Description
The NPE-180A2 is the A2 version of Navien’s NPE-2 condensing tankless range, and the difference is inside the cabinet: a small buffer tank and a recirculation pump. Together they keep a little hot water ready at the heater, which smooths out the brief cold slug you can get when a tap is switched off and on again, and lets the unit run a recirculation loop so hot water reaches distant fixtures sooner.
Gas input modulates from 10,000 to 150,000 BTU per hour, with two stainless steel heat exchangers recovering heat from the exhaust for a 0.95 Uniform Energy Factor. Navien rates flow at 8.4 gallons per minute at a 35°F rise and 6.5 GPM at 45°F. That covers two showers at once in most homes, making it a good fit for a one- or two-bathroom house where the furthest tap is a long pipe run away. Venting runs up to 75 feet in 2-inch pipe, and a 1/2-inch gas line can serve it for runs up to 24 feet, which often saves re-piping on a replacement job.
This is a gas appliance. It has to be installed by a licensed plumbing or heating professional, following Navien’s installation manual and your local codes for gas supply, venting and condensate drainage. Please confirm sizing and fuel type with your installer before you order.
Specifications
- Model: NPE-180A2
- Gas input: 10,000-150,000 BTU/h
- Uniform Energy Factor: 0.95
- Flow rate: 8.4 GPM at 35°F rise; 6.5 GPM at 45°F rise
- Recirculation: Built-in buffer tank and recirculation pump
- Venting: 2 in. up to 75 ft, or 3 in. up to 150 ft (PVC, CPVC, approved polypropylene or stainless steel)
- Connections: 3/4 in. cold in, hot out and gas; 1/2 in. gas pipe capable up to 24 ft
- Electrical: 120V AC, 60 Hz
- Dimensions: 17.3 x 13.2 x 27.4 in (W x D x H)
- Weight: 73 lbs
- Installation: Indoor or outdoor, wall-hung
- Certification: ENERGY STAR
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