Meet the Rinnai 8.5 GPM 180K BTU Residential Outdoor Liquid Propane Tankless Water Heater — a compact powerhouse built for homes that want endless hot water on demand without indoor clutter. Designed for outdoor mounting, it delivers reliable warmth where space is precious and venting headaches are a non-issue.

Key Features & Design

• 8.5 GPM at 180K BTU — ample hot water for showers, kitchens, and laundry, on demand.
• Outdoor LP tankless design — installs outside without the hassle or expense of venting.
• Compact, suitcase-sized footprint — mounts outside to free up indoor space.
• Easy operation with helpful LED alerts and simple controls.
• Durable outdoor performance designed to withstand non-traditional or space-limited installations.
• Warranty package — 15-year heat exchanger warranty, 5-year parts, and 1-year labor, plus 4 more years of labor if registered within 90 days. Use it for light commercial settings too, with a solid 8-year/12,000-hour heat exchanger warranty.
• Professional support and trusted service network to keep your home comfortable for years to come.
• Fast, reliable shipping — FREE USA SHIPPING. Will be packed and shipped within 1-3 business days and delivered between 5-10 business days.

Why settle for less when you can have dependable hot water on tap, energy-efficient operation, and outdoor convenience all in one unit? This model’s outdoor design means quicker installation, lower indoor footprint, and reliable performance in various weather conditions, backed by strong warranties and professional support.

Specs at a glance

• Flow Rate: 8.5 GPM
• BTU: 180K
• Energy Source: Liquid Propane (LP)
• Type: Outdoor Tankless Water Heater
• Applications: Residential (with optional light commercial warranty)
• Ventilation: Outdoor installation — no venting required