Navien NPE‑240A2 Condensing Tankless Water Heater (with Professional Installation)

Navien NPE‑240A2 condensing tankless water heaters deliver instant hot water with built-in recirculation and ultra-efficient performance.

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$8,235.29

Navien NPE‑240A2 Advanced Condensing Tankless Water Heater

Part of Navien’s NPE‑A2 Series, the NPE‑240A2 features a built‑in buffer tank and recirculation pump for instant hot water, reduced cold water sandwich, and ultra-efficient performance in residential or light commercial applications.

Efficiency:

Uniform Energy Factor (UEF): 0.95 (Natural Gas or Propane)
ComfortFlow® system includes a 0.5-gallon buffer tank and recirculation pump for consistent hot water delivery

Performance:

Max BTU Input: 199,900 BTU/hr
Max Flow Rate:
- 11.2 GPM @ 35°F temperature rise
- 8.7 GPM @ 45°F rise
- 5.6 GPM @ 67°F rise

Durability & Safety:

Dual stainless steel heat exchangers for corrosion resistance and longer life
Built-in flame sensor, freeze protection, overheat protection, and fan rotation detection

Installation & Features:

Indoor or outdoor wall-hung installation
Vents with 2″ or 3″ PVC, CPVC, or polypropylene up to 75 feet
Field convertible between natural gas and propane
EZNav™ multi-line backlit control panel with diagnostic display
Cascade up to 32 units or common vent up to 12 units with Ready-Link® technology

Plus:

ENERGY STAR® Certified
Compact dimensions: 17.3″ W × 27.4″ H × 13.2″ D
Min flow rate: 0.5 GPM (operation possible down to 0.01 GPM with optional flow control)
Low NOx emissions – compliant in all air quality districts

Warranty:

15-Year Limited Warranty on Heat Exchanger (Residential)
5-Year Limited Warranty on Parts
1-Year Limited Warranty on Labor

Learn more on the official product page:
Navien NPE‑240A2 Product Details

Item	NPE-240A2
Heat Capacity (Natural Gas)	13,300 – 199,900 BTU/h (3.9 – 58.57 kWh)
Heat Capacity (Propane)	13,300 – 199,900 BTU/h (3.9 – 58.57 kWh)
Efficiency (UEF)	0.95 (NG & LP)
Flow Rate @ 35°F Rise	11.2 GPM (42.4 l/min)
Flow Rate @ 45°F Rise	8.7 GPM (32.9 l/min)
Flow Rate @ 67°F Rise	5.6 GPM (21.2 l/min)
Dimensions (W x H x D)	17.3″” x 27.4″” x 13.2″” (43.9 cm x 69.6 cm x 33.5 cm)
Unit Weight	77 lbs (34.9 kg)
Installation	Indoor or outdoor wall-hung
Venting Type	Forced draft direct-vent
Ignition	Electronic ignition
Water Pressure Range	15 – 150 PSI (1.05 – 10.55 kg/cm²)
NG Supply Pressure	3.5″” – 10.5″” WC (0.87 – 2.61 kPa)
LP Supply Pressure	8″” – 13″” WC (1.99 – 3.23 kPa)
NG Manifold Pressure	-0.03″” – -0.96″” WC (-0.0075 – -0.24 kPa)
LP Manifold Pressure	-0.02″” – -0.96″” WC (-0.005 – -0.24 kPa)
Minimum Flow Rate	0.5 GPM (1.9 l/min), < 0.01 GPM (0.04 l/min) with ComfortFlow®
Cold Water Inlet Size	3/4″”
Hot Water Outlet Size	3/4″”
Gas Inlet Size	3/4″”
Power Supply	120V AC, 60 Hz
Max Power Consumption	200 W (max 2 A), 350 W (max 4 A with external pump)
Casing Material	Cold rolled carbon steel
Heat Exchangers	Primary: Stainless steel Secondary: Stainless steel
Exhaust Venting	2″” or 3″” PVC, CPVC, polypropylene, or stainless steel (Class II, A/B/C)
Intake Venting	2″” or 3″” PVC, CPVC, polypropylene, or stainless steel (Class II, A/B/C)
Vent Clearances	0″” to combustibles
High Elevation Limit	Up to 10,100 ft (NG or LP)
Safety Devices	Flame rod, APS, ignition detector, high limit switches, exhaust sensor, power surge fuse, burner fuse, vent installation detector

15 Year No Hassle Warranty Package Includes:

Frame to Retrofit
Gas Connection
Sediment Trap
Venting (No Roofer)
Service Kit
Water Ball Valve
Tankless Pan
Expansion Tank
Condensate Neutralizer
Permit and Inspection if Needed
Up To $650 In Rebates
Manufacturer Warranty of 15 Years Heat Exchanger, 5 Years Parts, 1 Year Labor*

*Ongoing membership to Friends and Family Plan qualifies you for Bacon Wrapped 15 Year No Hassle Warranty

Note: Roofer not included. Add attic access if installation is above the first floor.