For nearly two decades, Noctua built its reputation on premium air coolers and fans, largely resisting the industry's gradual shift toward all-in-one liquid cooling solutions. That changed in 2026, when the company finally entered the AIO market with the launch of the NL-LC1 series, available in 240 mm, 360 mm, and 420 mm variants.

The model reviewed here, the NL-LC1-36, occupies the sweet spot of the lineup. It combines a 360 mm radiator with three flagship NF-A12x25 G2 fans and a collection of custom-engineered acoustic technologies designed to minimize noise without compromising thermal performance.

Unlike many competing premium AIO coolers that emphasize RGB lighting, LCD displays, and software-driven feature sets, Noctua has taken a fundamentally different approach. The company selected Asetek's flagship Emma V2 platform as its foundation and then extensively refined the surrounding ecosystem, focusing on acoustics, mounting performance, reliability, and user experience. The result is a cooler that prioritizes engineering excellence over visual flair, staying true to the philosophy that has defined Noctua's products for years.

The NL-LC1 series is based on Asetek’s renowned, premium-grade Emma V2 platform, which has established itself as a gold standard for both thermal efficiency and long-term dependability. What makes the NL-LC1 coolers unique is Noctua’s custom-engineered NL-PNA1 pump noise absorber: Leveraging a three-layer acoustic soundproofing structure and the tuned-mass damper effect, the NL-PNA1 reduces both air-borne noise and structure-borne vibrations, which can yield significant improvements in pump acoustics.

For fine-tuning performance-to-noise characteristics, the NL-LC1 series pump integrates a mode switch that allows users to choose between three different pump speed profiles: While the pre-selected quiet mode guarantees that the pump will stay near-inaudible, the balanced mode provides extra performance headroom, and the manual mode gives users full control over the pump’s entire RPM range.

Available in 240 (NL-LC1-24), 360 (NL-LC1-36) and 420mm (NL-LC1-42) form factors, the NL-LC1 coolers utilise Noctua’s award-winning NF-A12x25 G2 and NF-A14x25 G2 fans for cutting edge performance-to-noise efficiency. Working in tandem with the pump noise absorber, the G2 flagship fans are the second key factor to the NL-LC1 series’ unique capability of delivering first-rate thermals while running extremely quiet. To ensure a smooth, unobtrusive sound signature, the fans utilise a speed-offset to avoid undesirable harmonics phenomena such as periodic humming or vibration build-up due to beat frequencies.

While the NL-PNA1 pump noise absorber comes with a magnetically attaching metal faceplate, users who require extra ventilation for VRMs, RAM modules, M.2 SSDs or other near-socket components have the option of replacing it with the NL-ACF1 auxiliary cooling fan that is available separately.

Noctua’s proven SecuFirm2+™ mounting system not only enables easy installation, broad socket support and future upgradability, but also helps to improve thermal performance through optimised force transfer and offset mounting options.

Topped off with the renowned NT-H2 thermal paste and Noctua’s usual 6-year manufacturer’s warranty, the NL-LC1 are a deluxe choice for customers who are looking for premium grade all-in-one liquid coolers that satisfy the highest demands in terms of performance, reliability and quietness of operation.

Suggested retail prices

The manufacturer’s suggested retail prices are as follows:

• NL-LC1-24: EUR 219.90 / USD 219.90
• NL-LC1-36: EUR 249.90 / USD 249.90
• NL-LC1-42: EUR 279.90 / USD 279.90
• NL-ACF1: EUR 19.90 / USD 19.90

Full Specifications

Note that the 240mm and 360mm models use NF-A12x25 G2 fans, while the larger 420mm model steps up to NF-A14x25 G2 140mm fans. The NF-A12x25 G2 fans are rated at 22.5 dB(A) at their 1800 RPM maximum.

At first glance the NL-LC1-36 appears conventional. Looking closer reveals a product carefully optimized around acoustic and thermal efficiency. The Noctua NL-LC1-36 is based upon Asetek Emma V2 platform with tweaks from Noctua in terms of sound dampening and fans design. The cooling units themselves are manufactured by Asetek, then shipped to Noctua's factory in Taiwan for final assembly, quality control, and packaging. Every unit undergoes an acoustic check after the NL-PNA1 is fitted, before it ever leaves the factory.

Asetek Emma V2 Platform

Emma V2 is Asetek's first pump to feature a fully closed impeller design, replacing the open and semi-open impellers used in previous generations. The impeller incorporates carefully tuned balancing holes that reduce axial forces at high rotational speeds, improving efficiency and stability.

Compared to Asetek's previous-generation Sigrid V2 pump, Emma V2 delivers approximately 58% higher flow rates and 124% greater head pressure at the same noise level. Even against the newer, mainstream-focused Ingrid platform, Emma V2 maintains a clear advantage, offering around 13% higher flow rates and 21% more head pressure under equivalent acoustic conditions.

A key contributor to this performance is a completely redesigned 12-pole, three-phase motor featuring sensorless commutation control and self-tuning startup behavior. This new motor design provides smoother operation, reduced vibration, and higher overall efficiency than previous Asetek generations.

The combination of the closed impeller architecture and the advanced 12-pole motor makes Emma V2 remarkably power efficient. According to Asetek, the pump requires only 16% of the power consumed by the company's first-generation AIO pumps to achieve the same cooling performance. Even when compared with the more recent Sigrid platform, Emma V2 reduces performance-normalized power consumption by nearly 40%.

Efficiency gains are further enhanced by extensive optimization of the pump housing. Every internal fluid channel has been engineered with organic contours and an ultra-smooth surface finish to minimize flow resistance and suppress turbulence. This allows the pump's higher flow rates to translate more effectively into thermal transfer at the CPU cold plate, maximizing cooling performance while maintaining low power consumption and noise levels.

What Sets It Apart From Other AIOs

A few things separate the NL-LC1-36 from the rest of the 360mm AIO field:

• It's not fully in-house. Unlike Noctua's fans and air coolers, which are designed entirely by Noctua, the NL-LC1-36's core pump-and-radiator platform is licensed from Asetek. Noctua's contribution is the noise absorber, fan tuning, mounting hardware, paste, and overall integration — not the base liquid-cooling engineering itself.
• Acoustic engineering is the priority, not RGB or displays. At a price point where rivals often ship LCD screens and elaborate lighting, the NL-LC1-36 offers none of that — just a metal logo plaque.
• The pump noise absorber is a genuine first, combining acoustic soundproofing with tuned-mass-damper vibration control in one pump cover — something not currently offered elsewhere in the AIO market, backed by real SPL, psychoacoustic, and vibrometer data rather than marketing claims alone.
• A wider pump RPM range than most competitors, with an automatic, temperature-based safety ramp that protects the pump without operator intervention.
• Hotspot-optimized offset mounting with steel hardware, measurably improving contact quality and thermal performance over the plastic mounting parts common on rival Emma V2-based coolers.
• An optional, purpose-built auxiliary fan (NL-ACF1) for near-socket airflow — something most AIO makers don't offer at all.