Marey GA16LP 4.3 GPM Outdoor LP Tankless Water Heater

The Marey GA16LP is a 4.3 GPM outdoor LP-fired tankless water heater, the largest in Marey's outdoor portable line. Designed for cabin and off-grid installs where shore power isn't available — battery-fired ignition runs on two D-cells. 110,000 BTU propane burner produces about 4.3 GPM at a 35°F rise or 2.6 GPM at a 75°F rise.

The GA16LP sits at the top of Marey's outdoor lineup, sized for primary cabin showers and outdoor multi-fixture applications. The 4.3 GPM peak is genuinely useful — supports a comfortable shower plus a small additional draw (handwash, dish rinse) at moderate temperature rises.

Limitations: outdoor-mounting only (front-vented combustion would create CO indoors). The unit faces winter freezing damage if left exposed in below-32°F environments — drain before storage. Build quality is value-tier (1-year warranty versus 2-year for Eccotemp's similar units) — expected lifespan 5–8 years with regular use.

Right buyer: cabin or hunting camp where 4 GPM-class output matters, off-grid installations with reliable propane supply, RV exterior wash stations for larger rigs. Wrong buyer: indoor applications (unsafe), year-round outdoor exposure in freezing climates (damage risk), primary residence use (lifespan insufficient). About $290 unit, often bundled with showerhead and stand.