JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser.

We are closed on Friday, July 4th, 2025 for Independence Day weekend and reopening Monday July 7th, 2025. Enjoy and be safe.

Toggle Nav

Search

We ship to most places in continental USA

Chat with us

Need help

Our Locations

Home
HVAC
Water Heaters

Water Heaters

Tankless X

Gallon

Fuel Type

Heater Type

Brands

TAKAGI Solo

Natural Gas

Commercial Grade Copper Heat Exchanger

Condensing Water Heater

Direct Vent

10 GPM

5 Years

Energy Star
Retail : $2,552.00 $1,658.80

You Save (35%)
Takagi TK-540P-NIH 199,000 Btu Natural Gas Indoor Condensing Ultra-Low Nox
2552.001658.80
199 MBtu
TK-540P-NIH
In Stock
Qty:
TAKAGI Tk110U

Natural Gas

Copper Heat Exchanger

Condensing Water Heater

Direct Vent

6.6 GPM

5 Years

Energy Star
Retail : $1,238.00 $804.70

You Save (35%)
Takagi TK-110U-E-NG Series 200 - 140,000 Btu Natural Gas/Liquid Propane Outdoor Non-Condensing Ultra-Low Nox
1238.00804.70
140 MBtu
6.6 GPM
TK-110U-E-NG
In Stock

Takagi TK-310U-E-NG Series 200 - 190,000 Btu Natural Gas/Liquid Propane Outdoor Non-Condensing Ultra-Low Nox
1592.001034.80
190 MBtu
8 GPM
TK-310U-E-NG

Takagi TK-510U-E-NG Series 200 - 199,000 Btu Natural Gas/Liquid Propane Outdoor Non-Condensing Ultra-Low Nox
1960.001274.00
199 MBtu
10 GPM
TK-510U-E-NG
Qty:
AO Smith ATO H - Tankless Water Heaters (NG)

Natural Gas

Power Direct Vent
Retail : $2,374.00 $1,376.92

You Save (42%)
AO Smith ATO-240H-N Tankless Natural Gas Water Heater, 160,000 BTU, Power Direct Vent, 15 Yr Heat Exchanger/5 Parts Warranty
1912.001529.60
160 MBtu
ATO-240H-N

AO Smith ATO-340H-N Tankless Natural Gas Water Heater, 180,000 BTU, Power Direct Vent, 15 Yr Heat Exchanger/5 Parts Warranty
2136.001708.80
180 MBtu
ATO-340H-N

AO Smith ATO-540H-N 199,000 Btu Residential/Commercial Condensing Natural Gas Outdoor Tankless Water Heater, 15 Yr Heat Exc / 5 Pts Warranty
2374.001376.92
199 MBtu
ATO-540H-N
In Stock
Qty:
Eemax Tankless Water
Retail : $258.36 $174.39

You Save (33%)
HHP HHP55240 5.5KW 240V Single Point Tankless Water Heater equivalent to Eemax SP55
258.36174.39
240V
HHP55240
In Stock
Qty:
Eemax Home Advantage Series Water Heater

Electric
Retail : $344.72 $232.69

You Save (32%)
Eemax HA011240 240V 11 kW Electric Tankless Water Heater
409.86276.66
11 KW
HA011240

Eemax HA013240 240V 13 kW Electric Tankless Water Heater
568.98384.06
13 KW
HA013240

Eemax HA018240 240V 18 kW Electric Tankless Water Heater
639.00431.32
18 KW
HA018240

Eemax HA024240 240V 24 kW Electric Tankless Water Heater
780.44526.80
24 KW
HA024240

Eemax HA027240 240V 27 kW Electric Tankless Water Heater
1009.26681.25
27 KW
HA027240

Eemax HA036240 240V 36 kW Electric Tankless Water Heater
1283.86866.61
36 KW
HA036240

Eemax HA008240 240V 8.0 kW Electric Tankless Water Heater
344.72232.69
8 KW
HA008240
In Stock
Qty:
Rheem RTEX Classic Series Water Heaters

Electric
Retail : $1,640.78 $1,148.55

You Save (30%)
Rheem RTEX-18 Classic 240 Voltage 18.0 KW Residential Electric 2 Heating Chamber Tankless Water Heater - 5 Year Warranty
816.64571.65
18 KW
RTEX-18

Rheem RTEX-24 Classic 240 Voltage 24.0 KW Residential Electric 3 Heating Chamber Tankless Water Heater - 5 Year Warranty
997.40698.18
24 KW
RTEX-24

Rheem RTEX-27 Classic 240 Voltage 27.0 KW Residential Electric 3 Heating Chamber Tankless Water Heater - 5 Year Warranty
1289.84902.89
27 KW
RTEX-27

Rheem RTEX-36 Classic 240 Voltage 36.0 KW Residential Electric 4 Heating Chamber Tankless Water Heater - 5 Year Warranty
1640.781148.55
36 KW
RTEX-36
In Stock
Qty:
Eemax Series Two Tankless Water Heaters

Electric
Retail : $864.40 $690.44

You Save (20%)
Eemax EX1608TC 16.6KW 208V, Series Two Residential / Commercial Electric Tankless Water Heater
864.40690.44
16.6 KW
EX1608TC
In Stock
Qty:
Eemax One™ Electric Tankless Water Heater

Electric
Retail : $331.20 $264.55

You Save (20%)
Eemax SP2412 One™ 2.4 Kw Single Point Electric Tankless Water Heater
331.20264.55
2.4KW
SPEX2412
In Stock
Qty:
AO Smith ATI H - Tankless Water Heaters (NG)

Natural Gas

Power Direct Vent
Retail : $2,374.00 $1,899.20

You Save (20%)
AO Smith ATI-240H-N Tankless Natural Gas Water Heater, 160,000 BTU, Power Direct Vent, 15 Yr Heat Exchanger/5 Parts Warranty
1912.001529.60
160 MBtu
ATI-240H-N
In Stock

AO Smith ATI-340H-N Tankless Natural Gas Water Heater, 180000 BTU, Power Direct Vent, 15 Yr Heat Exc / 5 Pts Warranty
2136.001708.80
180 MBtu
ATI-340H-N
In Stock

AO Smith ATI-540H-N Tankless Natural Gas Water Heater, 199000 BTU, Power Direct Vent, 15 Yr Heat Exc / 5 Pts Warranty
2374.001899.20
199 MBtu
ATI-540H-N
In Stock
Qty:
Lochinvar Power-Fin Series - Water Heaters

Natural Gas

Copper-Finned Tube Heat Exchanger

Standard Vent

85% Efficiency

5 Year Warranty
Retail : $20,594.00 $16,199.24

You Save (21%)
Lochinvar PFN0502PMM9 Power-Fin 500 Input MBtu Commercial Natural Gas Water Heater - Direct Vent - 5 Year Warranty
20594.0016199.24
500 MBtu
PFN-0502PM-M9
In Stock
Qty:
Lochinvar EnergyRite 3 Years

Natural Gas

Commercial-Grade Heat Exchanger

Indoor and Outdoor Vent Option
Retail : $5,587.00 $4,394.73

You Save (21%)
Lochinvar ERN152 EnergyRite 150 Input MBtu Residential/Commercial Natural Gas Pool and Spa Heater - 3 Year Warranty
4118.003239.22
150 MBtu
ERN152
In Stock

Lochinvar ERN252 EnergyRite 250 Input MBtu Residential/Commercial Natural Gas Pool and Spa Heater - 3 Year Warranty
4752.003737.92
250 MBtu
E-RITE-5

Lochinvar ERN302 EnergyRite 300 Input MBtu Residential/Commercial Natural Gas Pool and Spa Heater
4977.003695.00
300 MBtu
E-RITE-5
In Stock

Lochinvar ERN402 EnergyRite 399 Input MBtu Residential/Commercial Natural Gas Pool and Spa Heater - 3 Year Warranty
5587.004394.73
399 MBtu
E-RITE-5
In Stock
Qty:
Rheem RTG Series Direct vent - Water Heaters (NG)

Natural Gas

Direct Vent
Retail : $1,614.24 $953.00

You Save (41%)
Rheem RTG-84DVLN-1 RTG 180 Input MBtu Low Nox Indoor Residential Natural Gas Tankless Water Heater - Direct Vent - 12 Year Warranty
1614.24953.00
180 MBtu
RTG-84DVLN-1
In Stock

Rheem RTG-95DVLN-1 RTG 199 Input MBtu Low Nox Indoor Residential Natural Gas Tankless Water Heater - Direct Vent - 12 Year Warranty
2016.301243.00
199 MBtu
0.26 GPM
RTG-95DVLN-1
Qty:
Rheem Prestige 12 Years - Indoor - Direct Vent - Natural Gas

Natural Gas

Residential Water Heater

Direct Vent

0.26 GPM

12 Year Warranty
Retail : $1,894.60 $1,188.00

You Save (37%)
Rheem RTGH-84DVLN-2 Prestige 157 Input MBtu Low Nox Indoor Residential Natural Gas Tankless Water Heater - Direct Vent - 12 Year Warranty
1894.601188.00
157 MBtu
0.26 GPM
RTGH-84DVLN-2
In Stock

Rheem RTGH-90DVLN-2 Prestige 120 Input MBtu Low Nox Indoor Residential Natural Gas Tankless Water Heater - Direct Vent - 12 Year Warranty
1996.361137.93
180 MBtu
RTGH-90DVLN-2
Qty:
Rheem Prestige 12 Years - Indoor - Direct Vent - Liquid Propane

Liquid Propane

Direct Vent

0.26 GPM

12 Year Warranty
Retail : $1,894.60 $1,188.00

You Save (37%)
Rheem RTGH-95DVLP-2 Prestige 199 Input MBtu Low Nox Indoor Residential Liquid Propane Tankless Water Heater - Direct Vent - 12 Year Warranty
1970.001499.00
199 MBtu
0.26 GPM
RTGH-95DVLP-2
In Stock

Rheem RTGH-84DVLP-2 Prestige 157 Input MBtu Low Nox Indoor Residential Liquid Propane Tankless Water Heater - Direct Vent - 12 Year Warranty
1894.601188.00
157 MBtu
0.26 GPM
RTGH-84DVLP-2
In Stock

Rheem RTGH-90DVLP-2 Prestige 180 Input MBtu Low Nox Indoor Residential Liquid Propane Tankless Water Heater - Direct Vent - 12 Year Warranty
1996.361137.93
180 MBtu
RTGH-90DVLP-2
Qty:
Rheem Prestige 12 Years - Outdoor - Natural Gas

Natural Gas

Residential Water Heater

0.26 GPM

12 Year Warranty
Retail : $1,894.60 $1,079.92

You Save (43%)
Rheem RTGH-84XLN-2 Prestige 157 Input MBtu Low Nox Outdoor Residential Natural Gas Tankless Water Heater - 12 Year Warranty
1894.601079.92
157 MBtu
0.26 GPM
RTGH-84XLN-2
In Stock

Rheem RTGH-95XLN-2 Prestige 199 Input MBtu Low Nox Outdoor Residential Natural Gas Tankless Water Heater - 12 Year Warranty
2118.281207.42
199 MBtu
0.26 GPM
RTGH-95XLN-2
Qty:
AO Smith Cer-Temp - Natural Gas

Natural Gas

Commercial Water Heater

5 Year Warranty
Retail : $4,952.00 $4,456.80

You Save (10%)
AO Smith HW-200M Burkay 199 Input MBtu Commercial Natural Gas Circulating Water Heater - 5 Year Warranty
4952.004456.80
200 MBtu
HW-200M
In Stock

AO Smith HW-225M Burkay 225 Input MBtu Commercial Natural Gas Circulating Water Heater - 5 Year Warranty
5652.005086.80
225 MBtu
HW-225M
In Stock
Qty:
Takagi T-H3J - Indoor Water Heaters (NG)

Natural Gas

Copper & Stainless Heat Exchanger

Condensing Water Heater

Direct Vent

6.6 GPM

5 Years

Energy Star
Retail : $1,738.00 $1,043.02

You Save (40%)
Takagi T-H3J-DV-NG Residential Condensing 160000 BTU Indoor Water Heater - Natural Gas
1738.001043.02
160 MBtu
6.6 GPM
T-H3J-DV-NG
In Stock

Takagi T-H3-DV-NG 199000 BTU Input Direct Vent Indoor Whole House Tankless Water Heater With Natural Gas
2158.001402.70
199 MBtu
10 GPM
T-H3-DV-NG
Qty:
Lochinvar Armor® Natural Gas Water Heater - Direct Vent (Pump Supplied)

Natural Gas

98% Efficiency
Retail : $42,567.00 $30,133.18

You Save (29%)
Lochinvar AWH0400N-PM Armor® 399 Input MBtu 99% AFUE - Commercial Natural Gas Condensing Water Heater - Direct Vent (Pump Supplied)
22886.0016201.00
399 MBtu

Lochinvar AWH0500N-PM Armor® 500 Input MBtu 99% AFUE - Commercial Natural Gas Condensing Water Heater - Direct Vent (Pump Supplied)
26246.0018579.54
500 MBtu
In Stock

Lochinvar AWH0800N-PM Armor® 800 Input MBtu 98% AFUE - Commercial Natural Gas Condensing Water Heater - Direct Vent (Pump Supplied)
42567.0030133.18
800 MBtu
Qty:
AO Smith R4MA 4-Chamber Electric Tankless Water Heater

Electric
Retail : $633.04 $506.43

You Save (20%)
AO Smith R4LA-180E 18 Kilowatt 240 Volt 4-Chamber Residential Electric Tankless Water Heater
633.04506.43
18 KW
100293891
In Stock

AO Smith R4LA-240E 24 Kilowatt 240 Volt 4-Chamber Residential Electric Tankless Water Heater
773.14618.51
24 KW
100294820
In Stock

AO Smith R4LA-280E 28 Kilowatt 240 Volt 4-Chamber Residential Electric Tankless Water Heater
999.84799.87
28 KW
R4LA-280E
In Stock

AO Smith R4MA-320E 32 Kilowatt 240 Volt 4-Chamber Residential Electric Tankless Water Heater
1068.36854.69
32 KW
100294797
In Stock
Qty:
AO Smith ProLine®

Electric

Commercial Water Heater

5 Years Warranty
Out of Stock
Retail : $766.48 $613.18

You Save (20%)

Qty:
Rheem RTGH Series - Indoor Tankless Water Heater

Natural Gas
Retail : $1,970.00 $1,122.90

You Save (43%)
Rheem RTGH-95DVLN-3 RTGH Series 199 Input MBtu Super High-Efficiency Indoor Condensing Tankless Natural Gas Water Heater
1970.001122.90
199 MBtu
Qty:
Bosch Tankless Water Heaters NG

Natural Gas

Direct Vent

94% Efficiency
Retail : $7,298.00 $3,607.40

You Save (51%)
Bosch 7703311073 Therm C 1210 ES NG 225 Input MBtu, Condensing, Commercial/Residential, Indoor, Tankless Water Heater, Natural Gas
7298.003607.40
225 MBtu
Qty:
AO Smith ATIO - Tankless Water Heater

Natural Gas

Commercial Water Heaters

Direct Vent

80% Efficiency

6 Year Heat Exchanger Warranty
$0.00
AO Smith ATIO-910-N 380 Input MBtu, 80% AFUE, Non-Condensing, Commercial Natural Gas Tankless, Water Heater, Low NOx Direct Vent, Indoor/Outdoor, 6-Year Heat Exchanger/5 Year Parts Warranty
5970.004776.00
380 MBtu
Qty:
AO Smith ATI U - Tankless Water Heaters

Natural Gas

Non-Condensing

Concentric Vent

15 Year Limited Warranty
Retail : $2,170.00 $1,736.00

You Save (20%)
AO Smith ATI-510C-N ProLine® XE, 199 Input MBtu, Non-Condensing, Residential Natural Gas Tankless Water Heater, Concentric Vent, Indoor, 15 Year limited Heat Exchanger/5 Year Parts Warranty
1972.001577.60
199 MBtu
Qty:
Laars TLMT2V

Gas, Water

Cast Iron Heat Exchanger

85% Efficiency

With Pump
Retail : $12,391.00 $9,293.25

You Save (25%)
Laars MT2V-200 Mighty Therm2 Residential/Commercial 199,900 BTU Natural Gas/Liquid Propane Water Heater
11247.008435.25
199 MBtu
MT2V-200

Laars MT2V-300 Mighty Therm2 300 Input MBtu - 85% AFUE Commercial Natural Gas Water Heater - With Pump
12391.009293.25
300 MBtu
MT2V-300

Laars MT2V-400 Mighty Therm2 400 Input MBtu - 85% AFUE Commercial Natural Gas Water Heater - With Pump
13269.009951.75
400 MBtu
MT2V-400
In Stock
Qty:
AO Smith ATO H - Tankless Water Heaters (LP)

Liquid Propane, Water

Stainless Steel Heat Exchanger

Power Direct Vent
Retail : $2,136.00 $1,708.80

You Save (20%)
AO Smith ATO-240H-P Tankless Propane Water Heater, 160,000 BTU, Power Direct Vent, 15 Yr Heat Exchanger/5 Parts Warranty
1912.001529.60
160 MBtu
ATO-240H-P

AO Smith ATO-340H-P Tankless Propane Water Heater, 180,000 BTU, Power Direct Vent, 15 Yr Heat Exchanger/5 Parts Warranty
2136.001708.80
180 MBtu
ATO-340H-P
Qty:
AO Smith ATI H - Tankless Water Heaters (LP)

Liquid Propane, Water

Stainless Steel Heat Exchanger

Power Direct Vent
Retail : $1,912.00 $1,529.60

You Save (20%)
AO Smith ATI-240H-P Tankless Propane Water Heater, 160,000 BTU, Power Direct Vent, 15 Yr Heat Exchanger/5 Parts Warranty
1912.001529.60
160 MBtu
ATI-240H-P

AO Smith ATI-340H-P ATI 180 Input MBtu Liquid Propane Condensing water Heater - Tankless - Power Direct Vent
2136.001708.80
180 MBtu
ATI-340H-P
Qty:
AO Smith ATI H - Tankless Water Heater (LP)

Liquid Propane, Water

Stainless Steel Heat Exchanger

Power Direct Vent
Retail : $1,580.00 $1,264.00

You Save (20%)
AO Smith ATI-140H-P Tankless Propane Water Heater, 140,000 BTU, Power Direct Vent, 15 Yr Heat Exchanger/5 Parts Warranty
1580.001264.00
140 MBtu
ATI-140H-P
Qty:
AO Smith ATO U - Tankless Water Heaters (NG)

Gas, Water

Stainless Steel Heat Exchanger

Power Direct Vent
Retail : $2,156.00 $1,724.80

You Save (20%)
AO Smith ATO-110U Tankless Natural Gas Water Heater, 140,000 BTU, Power Direct Vent, 15 Yr Heat Exchanger/5 Parts Warranty
1262.001009.60
140 MBtu
ATO-110U
In Stock

AO Smith ATO-310U-N Tankless Natural Gas Water Heater, 190,000 BTU, Power Direct Vent, 15 Yr Heat Exchanger/5 Parts Warranty
1752.001401.60
190 MBtu
ATO-310U-N
In Stock

AO Smith ATO-510U Tankless Natural Gas Water Heater, 199,000 BTU, Power Direct Vent, 15 Yr Heat Exchanger/5 Parts Warranty
2156.001724.80
199 MBtu
ATO-510U
Qty:
AO Smith ACI

Gas, Water

Stainless Steel Heat Exchanger
Out of Stock
Retail : $5,660.00 $5,094.00

You Save (10%)

Qty:
Laars Mascot ® ST Series Water Heater

Natural Gas/Liquid Propane
Retail : $3,067.90 $2,147.53

You Save (30%)
Laars MSTWW199NA1XXR Mascot ST High Efficiency Residential 199,000 BTU Wall Hung Condensing Tankless Water Heater
3067.902147.53
199 MBtu
MSTWW199NA1XXR
Qty:
Laars Neotherm Series Commercial Boiler

Natural Gas

Commercial Water Heater

10 Year Warranty
Retail : $23,539.00 $16,477.30

You Save (30%)
Laars NTV-399FP Neotherm High Efficiency Commercial 399,000 BTU Natural Gas Modulating Condensing Boiler
23539.0016477.30
399 MBtu
NTV-399FP
Qty:

Now Shopping by

Water Heater Type for Top Filters Tankless Remove This Item

Clear All

Shopping Options

By using this site you agree to our © 2025 AF Supply Corp. All Rights Reserved.