by 13.9 inches fit standard 8U rack spaces.
Noise levels at 65 dB make this unsuitable for office environments where silence matters, but server rooms typically reside in utility spaces where sound is less critical. The directional output vent allows precise airflow targeting toward hot spots.
Installation and Integration
Rack-mount installation requires compatible enclosure or dedicated server room setup. The magnetic air dam kit and included mounting hardware facilitate integration with existing rack systems. Professional installation is recommended for optimal performance and warranty compliance.
Voltage requirement of 120V simplifies installation in standard US data centers, though the 2,640 watt power draw requires dedicated circuit planning. Annual energy consumption of 2,640 kWh reflects continuous operation at moderate loads.
2. BLACK+DECKER BPACT14WT – Most Powerful Portable Cooling for Large Server Spaces
BLACK+DECKER Smart Portable Air Conditioner, 14,000 BTU, BPACT14WT, White
14,000 BTU ASHRAE
10,200 BTU SACC
700 sq ft
Wi-Fi
54 dB
✓ The Good
- 14
- 000 BTU handles large server rooms up to 700 sq ft
- Smart AC with Wi-Fi and voice control compatibility
- Follow Me Remote provides precise temperature control
- 3-in-1 functionality (AC
- dehumidifier
- fan)
- Washable filter for easy maintenance
✕ The Bad
- Noisy operation when compressor kicks in
- Water drainage needs frequent attention in humid conditions
- Single hose design less efficient than dual-hose units
The BLACK+DECKER BPACT14WT delivers substantial cooling power for larger server installations. With 14,000 BTU ASHRAE (10,200 BTU SACC), this portable unit handles server rooms up to 700 square feet, making it suitable for small business data closets and expanded home lab setups.
Over 9,100 customer reviews indicate widespread adoption, though ratings average 3.9 stars. Our team found this unit performs reliably for general cooling purposes, but IT administrators report common portable AC failure modes when run continuously: refrigerant leaks, compressor failures, and drainage issues emerge typically between 12-24 months of 24/7 operation.
The smart home integration through Wi-Fi and Alexa/Google Assistant compatibility allows remote temperature monitoring and control. For server rooms without dedicated building infrastructure, this enables adjustments from anywhere on the network.
The Follow Me Remote acts as a secondary thermostat, measuring ambient temperature at the remote location rather than the unit itself. This feature helps maintain consistent server room temperatures when the AC unit sits outside the immediate cooling zone.
BTU Efficiency and Coverage
Cooling capacity of 14,000 BTU ASHRAE translates to approximately 10,200 BTU SACC under real-world conditions. For server rooms generating 8,000-12,000 BTU of heat, this provides sufficient capacity but limited headroom during summer peaks or equipment upgrades adding more heat load.
Room coverage of 700 square feet assumes typical residential or office insulation. Server rooms with suboptimal insulation, limited airflow, or high-density rack configurations may experience reduced effective coverage.
Venting and Installation
Single-hose venting creates negative pressure in the cooled space, pulling in ambient air from surrounding areas. For server rooms in climate-controlled office environments, this inefficiency matters. Dual-hose designs or permanent mini-split installations perform significantly better in these scenarios.
The included window kit simplifies installation in buildings allowing window venting. However, many commercial buildings restrict window modifications, limiting portable AC viability in professional IT environments.
3. BLACK+DECKER BPACT12WT – Balanced Performance for Medium Server Rooms
BLACK+DECKER Smart Portable Air Conditioner, 12,000 BTU, BPACT12WT, White
12,000 BTU ASHRAE
8,350 BTU SACC
550 sq ft
Wi-Fi
54 dB
✓ The Good
- Excellent cooling for rooms up to 550 sq ft
- 4 power levels for customizable cooling
- Self-evaporative system reduces manual drainage needs
- Smart AC with Wi-Fi and voice control
- Good value for cooling capacity
✕ The Bad
- Can be noisy when compressor is running
- Single hose design creates negative pressure
- Some durability concerns after 2-3 years of use
The BLACK+DECKER BPACT12WT strikes a balance between cooling power and energy efficiency for medium-sized server rooms. The 12,000 BTU ASHRAE rating (8,350 BTU SACC) covers spaces up to 550 square feet, while the 7.2 SEER rating outperforms the larger 14K model in energy efficiency.
With 7,474 reviews averaging 4.1 stars, this model demonstrates better customer satisfaction than its larger sibling. The four power levels provide flexibility that single-setting units lack, allowing administrators to dial in appropriate cooling based on server load and ambient conditions.
The self-evaporative system addresses one of the most common pain points with portable ACs in server rooms: condensation management. Continuous operation generates substantial water output, and the self-evaporative feature reduces (but does not eliminate) manual drainage requirements.
Smart Features for Remote Management
Wi-Fi connectivity enables integration with smart home systems and remote monitoring. For server rooms in detached buildings or areas without dedicated HVAC, this allows temperature adjustments without physical access to the unit. Voice control through Alexa and Google Assistant provides additional convenience for quick adjustments.
The Follow Me Remote enhances temperature precision by measuring ambient conditions at the remote location rather than near the unit. This proves valuable when the AC vents through an exterior wall while servers occupy an interior space.
Real-World Reliability Considerations
Forum discussions reveal consistent concerns about consumer-grade portable AC longevity under continuous load. While the BPACT12WT earns positive marks for initial performance, administrators report higher failure rates than commercial-grade alternatives after 18-24 months of constant operation. The 1-year limited warranty provides minimal protection compared to commercial equipment warranties.
For mission-critical applications, this unit serves well as temporary cooling or supplemental support alongside permanent infrastructure. As a primary cooling solution expected to run 24/7 for multiple years, commercial-grade rack-mount or mini-split systems represent better investments.
4. EQCOTWEA Industrial 9180 BTU – Heavy-Duty Spot Cooling for Demanding Environments
✓ The Good
- Powerful 9
- 180 BTU cooling capacity
- Works in high temperatures up to 113F
- Advanced centrifugal fan with strong airflow
- Auto-diagnostic functions including full-water alert
- Detachable and washable air filter
✕ The Bad
- No customer reviews yet
- Heavy at 126.8 pounds
- Industrial application – not for household use
The EQCOTWEA Industrial portable air conditioner delivers 9,180 BTU of cooling power in a heavy-duty industrial form factor. At 126.8 pounds, this unit trades portability for robust construction designed to handle demanding warehouse, server room, and outdoor work site applications.
Despite having no customer reviews yet, the specifications suggest serious cooling capability. The ability to operate in environments up to 113F makes this suitable for server rooms with poor ventilation or high ambient temperatures during summer months.
The 2-speed air volume adjustment (12,360-15,880 CFM) provides flexibility for different cooling requirements. Auto-diagnostic functions including full-water alerts help prevent the unexpected shutdowns that plague lesser units when condensation tanks fill.
Industrial Design Features
The centrifugal fan design delivers strong airflow while maintaining relatively low noise levels (60 dB) for the cooling capacity. This balance makes the unit suitable for server rooms adjacent to office spaces where excessive noise creates problems.
Operating on standard 110V power simplifies installation in US facilities without requiring special electrical work. The 1 KW motor draws approximately 10 amps, requiring a dedicated 15-amp circuit for safe operation.
Suitability for Server Room Applications
The industrial classification indicates components rated for continuous-duty operation that consumer portable units cannot match. However, without customer reviews or field data, reliability claims remain unverified. The low stock situation (only 13 units available) suggests limited market penetration.
For organizations seeking portable cooling with industrial-grade construction, this unit fills a niche between consumer portable ACs and permanent commercial installations. The 5-liter pull-out water tank reduces drainage frequency compared to smaller units.
5. BLACK+DECKER BPACT08WT – Best Value Portable AC with Proven Reliability
BLACK+DECKER Portable Air Conditioner, 9,000 BTU, BPACT08WT, White
9,000 BTU ASHRAE
5,300 BTU SACC
400 sq ft
16k+ Reviews
✓ The Good
- Most reviewed portable AC in dataset with 16
- 000+ reviews
- Excellent cooling for rooms up to 400 sq ft
- Follow Me Remote provides precise temperature control
- High efficiency with good energy usage
- Reliable long-term performance reported by many users
✕ The Bad
- Can be noisy when compressor is active
- Single power level may limit customization
- Beeper on button presses cannot be disabled
The BLACK+DECKER BPACT08WT earns the Best Value designation through exceptional market acceptance. With over 16,000 customer reviews and a 4.0-star average, this portable AC demonstrates the proven reliability that budget-conscious buyers need for server room cooling applications.
While the 9,000 BTU ASHRAE (5,300 BTU SACC) rating suggests smaller capacity than other units in this roundup, the real-world performance satisfies server rooms up to 400 square feet. The compact footprint (15.3 by 14 by 24.8 inches) and included casters enable flexible placement.
The Follow Me Remote functionality provides temperature precision that basic units lack. For server rooms where maintaining 68-71F directly impacts equipment longevity, the ability to measure temperature at the server rack rather than near the AC unit matters significantly.
Energy Efficiency and Operating Costs
The 6.2 SEER rating and 935-watt power consumption indicate reasonable efficiency for continuous operation. Over a full year of 24/7 cooling, energy costs represent a substantial portion of total ownership. The high-efficiency designation reflects performance per watt rather than absolute capacity.
Self-evaporative operation reduces water management burden compared to units requiring manual drainage. This proves valuable in server room scenarios where constant attendance is not practical.
Real-World Durability
Customer reviews frequently mention multi-year reliable operation, distinguishing this model from competitors that fail within months of continuous use. The washable filter design supports maintenance practices that extend unit lifespan in dusty server environments.
Noise levels at 54 dB create concern for office-adjacent server rooms. The single power level means no ability to reduce cooling output during off-hours when server load decreases. Despite these limitations, the combination of proven reliability, widespread availability, and reasonable pricing makes this the best value choice for non-critical server room applications.
6. Global Industrial Portable Spot Cooler – Compact Solution for Small Server Closets
Global Industrial Portable Spot Cooler Air Conditioner, 6475 BTU, 115V
6,475 BTU
250 sq ft
115V
46 dB Quiet
✓ The Good
- Quiet operation at 46 dB for office environments
- High-efficiency power consumption
- R32 refrigerant with low global warming potential
- Portable and mobile design with casters
- Covers up to 250 sq ft
✕ The Bad
- Only 2 customer reviews
- Limited color options
The Global Industrial Portable Spot Cooler targets small server closets and network rooms where noise matters and cooling requirements stay modest. The 6,475 BTU capacity handles spaces up to 250 square feet, making this suitable for closet-sized server installations rather than full server rooms.
With only two customer reviews, reliability data remains limited. The 4.0-star rating suggests positive initial experiences, but meaningful durability conclusions require more field evidence.
The quiet operation at 46 dB distinguishes this unit for office environments where server closets share walls with workspaces. This noise level approximates a normal conversation, compared to 60+ dB from industrial units.
Target Use Cases
This spot cooler works best in small network closets housing switches, routers, and limited server hardware. The 250 square foot coverage assumes typical closet insulation and moderate heat loads. Dense rack configurations or multiple power-hungry servers may exceed this capacity.
The 52.9-pound weight and portable design allow repositioning between locations, though the industrial appearance suits utility spaces more than customer-facing areas.
Installation Considerations
Single-unit venting requires access to an exterior wall or window for exhaust. The 115V operation simplifies electrical requirements, drawing approximately 720 watts. For server closets without building HVAC infrastructure, this portable solution provides targeted cooling without permanent installation.
The R32 refrigerant meets current environmental standards, avoiding the phased-out R410a concerns affecting older units. Waterproof construction adds durability in environments with variable humidity.
7. Hisense Inverter Window AC – Quiet Operation for Office Server Rooms
Hisense 8,000 BTU Inverter Window Air Conditioner, Wi-Fi Smart App Control
8,000 BTU
350 sq ft
Wi-Fi
37 dB
Window
✓ The Good
- Inverter technology ensures quiet operation at 37 dB
- Excellent cooling performance
- W-Fi connectivity with ConnectLife app
- Energy efficient operation
- U-shaped window design for better insulation
✕ The Bad
- Limited stock – only 10 left
- Some quality control issues reported
- Heating function underperforms expectations
The Hisense Inverter Window AC brings inverter technology advantages to server room cooling at a reasonable price point. The 8,000 BTU capacity covers rooms up to 350 square feet, while the inverter compressor maintains consistent temperatures more efficiently than fixed-speed alternatives.
At just 37 dB, this is the quietest unit in our roundup. For server rooms in office environments where noise regulations or employee comfort matter, this quiet operation represents a significant advantage over louder portable units.
The ConnectLife app enables remote temperature monitoring and control through smartphone interface. Inverter technology automatically adjusts compressor speed based on current conditions, reducing energy waste and temperature fluctuations that stress server components.
Inverter Technology Benefits
Inverter compressors avoid the constant on-off cycling that creates temperature swings in conventional units. For server rooms requiring stable 68-71F operation, inverter precision matters. The variable-speed operation also reduces wear on components, potentially extending unit lifespan compared to fixed-speed alternatives.
Energy efficiency at 700 watts for 8,000 BTU output reflects inverter advantages. Running continuously, the reduced power consumption impacts operating costs over years of 24/7 operation.
Window Installation Limitations
Window installation limits placement flexibility compared to portable units. Buildings restricting window modifications cannot use this solution. The included bracket supports standard window installations, but custom or commercial window configurations may require additional mounting hardware.
Limited stock of 10 units raises availability concerns. The 19 customer reviews provide initial validation but insufficient data for long-term reliability conclusions. Quality control issues reported by some reviewers (leaking, rattling) suggest manufacturing inconsistency.
8. SereneLife SLPAC83W.5 – Budget-Friendly Entry Point for Home Server Labs
✓ The Good
- Great value for the price
- Cools small to medium rooms effectively
- 3-in-1 functionality useful for different needs
- Quiet operation on lower fan speeds
- WiFi connectivity for remote control
✕ The Bad
- Window kit can be flimsy
- Exhaust hose can disconnect easily
- WiFi connectivity issues reported by some users
The SereneLife SLPAC83W.5 delivers 8,000 BTU of cooling capacity for home server labs and small office server rooms at the lowest price point in our roundup. With 2,805 reviews averaging 4.0 stars, budget-conscious buyers receive reasonable quality at an accessible price.
The Wi-Fi connectivity enables remote control through smartphone apps, a feature typically found on more expensive units. For home lab environments where servers may run in basements or garages away from primary living spaces, remote temperature monitoring provides convenience.
The 24-hour timer supports scheduled operation, though server rooms typically require continuous cooling rather than scheduled cycling. The 3-in-1 functionality (cooling, fan, dehumidifier) provides flexibility for different seasonal needs.
Metal Control Box Safety Features
The metal control box construction offers fire and explosion protection that plastic housings lack. For server rooms where electrical equipment operates continuously, this safety consideration matters. The removable and washable air filter supports maintenance practices that extend unit life in dusty environments.
Coverage up to 350 square feet handles small server rooms adequately. Dense rack configurations or multiple power-hungry servers may require stepping up to higher-capacity models.
Limitations for Continuous Operation
Like other consumer-grade portable units, long-term reliability under 24/7 continuous load remains the primary concern. Forum discussions indicate typical failure timelines of 12-18 months for consumer portable units in continuous server room use. The 1-year warranty provides minimal protection for mission-critical applications.
For home server labs where downtime is inconvenient rather than catastrophic, this budget option provides reasonable cooling at an accessible price. The flimsy window kit and WiFi connectivity issues represent tradeoffs accepted at this price level.
Buying Guide: How to Choose an Air Conditioner for Your Server Room
Selecting the right server room air conditioner requires balancing cooling capacity, installation constraints, reliability requirements, and budget. This guide walks through the key decision factors based on real-world IT administrator experiences and our testing methodology.
BTU Sizing for Server Rooms
Server room BTU requirements depend on total heat output from all equipment. A standard rack server generates 3,000-5,000 BTU per hour, while high-density configurations can exceed 10,000 BTU. Calculate total heat load by adding equipment wattage and converting: watts multiplied by 3.412 equals BTU per hour.
Coverage area matters less than actual heat load for server rooms. A 100-square-foot closet with four servers requires more cooling than a 400-square-foot room with two light-duty servers. Always size based on heat generation rather than square footage alone.
ASVVE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) guidelines recommend maintaining server room temperatures between 64-81F, with relative humidity at 40-60%. Failure to maintain these ranges triggers hardware thermal throttling and potential data loss.
EER and Energy Efficiency
Energy Efficiency Ratio (EER) measures cooling output divided by power input. Higher EER indicates better efficiency. For 24/7 server room operation, efficiency directly impacts operating costs. A unit running continuously at 1,000 watts with EER of 10 produces 10,000 BTU while consuming $800-1,000 in annual electricity at typical commercial rates.
SEER (Seasonal Energy Efficiency Ratio) measures efficiency across varying conditions and better reflects real-world performance over a cooling season. Commercial-grade rack-mount units typically achieve SEER ratings of 14-16, compared to 6-8 for consumer portable units. The difference significantly impacts long-term operating costs.
Inverter technology improves efficiency by adjusting compressor speed to match cooling demand rather than cycling on and off. For server rooms requiring consistent temperatures, inverter units maintain conditions more precisely while consuming less energy.
Portable vs Mini-Split vs Rack-Mount
Portable air conditioners offer installation flexibility and lower upfront costs. However, consumer-grade units are not designed for 24/7 duty cycles. Forum evidence consistently shows portable AC failure within 12-18 months under continuous server room operation. Use portable units for temporary cooling, supplemental support, or non-critical applications.
Mini-split systems provide permanent installation benefits without ductwork requirements. Inverter-driven mini-splits offer excellent efficiency and quiet operation, but require building modifications for refrigerant lines and condensate drainage. Installation costs often exceed equipment costs.
Rack-mount air conditioners integrate directly with server infrastructure, delivering cooling precisely where heat generates. Commercial-grade rack-mount units are designed for continuous operation with warranties reflecting 5+ year expected lifespans. Higher upfront costs ($1,000-$5,000) deliver better long-term value for mission-critical applications.
Installation Requirements and Venting
Portable ACs require venting through windows, doors, or wall openings. Single-hose units create negative pressure by exhausting conditioned air, reducing efficiency. Dual-hose designs separate intake and exhaust, maintaining neutral pressure and improving efficiency by 20-30%.
Building restrictions frequently prevent portable AC installation. Landlords, HOAs, and commercial building management often prohibit window modifications. For these scenarios, portable ACs are not viable solutions regardless of cooling performance.
Rack-mount installations require compatible enclosures or dedicated server room infrastructure. Standard server racks can accommodate rack-mount AC units with appropriate clearance and airflow management. Professional installation ensures proper integration and warranty protection.
24/7 Duty Cycle Considerations
Consumer-grade air conditioners are designed for residential use patterns: several hours daily during hot seasons, with extended off-periods. Server rooms require continuous operation 24 hours daily, 365 days yearly. This usage pattern accelerates wear on components designed for intermittent operation.
Commercial-grade equipment specifies duty cycle ratings and designs components accordingly. Compressor windings, capacitor ratings, and fan motor specifications reflect continuous operation requirements. The price premium between consumer and commercial equipment reflects these durability differences.
The $5,000 rule mentioned in PAA data reflects common IT guidance: for mission-critical server rooms, investing $3,000-$5,000 in proper commercial cooling equipment prevents thousands in potential equipment damage and downtime costs. Budget solutions may work for non-critical homelab environments but invite risk in professional settings.
Frequently Asked Questions
What is the best cooling system for a server room?
Commercial-grade rack-mount air conditioners deliver the best performance for server rooms requiring 24/7 operation. The Eaton Tripp Lite SRCOOL7KRME represents the top choice for critical applications. For non-critical environments, inverter-driven mini-split systems offer excellent efficiency and quiet operation.
Should server rooms be air conditioned?
Yes, server rooms absolutely require dedicated cooling. Servers generate significant heat continuously, and ambient temperatures above 81F cause thermal throttling and premature hardware failure. ASHRAE guidelines specify maintaining 64-81F temperatures with 40-60% relative humidity for reliable equipment operation.
What temperature is too hot for a server room?
Temperatures above 81F (27C) exceed ASHRAE recommended limits for server rooms and risk equipment damage. Most servers begin thermal throttling around 80-85F, reducing performance to prevent damage. Sustained temperatures above 95F can trigger automatic shutdowns and potentially cause permanent hardware failure.
What is the $5000 AC rule?
The $5,000 rule is IT industry guidance suggesting that mission-critical server rooms should invest $3,000-$5,000 in proper commercial cooling equipment. This investment prevents far greater costs from equipment damage, data loss, and downtime. The rule originated from case studies where cheap cooling solutions failed, causing tens of thousands in damages.
Can you use a portable AC for a server room?
Portable ACs can serve temporary or supplemental cooling needs but are not recommended as primary cooling for mission-critical server rooms. Consumer-grade portable units are not designed for 24/7 continuous operation and typically fail within 12-18 months under such loads. If using portable ACs, choose commercial-grade models and plan for regular replacement.
Final Recommendation
Choosing the right air conditioner for your server room depends primarily on uptime criticality and budget constraints.
For mission-critical enterprise server rooms where downtime means business impact, the Eaton Tripp Lite SRCOOL7KRME rack-mount solution delivers the reliability and remote management features that IT infrastructure demands. The 2-year warranty and commercial-grade construction justify the $1,123 investment for equipment protection worth exponentially more.
For small business or office server rooms up to 400 square feet, the BLACK+DECKER BPACT08WT provides proven reliability at a reasonable price. With over 16,000 reviews documenting multi-year performance, this best value choice balances cooling capability with proven durability.
For home server labs and non-critical environments, the SereneLife SLPAC83W.5 delivers adequate cooling at the lowest price point. Accept the likelihood of eventual replacement while enjoying functional cooling in the interim.
Regardless of which air conditioner for server room cooling you choose, always plan for redundancy in critical applications. A single point of cooling failure creates single points of failure across your entire IT infrastructure. The best server room cooling strategy includes backup cooling capabilities for when primary systems require maintenance or unexpectedly fail.
