(New Open Box) InstaGas Classic CS120 5.1 GPM 120,000 BTU Residential Natural Gas Tankless Water Heater, Indoor White
(New Open Box) InstaGas Classic CS120 5.1 GPM 120,000 BTU Residential Natural Gas Tankless Water Heater, Indoor White
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Upgrade your home with the InstaGas Classic CS120 Tankless Water Heater — a powerful and compact natural gas system delivering endless hot water with high efficiency.
Perfect for residential homes looking for reliable, on-demand hot water without the bulk of a tank system.
📦 Condition
✔️ New – Open Box
✔️ Model: FDG420IN-CS120-NG
✨ Key Features
🔥 120,000 BTU High-Efficiency Natural Gas Heating
🚿 5.1 GPM Continuous Hot Water Output — ideal for residential use
🏡 Indoor Installation — compact & space-saving
⚪ Clean White Finish — modern, low-profile design
⚡ On-Demand Heating — no waiting, no storage tank, lower energy use
🌡️ Stable Temperature Control — consistent hot water delivery
🔧 Great for Homes, Condos & Renovations
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Shipping
Ships within 48 hours.
Shipping calculated at checkout. -
Returns & Cancellations
Cancellations can be made within 24 hours after purchase.
Each product is checked and tested before we ship. If there are any issues, please get in touch with us within 10 days of delivery. Restocking fees may apply. Read more about our return policies here .