Rinnai RX180iN Condensing Tankless Water Heater + Free BF.HG-34 Filter
Brand: Rinnai | Bundle SKU: RX180iN-SpecialBundle
While supplies last: Receive one free Big Frog Supply BF.HG-34 Water Heater Pre-Sediment Filter Unit with this bundle. The filter adds $0 to the base heater price.
Product Overview
The RX180iN provides a middle input level in the RX condensing family: 180,000 BTU/h with no internal recirculation pump. It can suit a project where the RX199’s larger input is unnecessary and the hot-water load fits the RX180 performance curve. The installer can configure the heater for natural gas or propane and plan any separate recirculation equipment.
Bundle Contents
- 1 x Rinnai RX180iN tankless water heater
- 1 x Big Frog Supply BF.HG-34 Water Heater Pre-Sediment Filter Unit — included at $0 additional cost
The BF.HG-34 is a separate cold-water filter assembly. This offer does not include installation labor, additional plumbing or venting components unless expressly identified.
Key Features
- 180,000 BTU/h maximum input for hot-water sizing against the manufacturer performance curve.
- 0.98 UEF condensing platform; condensate drainage must be planned.
- No internal recirculation pump; choose separately designed recirculation equipment if needed.
- One BF.HG-34 filter included at no additional charge, while supplies last.
Common Uses
Residential hot-water upgrades and tankless replacements where a condensing heater matches the calculated demand and installation plan.
Technical Specifications
- Base heater model: RX180iN
- Bundle SKU: RX180iN-SpecialBundle
- Fuel: Natural gas or propane (professional setup required)
- Input: 15,000-180,000 BTU/h
- Uniform Energy Factor (UEF): 0.98
- Published heater maximum flow: 10.0 GPM; actual flow depends on temperature rise and installation conditions
- Heater weight: 55 lb
- Installation: Indoor; outdoor installation requires RXOVC accessory, sold separately
- Built-in recirculation pump: No
- Heater power supply: 120 V AC, 60 Hz
- Heater gas, hot-water and cold-water connections: 3/4 in. NPT
Included BF.HG-34 Filter Specifications
- Filtration: 5-micron sediment cartridge with polyphosphate scale control
- Connections: 3/4 in. inlet and outlet
- Working pressure: 30-75 PSI
- Operating water temperature: 40-100°F; cold-water inlet only
- Maximum filter flow: 9.5 GPM
- Filter dimensions: 25-3/4 in. x 5-1/4 in.
- Cartridge replacement: as needed, not to exceed one year
Dimensions
Heater cabinet: 18.5 in. W x 25.8 in. H x 11.4 in. D. The dimensional drawing shows approximately 30.11 in. overall vertical extent including connections; allow the required installation and service clearances. Heater weight is 55 lb; it excludes the separate filter and shipping packaging.
Compatibility & Installation Notes
Have a qualified installer configure the heater for the available gas supply, size the vent and condensate system, and confirm water and gas pressure. Outdoor use requires the separately sold Rinnai RXOVC vent cap. Install the BF.HG-34 on the cold-water inlet only. Its limits are 30-75 PSI, 40-100°F water temperature and 9.5 GPM maximum flow. The filter must be included in system flow and pressure-drop calculations; the heater’s maximum GPM is not a guaranteed assembled-bundle flow rate. Keep hot water and thermal expansion from entering the filter. The filter does not replace water softening when required, water-quality treatment, heater flushing or manufacturer maintenance.
For the included filter assembly, see the BF.HG-34 product listing.
Frequently Asked Questions
What comes with this special bundle?
One Rinnai RX180iN tankless water heater and one Big Frog Supply BF.HG-34 water-heater pre-sediment filter unit. The filter is included at no additional charge while supplies last.
Can this heater use natural gas or propane?
The RX/RXP platform supports natural gas or propane through the manufacturer’s professional setup procedure. A qualified installer must configure and verify the correct gas type; it is not an automatic fuel-switching feature.
Is a recirculation pump built in?
No. The RX180iN has no internal recirculation pump. Any recirculation arrangement requires the appropriate separately selected equipment and design.
Does the free filter replace regular heater maintenance?
No. The BF.HG-34 filters sediment and uses polyphosphate for scale control, but it does not replace heater flushing or the manufacturer’s maintenance schedule. Replace its cartridge as needed for water conditions and usage, no later than one year. Its maximum flow is 9.5 GPM and maximum working pressure is 75 PSI.
Why Buy from Big Frog Supply?
The RX180iN offers 180,000 BTU/h input and 0.98 UEF without an internal pump. It gives buyers a lower-input alternative to the RX199iN while retaining the RX family’s gas-setup flexibility; allow for the included BF.HG-34’s 9.5 GPM maximum in the final design.
Base heater model: RX180iN
Bundle SKU: RX180iN-SpecialBundle
Fuel: Natural gas or propane (professional setup required)
Input: 15,000-180,000 BTU/h
Uniform Energy Factor (UEF): 0.98
Published heater maximum flow: 10.0 GPM; actual flow depends on temperature rise and installation conditions
Heater weight: 55 lb
Installation: Indoor; outdoor installation requires RXOVC accessory, sold separately
Built-in recirculation pump: No
Heater power supply: 120 V AC, 60 Hz
Heater gas, hot-water and cold-water connections: 3/4 in. NPT
Included BF.HG-34: 5-micron sediment/polyphosphate filter; 3/4 in. connections; 30-75 PSI; 40-100°F cold-water applications; maximum filter flow 9.5 GPM. Heater maximum flow does not describe assembled-bundle flow.
