Eccotemp i12 Indoor 4.0 GPM Propane Tankless

Model i12-LP
4.3/5 from 180 ratings
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Price as of May 2026
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Btu
83000
Venting
Direct Vent
Fuel Type
LP Gas
Tank Type
Tankless
Energy Factor
0.86
Flow Rate Gpm
4

Eccotemp i12 Indoor 4.0 GPM Propane Tankless Review

The Eccotemp i12 Indoor 4.0 GPM Propane Tankless is the propane variant of Eccotemp's indoor i12 line. Provides 4.0 GPM peak capacity sized for 2-bath warm-climate homes using LP fuel.

Specs: 80,000 BTU LP input, UEF 0.81 (non-condensing), 4.0 GPM at a 35°F rise, Category III stainless steel B-vent venting. 10-year warranty on heat exchanger.

Eccotemp's positioning is value — about $750 unit versus $1,000-$1,400 for established indoor propane tankless competitors (Rinnai V53iLP, Bosch). The trade-offs: shorter warranty, smaller US service network, parts handled through Eccotemp customer service.

About $750 unit, $2,000 installed. Right buyer: budget-constrained 1-2 bath indoor propane tankless install in warm climate, particularly rural homes with propane service where cost-to-replace matters more than service-network density.

Full Specifications

Brand
Eccotemp
Model Number
i12-LP
Btu
83000
Venting
Direct Vent
Fuel Type
LP Gas
Tank Type
Tankless
Energy Factor
0.86
Flow Rate Gpm
4
Warranty Years
5
Capacity Gallons
0

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