The 10 Best On Demand Natural Gas Whole House Hot Water Heater

This compact , yet powerful unit – with gas inputs up to 140,000 BTU per hour – can meet all the hot-water needs of a small to medium American home or apartment. Designed to virtually do anything a 40-gallon tank-type water heater can do and much more The Wall mounted Excel Pro is design to work with hydronic baseboard or radiant floor heating applications, as well as provide domestic hot water to plumbing fixtures and appliances. LCD Display Control: Just set the desired water temperature The Excel Pro has an energy factor of 0.84-0.85. Excel Pro: Modulating Technology Tankless water heaters can be further divided into two categories according to their heating capability: “full on/full off” versus “modulating”. Full on/full off units do not have a variable power output level; the unit is either fully on or completely off. This can cause an annoying and possibly hazardous variation of hot water temperature, as the flow of water through the heater varies. Modulated tankless water heaters change their heat output in response to the flow rate of water running through the unit. The Excel Pro comes with a display panel where you can set the output temperature and regardless of water flow the unit modulates the fire power. Pure Copper Heat Exchanger * As used by other top of the line tankless gas water heater manufacturers like Rinnai, Takagi, Rheem and Noritz. Features & Benefits Super compact 14.5″ x 23″ x 5.5″ size 84%+ thermal efficiency 140,000 BTU maximum input 6.6 gallons/ minute capacity at 35F degree rise Minimum activation flow rate of 0.5 gpm Electronic ignition. Has a Power vented fan that Vents directly vertically or horizontally with 3” stainless steel flue 3′ long flue and elbow included. Can be used in recirculation and space heating application . Delivers 6.6 gpm of hot water with a 35°F Instant Temperature Rise (Equivalent to 5.5gpm with a 45F temp Rise). European Model Digital Display is in Celsius.

Saves energy, saves water! Marey Power Gas 10L Tankless Water Heater requires NO electricity to deliver endless hot water! It’s simple to install and requires no electricity to operate. Energy-saving design heats up in seconds and uses gas only while water is flowing. Available in LP and natural gas models. Adjustable gas and water controls; Electric pulse ignition powered by 2 D-cell batteries (not included); Activates by water flow when faucet is turned on; Rust-proof… no water loss due to leaks; Anti-combustion and gas pressure safety protection; Works easily with low levels of water pressure; Applicable water pressure: 3.6 – 145.0 psi; Hot water output per minute: 3.1 gallons; Energy efficiency: 54% – 87%; Exhaust discharge mode: Flue duct type; Gas Types: Liquid Propane Gas, Natural Gas; Dimensions: Approx. 24″ x 14″ x 7″; Weight: Approx. 21 lbs.; Mfg. Number: GA10LP (Liquid Propane Gas), GA10NG (Natural Gas); Marey Gas 10L Tankless Water Heater

Product Description

Aquapure by cuno hot water system protector to reduce scale build up in pipes and extend life of water heater. Installs on cold water side of hot water system to inhibit scaling and corrosion. Whole house scale inhibition water treatment system. Ap430-10 features: -product type: whole house -filter component: filtration system -filter change indicator: no. Dimensions: -overall HEIGHT – top to bottom:13 -overall WIDTH – side to side:2 -overall depth – front to back:2 -overall product WEIGHT:2.25 . Do not install in direct sunlight or outdoors

From the Manufacturer

Aquapure by Cuno hot water system protector to reduce scale build up in pipes and extend life of water heater. Installs on cold water side of hot water system to inhibit scaling and corrosion.

Product Description

The NORITZ NRC66DV is a fully condensing tankless water heater with an advanced heat exchanger design and built-in controller. With flow rates up to 6.5 gallons per minute the NRC66DV delivers the highest flow rates in its category and can be vented using 3″ Schedule 40/80 PVC, PP or CPVC.  Various adapters and terminations are available to allow for a wide array of venting options.  This unit ships complete with a 6′ power cord.  IK-WV-200-1-XX-LF valve kit (required for installation) is sold separately. Common companion items include rain cap (PRC-1), atmospheric conversion kit (SVCK-3) and horizontal termination/intake PVT-HL.

From the Manufacturer

Indoor tankless water heater up to 6.5 gallons per minute. Noritz has been an innovator in the water heating industry for over 60 years. We introduced the first modern, electronically controlled tankless water heater in 1981 and we remain the leader in energy savings and superior hot water delivery today. Our goal is to empower you with the highest quality products available at superior value.

Product Description

With gas inputs of 199,000 BTU, the T-H3 can produce enough hot water for four bathrooms in warmer climates or three baths in colder climates.

From the Manufacturer

With gas inputs of 199,000 BTU, the T-H3 can produce enough hot water for four bathrooms in warmer climates or three baths in colder climates.

1.The Camplux CA318 is perfect for vacation cabins, cottages, and smaller homes.
2.This model has a sleek, black tempered glass casing with automatic temperature controls and a touch screen with an LED digital display that shows the output temperature reading.
3.It comes with a horizontal stainless steel vent pipe, ready to install and with its 120-volt power cord powering the internal exhaust fan and digital display.
4. For indoor installation with safe, efficient power ventilation. Stainless vent pipe included.
5 It delivers up to 3.18 Gallons Per Minute of hot water ranging from 95-149 degrees Fahrenheit(35-65 degress Celsius).
6.The ideal low water pressure operating range for the Camplux CA318 is 3.6～145.0 PSI, work easily with great performance.
7.The operating propane gas pressure is 0.4PSI with maximum power output 82,000btu/hour.
8. It only generates about 42 watts and 0.35 amps during operation, making it an ideal energy efficient appliance.
9. Flame failure device, anti-freezing protection and oxygen depletion safety shutoff protection.
10.The gas water heater can\’t be used for drinking water.

Easy to Use
Get the instant tankless gas hot water system that\’s easy to set up and use!
1. Install the tankless gas water heater on the wall.
2. Install the stainless steel vent pipe.
3. Connect shower hose and shower head to the hot water outlet.
4. Connect water hose to the water inlet.
5. Connect gas pipe to the gas inlet.
6. Plug in the power cord.
7. Turn on water tap and enjoy instant hot water!.

What\’s in the Box
1 x Camplux hot water system
1 x Gas inlet connectors 1/2″ BSP Female x 5/8″ UNF inverted flare male
1 x stainless steel vent pipe
1 x accessories package（included water tape & fixing screws ）
1 x instruction manual

Inquiry & aftersales service: [email protected] Service hotline: (1)844-538-7475

Product Description

Features ENERGY STAR Qualified Energy Factor of .82 for Natural Gas and Propane Certified for Installation in Manufactured (Mobile) Homes Leak detection shuts off water to unit to limit property damage Enhanced scale detection lessens possibility of serious, long-term damage to unit Temperature lock prevents accidental or unauthorized changes to water temperature Complies with South Coast Air Quality Management District 14 ng/J or 20 ppm NOx emission levels Rinnai Value Series Tankless Water Heater Product Warranty Dimensions Width: 14 Inches Height: 23 Inches Depth: 9 Inches Weight 45.6 Pounds Ignition Direct Electronic Hot Water Capacity 0.26 to 6.6 GPM Minimum Activation Rate 0.4 GPM Minimum/Maximum Gas Rate (Input BTUs ) 10,300 150,000 Energy Factor 0.82 for Natural Gas and Propane Energy Star Yes Approved Gas Types Natural Gas or Propane Temperature Settings 98F – 140F with MC-91-2US 98F – 160F with MCC-91-2US Type of Controller MC-91-2US (included) MCC-91-2US (optional for Hydronic Applications) MC-100V-1US Deluxe Controller (optional) BC-100V-1US Bathroom Controller (optional) Ultra Lox NOx Yes Electrical AC 120 Volts, 60 Hz Electrical Consumption Normal: 76 Watts Standby: 2 Watts Anti-Frost Protection: 120 Watts Service Connections Gas Supply: 3/4 Inch MNPT Cold Water Inlet: 3/4 Inch MNPT Hot Water Outlet: 3/4 Inch MNPT. Turn off gas supply and 120 V power supply

From the Manufacturer

Features ENERGY STAR Qualified Energy Factor of .82 for Natural Gas and Propane Certified for Installation in Manufactured (Mobile) Homes Leak detection shuts off water to unit to limit property damage Enhanced scale detection lessens possibility of serious, long-term damage to unit Temperature lock prevents accidental or unauthorized changes to water temperature Complies with South Coast Air Quality Management District 14 ng/J or 20 ppm NOx emission levels Rinnai Value Series Tankless Water Heater Product Warranty Dimensions Width: 14 Inches Height: 23 Inches Depth: 9 Inches Weight 45.6 Pounds Ignition Direct Electronic Hot Water Capacity 0.26 to 6.6 GPM Minimum Activation Rate 0.4 GPM Minimum/Maximum Gas Rate (Input BTUs ) 10,300 150,000 Energy Factor 0.82 for Natural Gas and Propane Energy Star Yes Approved Gas Types Natural Gas or Propane Temperature Settings 98F – 140F with MC-91-2US 98F – 160F with MCC-91-2US Type of Controller MC-91-2US (included) MCC-91-2US (optional for Hydronic Applications) MC-100V-1US Deluxe Controller (optional) BC-100V-1US Bathroom Controller (optional) Ultra Lox NOx Yes Electrical AC 120 Volts, 60 Hz Electrical Consumption Normal: 76 Watts Standby: 2 Watts Anti-Frost Protection: 120 Watts Service Connections Gas Supply: 3/4 Inch MNPT Cold Water Inlet: 3/4 Inch MNPT Hot Water Outlet: 3/4 Inch MNPT

Rheem RTG is a series of mid-efficiency condensing tank less gas water heaters designed for continuous hot water. Industry leading low flow activation with a minimum flow rate of . 26GPM and minimum activation flow rate of . 40GPM ensures hot water is received even in low demand situations. Ultra Low NOx burner meets SCAQMD rule requirements of safety with low emissions. While our exclusive Guardian Overheat Film Wrap prevents our units from reaching the dangerous temperatures others can. Add in our maintenance notification settings, self-diagnostic system and Eco Net enabled mobile app feature (additional kit available), buying the Rheem RTG tank less water heater makes perfect sense. Included are a digital remote control and 10ft. of thermostat wire. As this unit is for use outdoors no venting is required. Best if used with up to 3 bathrooms; . 82UEF (. 82EF Canada) efficiency.

Product Description

This Smart Technology electric tankless water heater is configured as a “whole home” model for climates where incoming water temperature is 67°F and above. This model is well suited for heating up to 2-Gallon per minute, which is the equivalent of one shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 67°F and an output setting of 105°F. Digital Temperature Control allows you to set your temperature in increments of 1 Degree. This model can also be used in colder climates as a Point of Use for a sink or other low flow application. All tankless water heaters are sized based on flow rate and temperature rise, and there is a direct relationship between the two. So if used in a cold area requiring a high temperature rise, it will be more limited in the amount of fixtures (gallons per minute) it can heat at one time compared to a warmer climate. When sized properly this water heater will provide endless hot water and only consume the energy needed, giving the user complete control. Prior to purchase and installation please verify this model is the right size for the expected demand and electrical requirements. The ECO 11 requires a minimum 125 amp electrical panel for installation with (1) 60 amp double pole breaker connected to (1) set of #6 awg wire. Plumbing connections are 1/2″ compression fitting with the option of 1/2″ NPT adapter included. For additional assistance please feel free to contact our support center at 877-474-6473.

NOTE : 11Kw at 220 is equal to 13kw at 240.

From the Manufacturer

This Smart Technology electric tankless water heater is configured for climates where incoming water temperature is 67 Degree F and above. This model is well suited for heating up to 2-Gallon per minute, which is the equivalent of one shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 67 Degree F. Digital Temperature Control allows you to set your temperature in increments of 1 Degree. This model can also be used in colder climates as a Point of Use for a sink or other low flow application. Prior to purchase and installation please verify this model is the rights size for your hot water needs and electrical requirements.

Conclusion

By our suggestions above, we hope that you can found on demand natural gas whole house hot water heater for you.Please don’t forget to share your experience by comment in this post. Thank you!