Registered Business
Official name: System Sequoiaway Mining Review Co., Ltd.
Established: 2019
Head office: Office 12, 63 Placeholder-gil, Cheongju 00000, South Korea
How We Started
System Sequoiaway Mining Review began in 2019 when two former industrial HVAC technicians in Cheongju noticed a pattern: operators were buying air-cooled ASIC units rated above 0.05 TH/s without understanding how those machines would behave in Korean summer humidity. Bench sheets from overseas sellers rarely matched local power quality or room ventilation.
We started with handwritten airflow maps and a borrowed power analyzer. Within a year, warehouse operators in Chungcheong Province were calling us before they signed purchase orders — not to sell hardware, but to tell them whether a proposed row of machines would survive a July heatwave without throttling.
What We Do Today
Our work remains hands-on. We bench-test units on arrival, document hash rate against wall draw, and commission installations in garages, converted storage units, and small industrial bays. We do not manufacture miners, operate a pool, or broker resale inventory. Our revenue comes from review fees, installation contracts, and ongoing stability support.
Our Team
Jae-won Park — Lead commissioning technician. Fifteen years in commercial ventilation before moving to mining hardware assessment. Handles on-site electrical verification and duct routing.
Hye-jin Oh — Bench lab manager. Runs our Cheongju test bench, firmware baselines, and thermal photography for every reviewed unit.
Dong-min Lee — Client liaison and report author. Translates technical findings into documents suitable for landlords, insurers, and tax advisors.
Working Principles
We document before we recommend. If a room cannot support the heat rejection of proposed hardware, we say so in writing — even when that means a smaller deployment. We keep spare fan assemblies and common power cables on hand for commissioning days, but we do not mark up equipment sales.
We answer questions from first-time garage operators with the same attention we give warehouse rows running dozens of units. Mining hardware is loud, hot, and unforgiving of shortcuts; our reports reflect that reality.