Get a high performance condensing tankless water heater and space heater in one.
Combination Boiler: Where Technology Meets Ecology
→ Heats water only when needed, making it environmentally sound and cost efficient.
→ The ideal solution for people who need both a space heating application and a domestic hot water heater.
Benefits of Hydronic Heating
→ Clean: no air movement means very little chance for dust buildup to lower humidity.
→ Silent: silent heating, with no blowers needed for forced circulation.
→ Comfort: makes people feel warm and comfortable by keeping the floor warm and indoor air fresh.
→ Coverage: radiant heat from the floor to the ceiling.
→ Economical: radiant heat from the floor can send warmth throughout the house even hours after turning off your heater.
• Low cost PVC venting solution for a fast, simplified installation.
• Venting up to 100 feet with up to six elbows (each elbow reduces venting length by 5 feet).
Durable Stainless Steel Heat Exchanger
• Ensures a longer life expectancy than copper heat exchangers.
• Prevents corrosion with integrated primary and secondary heat exchangers.
• Stainless steel components remain intact, even during long period of use.
Premixed, Eco-friendly Burner
• Modulates air and gas ratios needed for optimal combustion.
• Built-in system monitors CO levels and will shut down the unit in the event of hazardous CO build up.
• Prevents water damage to the heater as well as to your property.
Low NOx Emissions
• New metal fiber burner delivers a consistent gas/air mixture
• Less greenhouse gas emissions and acid rain
Automatic Water Filling System
• Automatically fills the space heating pipes with water when the unit senses water shortage.
Powerful Anti-Freeze Feature
• Built-in Control System keeps the unit's plumbing frost free in winter.
Intelligent Remote Control System
• Included with each unit
• Easy to read LCD display
• Easy-to-Use button type control
• Matches any home's interior design
• 24 Hour scheduling for space heating applications
• High-Precision Water Temperature Control with 1°F Increments
|CH-180||CH-210||CH-240, CH240 ASME|
|Heat Capacity (Input)||Min 17,000 BTU/hr.
Max 150,000 BTU/hr
|Min 20,000 BTU/hr.
Max 175,000 BTU/hr
|Min 20,000 BTU/hr
Max 199,900 BTU/hr
|Flow Rate (DHW) at 77°F Rise||3.4 GPM||4.0 GPM||4.5 GPM|
|Dimensions||17" × 28" × 12"||17" × 28" × 12"||17" × 28" × 12"|
|CAAFUE Natural Gas||91%||91%||91%|
|CAAFUE Propane Gas||92%||91%||91%|
|Weight||74 lbs||84 lbs||84 lbs|
|Installation Type||Indoor / Outdoor Wall-Hung||Indoor / Outdoor Wall-Hung||Indoor / Outdoor Wall-Hung|
|Venting Type||Direct Vent||Direct Vent||Direct Vent|
|Ignition||Electronic Ignition||Electronic Ignition||Electronic Ignition|
|DHW Pressure (min-max)||15 - 150 PSI||15 - 150 PSI||15 - 150 PSI|
|Heating Pressure (min-max)||7 - 30 PSI||7 - 30 PSI||7 - 30 PSI|
|Gas Supply Pressure (Natural Gas)||5.5" W.C. ~ 10.5" W.C.||5.5” W.C. ~ 10.5” W.C.||5.5” W.C. ~ 10.5" W.C.|
|Gas Supply Pressure (Propane Gas)||10.5" W.C. ~ 13.5" W.C.||10.5” W.C. ~ 13.5” W.C.||10.5” W.C. ~ 13.5" W.C.|
|Minimum Flow Rate (DHW)||0.5 GPM||0.5 GPM||0.5 GPM|
|Heating Supply / Return||1” NPT||1” NPT||1” NPT|
|DHW Inlet / Outlet||3/4” NPT||3/4” NPT||3/4” NPT|
|Auto Feeder||1/2” NPT||1/2” NPT||1/2” NPT|
|Gas Inlet||3/4” NPT||3/4” NPT||3/4” NPT|
|Main Power Supply||120VAC, 200W (max 2A)||120VAC, 200W (max 2A)||120VAC, 200W (max 2A)|
|Heat Exchangers||Primary Heat Exchanger: Stainless Steel Condensing Heat Exchanger: Stainless Steel||Primary Heat Exchanger: Stainless Steel Condensing Heat Exchanger: Stainless Steel||Primary Heat Exchanger: Stainless Steel Condensing Heat Exchanger: Stainless Steel|
|Venting (0" Clearance) Exhaust (3")||SCH 40 3" PVC, SCH 40 3" Polypropylene, SCH 80 3" CPVC||SCH 40 3" PVC, SCH 40 3" Polypropylene, SCH 80 3" CPVC||SCH 40 3" PVC, SCH 40 3" Polypropylene, SCH 80 3" CPVC|
|Venting (0" Clearance) Intake (3")||PVC, Flex Aluminum, Flex Stainless Steel, ABS||PVC, Flex Aluminum, Flex Stainless Steel, ABS||PVC, Flex Aluminum, Flex Stainless Steel, ABS|
Q1: I would like to buy this Navien heater to replace another water heater that uses metal vent pipe. I read the manual that describes various PVC products to use for venting. The manual does not state that metal should not be used. Are there any performance issues if I use my metal exhaust vent pipe and not the PVC type pipe?
A1: Yes, the reason for using PVC versus metal is for energy efficiency. Navien recommends using PVC because the NPE and NR heaters are condensing type heaters. Using PVC provides the maximum condensing function. The Navien heaters will run more efficiently with PVC.
Yes, you could use your metal venting instead of PVC; the heater will still work safely. Alternatively, you could install the PVC inside the metal venting, using the metal venting as a chase (like a conduit).
Installation Help and Recommendations
We recommend that you have a professional tankless water heater installer review the above recommendations. Improper installation may cause loss of life and/or property. Need an installer? Get 4 FREE Tankless Water Heater Installation Estimates Now. It's Quick and Easy!
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Alternate model number spelling: CH180