Featured Categories

  • Tools & Machining
  • Shipping, Packaging & Office Supplies
  • Plumbing
  • Safety

Shop Categories

  • Abrasives & Polishers
  • Adhesives & Tapes
  • Electrical Supplies
  • Electronics
  • Fasteners
  • Food Service & Restaurant Supplies
  • Furniture, Linens & Decor
  • Grounds & Outdoor
  • Hardware & Building Materials
  • Heating & Cooling
  • Janitorial & Cleaning Supplies
  • Lab Equipment & Supplies
  • Lighting
  • Material Handling
  • Medical & Personal Care
  • Paint, Coatings & Supplies
  • Plumbing
  • Power Transmission
  • Pumps
  • Raw Materials
  • Safety
  • Shipping, Packaging & Office Supplies
  • Storage & Workspace
  • Test Instruments & Gauges
  • Tools & Machining
  • Vehicle Maintenance
  • Welding, Soldering & Brazing
  • About Us
  • Promo Codes
  • Contact Us
Added to Cart
Skip to Main Content
FREE Shipping on orders over $50 after you . Restrictions Apply
Zoro Homepage
Close icon
Clipboard Icon Clipboard Icon Quick Order
Cart Icon
0
Cart Icon
0
Cart
  • Low prices on everyday needs. Shop Zoro Select
  • Don't miss these limited time offers. Shop All Deals
  • Get 30 days to pay with Net 30. Apply Now
  1. Home
  2. /
  3. Plumbing
  4. /
  5. Water Heaters
  6. /
  7. Gas Tankless Water Heaters
Search Feedback

Gas Tankless Water Heaters (139 items) - Page 2

Rheem RTGH Series 6.8 GPM 120,000 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater RTGH-68DVLP-3
Rheem

RTGH Series 6.8 GPM 120,000 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater

Zoro # G410947824
Mfr # RTGH-68DVLP-3
product price:  $1,189.99
/ea
Rinnai 9 GPM Commercial 160000 BTU Exterior/Interior Propane/Natural Gas Tankless Water Heater CX160iN
Rinnai

9 GPM Commercial 160000 BTU Exterior/Interior Propane/Natural Gas Tankless Water Heater

Zoro # G211177819
Mfr # CX160iN
product price:  $1,505.70
/ea
Rheem RTGH Series 6.8 GPM 120,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater RTGH-68DVLN-3
Rheem

RTGH Series 6.8 GPM 120,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater

Zoro # G510947854
Mfr # RTGH-68DVLN-3
product price:  $1,219.99
/ea
Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater RTGH-84DVLP-3
Rheem

RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater

Zoro # G410947848
Mfr # RTGH-84DVLP-3
product price:  $1,188.00
/ea
Rheem Gas Tankless Water Heater, Natural Gas RTGH-S11i
Rheem

Gas Tankless Water Heater, Natural Gas

Zoro # G511677668
Mfr # RTGH-S11i
product price:  $1,520.09
/ea
Rheem RTG 9.5 GPM 199,900 BTU 120 Volt Residential Outdoor Natural Gas Tankless Water Heater RTG-95XLN-3
Rheem

RTG 9.5 GPM 199,900 BTU 120 Volt Residential Outdoor Natural Gas Tankless Water Heater

Zoro # G021718578
Mfr # RTG-95XLN-3
product price:  $1,242.99
/ea
Rheem RTGH Series 9 GPM 180,000 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater RTGH-90DVLP-3
Rheem

RTGH Series 9 GPM 180,000 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater

Zoro # G910947850
Mfr # RTGH-90DVLP-3
product price:  $1,339.99
/ea
Richmond Essential Plus RMTG Series RMTG-95XELP-3 Outdoor Tankless Water Heater with Wi-Fi, Liquid Propane RMTG95XELP-3
Richmond

Essential Plus RMTG Series RMTG-95XELP-3 Outdoor Tankless Water Heater with Wi-Fi, Liquid Propane

Zoro # G016038308
Mfr # RMTG95XELP-3
product price:  $1,599.99
/ea
Rheem RTG 7 GPM 160,000 BTU 12 Volt Residential Indoor Natrual Gas Tankless Water Heater RTG-70DVLN-3
Rheem

RTG 7 GPM 160,000 BTU 12 Volt Residential Indoor Natrual Gas Tankless Water Heater

Zoro # G121718560
Mfr # RTG-70DVLN-3
product price:  $804.99
/ea
Rheem RTG 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater RTG-95DVLP-3
Rheem

RTG 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater

Zoro # G821718570
Mfr # RTG-95DVLP-3
product price:  $1,242.99
/ea
Mizudo 5.1-GPM Propane Gas Tankless Water Heater, Residential, 120, 000-BTU, Outdoor Installation only FDG-CS120SBW-LP
Mizudo

5.1-GPM Propane Gas Tankless Water Heater, Residential, 120, 000-BTU, Outdoor Installation only

Zoro # G115189802
Mfr # FDG-CS120SBW-LP
product price:  $599.99
/ea
Rheem RTG 8.4 GPM 180,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater RTG-84DVLN-3
Rheem

RTG 8.4 GPM 180,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater

Zoro # G321718575
Mfr # RTG-84DVLN-3
product price:  $1,246.99
/ea
Rheem Gas Tankless Water Heater, 56.7 in H RTRS-WH220DVLN
Rheem

Gas Tankless Water Heater, 56.7 in H

Zoro # G916389210
Mfr # RTRS-WH220DVLN
product price:  $6,909.99
/ea
Rheem RTG 8.4 GPM 180,000 BTU 120 Volt Residential Outdoor Natural Gas Tankless Water Heater RTG-84XLN-3
Rheem

RTG 8.4 GPM 180,000 BTU 120 Volt Residential Outdoor Natural Gas Tankless Water Heater

Zoro # G021718561
Mfr # RTG-84XLN-3
product price:  $1,189.99
/ea
Furrion Water Heater Access Door FWH09EA-PS-AM
Furrion

Water Heater Access Door

Zoro # G607057275
Mfr # FWH09EA-PS-AM
product price:  $72.92
/ea
Mrcool Natural Gas Tankless Water Heater MHWH199NCNU
Mrcool

Natural Gas Tankless Water Heater

Zoro # G007461276
Mfr # MHWH199NCNU
product price:  $1,789.99
/ea
Rheem Gas Tankless Water Heater, Natural Gas RTG-95DVLN-3 / 701258
Rheem

Gas Tankless Water Heater, Natural Gas

Zoro # G912486173
Mfr # RTG-95DVLN-3 / 701258
product price:  $1,860.99
/ea
Noritz 199 MBH Indoor Non-Condensing Natural Gas Tankless Water Heater, 9.8 GPM GQ-2857WX-FUSNG
Noritz

199 MBH Indoor Non-Condensing Natural Gas Tankless Water Heater, 9.8 GPM

Zoro # G821718556
Mfr # GQ-2857WX-FUSNG
product price:  $2,423.99
/ea
Noritz 120 MBH Outdoor Non-Condensing Natural Gas Tankless Water Heater, 5 GPM NR501-OD-NG
Noritz

120 MBH Outdoor Non-Condensing Natural Gas Tankless Water Heater, 5 GPM

Zoro # G121718577
Mfr # NR501-OD-NG
product price:  $1,009.99
/ea
Mizudo 5.1-GPM Natural Gas Tankless Water Heater, Residential Indoor, 120,000-BTU FDG-CS120BW-NG
Mizudo

5.1-GPM Natural Gas Tankless Water Heater, Residential Indoor, 120,000-BTU

Zoro # G815189799
Mfr # FDG-CS120BW-NG
product price:  $599.99
/ea
Mrcool Liquid Propane Tankless Water Heater MHWH199NCLU
Mrcool

Liquid Propane Tankless Water Heater

Zoro # G107461275
Mfr # MHWH199NCLU
product price:  $1,799.99
/ea
Rheem Gas Tankless Water Heater, 56.7 in H RTRS-WH220XLP
Rheem

Gas Tankless Water Heater, 56.7 in H

Zoro # G016389196
Mfr # RTRS-WH220XLP
product price:  $6,909.99
/ea
Richmond Rheem Tankless Water Heater with Wi-Fi, LPG, 199,900 Btu/hr BTU, 9.5 gpm RMTGH95DVELP-3
Richmond

Rheem Tankless Water Heater with Wi-Fi, LPG, 199,900 Btu/hr BTU, 9.5 gpm

Zoro # G816567411
Mfr # RMTGH95DVELP-3
product price:  $2,299.99
/ea
No Product Image Available
Rheem

Gas Tankless Water Heater

Zoro # G321679395
Mfr # RTGH-CS11i
product price:  $2,423.99
/ea
Rheem Gas Tankless Water Heater, 54.3 in H RTRS-FS420XLN
Rheem

Gas Tankless Water Heater, 54.3 in H

Zoro # G516389122
Mfr # RTRS-FS420XLN
product price:  $8,099.99
/ea
Rheem Gas Tankless Water Heater, 54.3 in H RTRS-WH330DVLN
Rheem

Gas Tankless Water Heater, 54.3 in H

Zoro # G416389215
Mfr # RTRS-WH330DVLN
product price:  $9,559.99
/ea
Rheem Gas Tankless Water Heater, 54.3 in H RTRS-FS411DVLN
Rheem

Gas Tankless Water Heater, 54.3 in H

Zoro # G416389284
Mfr # RTRS-FS411DVLN
product price:  $8,099.99
/ea
Rheem Gas Tankless Water Heater, 54.3 in H RTRS-FS420DVLN
Rheem

Gas Tankless Water Heater, 54.3 in H

Zoro # G816389242
Mfr # RTRS-FS420DVLN
product price:  $8,099.99
/ea
Eccotemp L5 Portable Outdoor 1.5 GPM Tankless Water Heater L5
Eccotemp

L5 Portable Outdoor 1.5 GPM Tankless Water Heater

Zoro # G302751621
Mfr # L5
product price:  $176.39
/ea
Noritz 199 MBH Indoor condensing Natural Gas Tankless Water Heater GQ-C3260WZ-FFUSNG
Noritz

199 MBH Indoor condensing Natural Gas Tankless Water Heater

Zoro # G421718567
Mfr # GQ-C3260WZ-FFUSNG
product price:  $3,308.99
/ea
Eccotemp L10  Portable Outdoor 3.0 GPM Tankless Water Heater L10
Eccotemp

L10 Portable Outdoor 3.0 GPM Tankless Water Heater

Zoro # G102751685
Mfr # L10
product price:  $369.99
/ea
Eccotemp Luxe 1.5 GPM 37.5K BTU Outdoor Portable Tankless Water Heater with LED Display EL5
Eccotemp

Luxe 1.5 GPM 37.5K BTU Outdoor Portable Tankless Water Heater with LED Display

Zoro # G002751631
Mfr # EL5
product price:  $231.99
/ea
Eccotemp L5 Portable Outdoor Tankless Water Heater w/ EccoFlo Diaphragm 12V Pump & Strainer L5-PS
Eccotemp

L5 Portable Outdoor Tankless Water Heater w/ EccoFlo Diaphragm 12V Pump & Strainer

Zoro # G402751651
Mfr # L5-PS
product price:  $271.99
/ea
Eccotemp Luxe 1.5 GPM Outdoor Portable Tankless Water Heater w/ EccoFlo 12V Pump and Strainer EL5-PS
Eccotemp

Luxe 1.5 GPM Outdoor Portable Tankless Water Heater w/ EccoFlo 12V Pump and Strainer

Zoro # G102751630
Mfr # EL5-PS
product price:  $289.99
/ea
Eccotemp Luxe 1.85 GPM Outdoor Portable Tankless Water Heater w/ EccoFlo 12V Pump and Strainer EL7-PS
Eccotemp

Luxe 1.85 GPM Outdoor Portable Tankless Water Heater w/ EccoFlo 12V Pump and Strainer

Zoro # G502751650
Mfr # EL7-PS
product price:  $317.99
/ea
Noritz 199 MBH Outdoor Condensing Natural Gas Tankless Water Heater, 11.1 gpm GQ-C3257WXUSNG
Noritz

199 MBH Outdoor Condensing Natural Gas Tankless Water Heater, 11.1 gpm

Zoro # G521718580
Mfr # GQ-C3257WXUSNG
product price:  $2,290.99
/ea
Gas Tankless Water Heaters (139 items) - Page 2
  • First
  • Previous
  • 2
    of 4 pages
  • Next
  • Last

About Gas Tankless Water Heaters

Gas Tankless Water Heaters are an efficient and convenient way to provide hot water on demand. Rather than storing hot water in a tank, these units use natural gas or liquid propane to heat water as it passes through the unit. This means you can have endless hot water without worrying about running out or wasting energy. Gas Tankless Water Heaters are popular in both residential and commercial settings due to their energy efficiency, space-saving design, and long lifespan.

Types of Gas Tankless Water Heaters

Gas Tankless Water Heaters come in both indoor and outdoor models, and can be powered by either natural gas or liquid propane. The type of gas used can impact the unit's efficiency and cost, so it's important to choose the right type for your needs. Residential units typically run on 120V or 240V electricity, while commercial units may require higher voltage. Outdoor units are typically more expensive but do not require venting, while indoor units require proper ventilation to prevent carbon monoxide buildup.

How Gas Tankless Water Heaters are Made

Gas Tankless Water Heaters are typically made with a heat exchanger, which heats the water as it passes through. The heat exchanger is made of materials such as copper, stainless steel, or aluminum, which are chosen for their ability to transfer heat efficiently. The units also include a burner, which is fueled by natural gas or liquid propane, and a computer control module, which regulates the unit's temperature and flow rate. Some units may also include additional features such as a recirculation pump or condensing technology to further increase efficiency.

Industries that use Gas Tankless Water Heaters

Gas Tankless Water Heaters are commonly used in industries such as hospitality, food service, and healthcare, where hot water is needed on demand for tasks such as cooking, cleaning, and bathing. In residential settings, they are popular in homes with multiple bathrooms or large families who need a steady supply of hot water. They are also used in commercial settings such as laundromats, car washes, and factories, where hot water is needed for a variety of applications. Gas Tankless Water Heaters are often installed by licensed professionals who can ensure proper ventilation, gas line connections, and electrical wiring.

Find the Gas Tankless Water Heaters You Need at Zoro

Looking for a specific item? Use our robust search tool to find it by name or keyword, or use our handy filters to narrow down our full assortment. You can also check out our whole selection of plumbing tools & supplies, along with other equipment and essentials to ensure you have all you need to tackle the job, especially if you're taking on a DIY project for the first time.
Plus, when you shop at Zoro, you'll always enjoy competitive prices on tons of great brands you know and trust. We make the shopping experience as fast and seamless as possible with free shipping on orders over $50 for registered users, Net 30 payment terms for qualifying customers, and an unparalleled customer service experience.

Related Categories

Water Heater PartsWater Heater VentsElectric Tankless Water HeatersPoint of Use Water HeatersValves
Plumbing Parts & AccessoriesTube FittingsFittingsSupply LinesPipes
rinnai tanklesspropane igniterwater heater propanerinnai wall heaterrheem rtg-95dvln-1
tankless water heatertankless water heater lpwater heater commercialrinnai water heater partsrinnai water heater

Sign Up & Save

Take 10% off your next order when you sign up for Zoro emails. Subscribe now to receive your promo code via email.

Follow Us

  • Facebook
  • YouTube
  • LinkedIn
  • Instagram
Every Part Plays a Part

Information

  • About Us
  • Accessibility
  • Careers
  • Inclusion
  • Giving Back
  • Resource Hub
  • Returns
  • Shipping

Shopping

  • Brands
  • Collections
  • My Account
  • Payments
  • Promo Codes
  • Sitemap
  • Track My Order

Services

  • Customer Service
  • FAQs
  • Net 30 Terms
  • Reseller Program
  • Sell on Zoro
  • Participate in Research

Zoro, Inc

Connect

Customer Service From Real People

  • Phone: (855) 289-9676
  • Contact Us

© 2011-2026 Zoro Tools, Inc. All rights reserved.
  • Terms & Conditions
  • Terms of Access
  • Privacy Policy
Zoro, Inc