We Use Cookies

We use cookies to enhance the security, performance, functionality and for analytical and promotional activities. We use cookies to personalize ads for you. By continuing to browse this site you're agreeing to our Privacy Policy

Filter by

Pricing range

$163

$2,153

Pricing

Store

Condition

Filter by brand

Other

best dealsdiscountsbest tankless gas water heaters
Best Best tankless gas water heaters Deals in the United States

Today's best

deals, discounts, and offers

20 deals found

Sort by:

Deals are available from 2 stores and 4 brands. An additional discount is available for 0 items. Last updated on September 23, 2025.
Stiebel Eltron 222039 Mini 4 Point-of-Use Tankless Electric Water Heater - 208V, 3.5 kW, 0.40 GPM
Stiebel Eltron 222039 Mini 4 Point-of-Use Tankless Electric Water Heater - 208V, 3.5 kW, 0.40 GPM
Stiebel Eltron 222039 Mini 4 Point-of-Use Tankless Electric Water Heater - 208V, 3.5 kW, 0.40 GPM
New
Free Shipping
View Deal
Stiebel Eltron 232099 Mini 3.5 Point-of-Use Tankless Electric Water Heater - 3.5 kW, 0.40 GPM
Stiebel Eltron 232099 Mini 3.5 Point-of-Use Tankless Electric Water Heater - 3.5 kW, 0.40 GPM
Stiebel Eltron 232099 Mini 3.5 Point-of-Use Tankless Electric Water Heater - 3.5 kW, 0.40 GPM
New
Free Shipping
View Deal
Stiebel Eltron 220816 Mini 3 Point-of-Use Tankless Electric Water Heater - 3.0 kW, 0.40 GPM
Stiebel Eltron 220816 Mini 3 Point-of-Use Tankless Electric Water Heater - 3.0 kW, 0.40 GPM
Stiebel Eltron 220816 Mini 3 Point-of-Use Tankless Electric Water Heater - 3.0 kW, 0.40 GPM
New
Free Shipping
View Deal
WEBSTONE 54443WPR Tankless Water Heater Valve,3/4 In,Brass
WEBSTONE 54443WPR Tankless Water Heater Valve,3/4 In,Brass
WEBSTONE 54443WPR Tankless Water Heater Valve,3/4 In,Brass
New
Free Shipping
View Deal
STIEBEL ELTRON MINI 4 Commercial Electric Tankless Water Heater, Undersink, 82
STIEBEL ELTRON MINI 4 Commercial Electric Tankless Water Heater, Undersink, 82
STIEBEL ELTRON MINI 4 Commercial Electric Tankless Water Heater, Undersink, 82
New
Free Shipping
View Deal
CHRONOMITE M40L/240HTR 110F-I 240VAC, 40 Amps, Both Electric Tankless Water
CHRONOMITE M40L/240HTR 110F-I 240VAC, 40 Amps, Both Electric Tankless Water
CHRONOMITE M40L/240HTR 110F-I 240VAC, 40 Amps, Both Electric Tankless Water
New
Free Shipping
View Deal
Stiebel Eltron 202654 DHC Classic Copper Point-of-Use Tankless Electric Water Heater - 277V, 9 kW
Stiebel Eltron 202654 DHC Classic Copper Point-of-Use Tankless Electric Water Heater - 277V, 9 kW
Stiebel Eltron 202654 DHC Classic Copper Point-of-Use Tankless Electric Water Heater - 277V, 9 kW
New
Free Shipping
View Deal
Eccotemp SH22-NG SmartHome Natural Gas Wi-Fi Enabled Outdoor Tankless Water Heater with Mobile App and Voice Command - 120V, 6.8 GPM
Eccotemp SH22-NG SmartHome Natural Gas Wi-Fi Enabled Outdoor Tankless Water Heater with Mobile App and Voice Command - 120V, 6.8 GPM
Eccotemp SH22-NG SmartHome Natural Gas Wi-Fi Enabled Outdoor Tankless Water Heater with Mobile App and Voice Command - 120V, 6.8 GPM
New
Free Shipping
View Deal
Stiebel Eltron 202651 DHC 6-2 Classic Point-of-Use Tankless Electric Water Heater - 208/240V, 4.5/6.0kW, 0.48 GPM
Stiebel Eltron 202651 DHC 6-2 Classic Point-of-Use Tankless Electric Water Heater - 208/240V, 4.5/6.0kW, 0.48 GPM
Stiebel Eltron 202651 DHC 6-2 Classic Point-of-Use Tankless Electric Water Heater - 208/240V, 4.5/6.0kW, 0.48 GPM
New
Free Shipping
View Deal
Stiebel Eltron 202652 DHC Classic Copper Point-of-Use Tankless Electric Water Heater - 277V, 6 kW
Stiebel Eltron 202652 DHC Classic Copper Point-of-Use Tankless Electric Water Heater - 277V, 6 kW
Stiebel Eltron 202652 DHC Classic Copper Point-of-Use Tankless Electric Water Heater - 277V, 6 kW
New
Free Shipping
View Deal
Stiebel Eltron 202648 DHC 4-2 Classic Point-of-Use Tankless Electric Water Heater - 208/240V, 2.9/3.8kW, 0.43 GPM
Stiebel Eltron 202648 DHC 4-2 Classic Point-of-Use Tankless Electric Water Heater - 208/240V, 2.9/3.8kW, 0.43 GPM
Stiebel Eltron 202648 DHC 4-2 Classic Point-of-Use Tankless Electric Water Heater - 208/240V, 2.9/3.8kW, 0.43 GPM
New
Free Shipping
View Deal
Eccotemp 6GB-ING Natural Gas Indoor Tankless Water Heater - 110/120V, 6.0 GPM
Eccotemp 6GB-ING Natural Gas Indoor Tankless Water Heater - 110/120V, 6.0 GPM
Eccotemp 6GB-ING Natural Gas Indoor Tankless Water Heater - 110/120V, 6.0 GPM
New
Free Shipping
View Deal
Eccotemp 7GB-NG Natural Gas Outdoor Tankless Water Heater - 110/120V, 7.0 GPM
Eccotemp 7GB-NG Natural Gas Outdoor Tankless Water Heater - 110/120V, 7.0 GPM
Eccotemp 7GB-NG Natural Gas Outdoor Tankless Water Heater - 110/120V, 7.0 GPM
New
Free Shipping
View Deal
Eccotemp 6.8GB-NG 6.8 GB Series Natural Gas Outdoor Wall-Mounted Tankless Water Heater - 110/120V, 6.8 GPM
Eccotemp 6.8GB-NG 6.8 GB Series Natural Gas Outdoor Wall-Mounted Tankless Water Heater - 110/120V, 6.8 GPM
Eccotemp 6.8GB-NG 6.8 GB Series Natural Gas Outdoor Wall-Mounted Tankless Water Heater - 110/120V, 6.8 GPM
New
Free Shipping
View Deal
Eccotemp SH12-A-NG SmartHome Natural Gas WiFi Enabled Indoor Tankless Water Heater with Mobile App and Voice Command - 120V, 4.0 GPM
Eccotemp SH12-A-NG SmartHome Natural Gas WiFi Enabled Indoor Tankless Water Heater with Mobile App and Voice Command - 120V, 4.0 GPM
Eccotemp SH12-A-NG SmartHome Natural Gas WiFi Enabled Indoor Tankless Water Heater with Mobile App and Voice Command - 120V, 4.0 GPM
New
Free Shipping
View Deal
BestDeals.today is customer-supported. When you buy products through our site, we may earn an affiliate commission on featured products.