How to Choose Best 40 Gallon Water Heater Of 2018 (Buyer’s Guide)

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Best 40 Gallon Water Heater
We have been working for many hours to make this buying guide. Our team thoroughly compared many 40 gallon water heater from the marketplace to find the best products. Review score, material, brand, weight, and many other specifications were taken into consideration. However, if you still think that there is a way to make our guide better — contact us and share your ideas.

Given the number of 40 gallon water heater brands nowadays, picking the best one is a very time-consuming task. Many companies regularly produce new 40 gallon water heater to compete for customers’ money. Fortunately, you can use the list of the top 40 gallon water heater to quickly choose the best product. There is also the extended top 30 list with more options.

Top 9 of 40 Gallon Water Heater of 2018

Rating Image Name and Features Details
5.0
Ecosmart Eco 11 Electric Tankless Water Heater 1. Ecosmart Eco 11 Electric Tankless Water Heater (Editor’s Choice)
Never run out of hot water with an ecosmart tankless water heater.
Read reviews
4.5
A.o. Smith Ens-40 Promax Short Electric Water Heater 2. A.o. Smith Ens-40 Promax Short Electric Water Heater
Dynaclean diffuser dip tube helps reduce lime and sediment buildup while maximizing hot water output.
Read reviews
4.3
Rheem Rtex-13 240v Heating Chamber Residential Tankless Water Heater 3. Rheem Rtex-13 240v Heating Chamber Residential Tankless Water Heater
Durable copper immersion two heating elements, field serviceable.
Read reviews
4.0
A.o. Smith Gcr-40 Promax Plus High Efficiency Gas Water Heater 4. A.o. Smith Gcr-40 Promax Plus High Efficiency Gas Water Heater
Self-powered electronic gas valve uses thermopile to generate power needed to operate the electronic gas control without requiring external power.
Read reviews
3.8
Reliance 6-40-eors100 40 Gallon Medium Electric Water Heater 5. Reliance 6-40-eors100 40 Gallon Medium Electric Water Heater
Pex dip tube, glass-lined tank with anode rod protects against corrosion.
Read reviews
3.5
A.o. Smith Gcrl-40 Promax Short Gas Water Heater 6. A.o. Smith Gcrl-40 Promax Short Gas Water Heater (Most Stylish)
Uses a thermopile to generate the power needed to operate the electronic gas control without requiring an external power source.
Read reviews
3.3
Tankless Gas Water Heater 7. Tankless Gas Water Heater
Power vented directly vertically (rooftop) or sideways (wall) via stainless steel cat iii flue 3.5″ diameter included (20″).
Read reviews
3.3
Flextrol Thermal Expansion Tanks 8. Flextrol Thermal Expansion Tanks (Best Transitional Design)
Prevent dangerous pressure build up & protect household appliances and fixtures.
Read reviews
3.0
A.o. Smith Guc-40 Promax Ultra-low Nox Gas Water Heater 9. A.o. Smith Guc-40 Promax Ultra-low Nox Gas Water Heater
Uses a thermopile to generate the power needed to operate the electronics.
Read reviews

 

 

 
№ 1. Ecosmart Eco 11 Electric Tankless Water Heater, 13kw At 240 Volts with Patented Self Modulating Technology
 

Design
5/5
 

Materials
5/5
 

Construction
5/5
 

Value
5/5
 
Overall Brand Model Dimensions Weight Details
5.0
EcoSmart ECO 11 6.5 x 13.5 x 10 inches 7.35 pounds
Check Price

Never run out of hot water with an ecosmart tankless water heater. Save up to 12 cubic feet of storage space. Digital temperature control in 1-degree increments gives users complete control of hot water. 11kw at 220 is equal to 13kw at 240 and activation flow is 0.3 gpm. The eco 11 requires a minimum 125 amp electrical panel for installation with 60 amp double pole breaker connected to set of 6 awg wire. Lifetime warranty or residential use. Save up to 60% on your water heating costs with the most advanced, self modulating technology available.

 

 
The Good
11kw at 220 is equal
Never run out
The eco 11 requires a minimum 125 amp electrical panel
Lifetime warranty or residential use
The Bad
You will not be able to find a single disadvantage.
 

 

 
 

Design
4/5
 

Materials
5/5
 

Construction
4/5
 

Value
5/5
 
Overall Brand Model Dimensions Weight Details
4.5
A. O. Smith ENS-40 22 x 22 x 50 inches 124 pounds
Check Price

Permaglas glass coating protects steel tank from corrosion and maximizes tank life. Coregard anode rode aluminum anode with stainless steel core protects tank against corrosion longer than ordinary steel anodes. Durable, tamper-resistant brass drain valve. Dynaclean diffuser dip tube helps reduce lime and sediment buildup while maximizing hot water output; made from long-lasting pex cross-linked polymer. Meets all current regulations set forth by the national appliance energy conservation act (naeca).

 

 
The Good
Meets all current regulations set forth by
Permaglas glass coating protects steel tank from corrosion
Dynaclean diffuser dip tube helps reduce lime
Coregard anode rode aluminum anode
The Bad
May be uncomfortable for tall people.
 

Are there any reasons to buy 40 gallon water heaterwith a lifetime warranty?

The recommended warranty period depends on how often you use your 40 gallon water heater, how expensive is it, what company made it, and many other factors. Manufacturers sell their most expensive products with a lifetime warranty, while the least expensive 40 gallon water heatermight be not guaranteed at all. We think that the best warranty period for a good 40 gallon water heater is five years.

 

 
 

Design
5/5
 

Materials
5/5
 

Construction
2/5
 

Value
5/5
 
Overall Brand Model Dimensions Weight Details
4.3
Rheem RTEX-13 4 x 9 x 13 inches 4 pounds
Check Price

External adjustable digital thermostatic control with led display (+/1 degree accuracy. Threaded for easy replacement, simple installation, digital temperature display. Simple installation 3 foot electric cable and 1/2 npt adapters included; side 1/2 inch compression water connections. External controls to adjust temperature in increments of 1 f. Water-saver shower head 1.5 gpm. Durable copper immersion two heating elements, field serviceable.

 

 
The Good
Simple installation 3 foot electric cable
Durable copper immersion two heating elements
99.8% energy efficient
External adjustable digital thermostatic control
The Bad
You will have to find a separate room to store it.
Has an outdated design.
 

How much money should I spend for a nice 40 gallon water heater?

Price is a very important factor of any 40 gallon water heater. Usually, the higher it costs the better its quality. However, we recommend you to consider all characteristics of a 40 gallon water heater. There are many models with an average price tag that can compete with the most expensive options.

 

 
 

Design
3/5
 

Materials
5/5
 

Construction
4/5
 

Value
4/5
 
Overall Brand Model Dimensions Weight Details
4.0
A. O. Smith GCR-40 22 x 22 x 58.5 inches 165 pounds
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Internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response. Meets all current regulations set forth by the national appliance energy conservation act (naeca). Dynaclean diffuser dip tube helps reduce lime and sediment buildup, maximizes hot water output; made from long-lasting pex cross-linked polymer. Blue diamond glass coating provides superior corrosion resistance to industry-standard glass lining. Self-powered electronic gas valve uses thermopile to generate power needed to operate the electronic gas control without requiring external power.

 

 
The Good
Internal microprocessor provides enhanced operating parameters
Self-powered electronic gas valve uses thermopile
Meets all current regulations set forth by
Dynaclean diffuser dip tube helps reduce lime
The Bad
Warranty period is hilariously low.
 

 

 
 

Design
5/5
 

Materials
3/5
 

Construction
5/5
 

Value
2/5
 
Overall Brand Model Dimensions Weight Details
3.8
Reliance 6-40-EORS100 1 x 23.1 x 53.5 inches 109 pounds
Check Price

Environmentally-friendly non-cfc foam insulation, water connection size: 3/4. 6-year limited tank & parts warranty.1-year labor warranty, copper sheathed heating elements dual 4500 watt. Factory-installed temperature & pressure (t&p) relief valve, max wattage: 6.000, voltage: 240. Pex dip tube, glass-lined tank with anode rod protects against corrosion. Factory-installed pex polymer lined heat trap nipples, family size: 3.

 

 
The Good
Factory-installed pex polymer lined heat trap nipples
Factory-installed temperature & pressure
6-year limited tank & parts warranty.1-year labor warranty
Environmentally-friendly non-cfc foam insulation
Pex dip tube
The Bad
You can find much cheaper products with the same functionality.
 

 

 
 

Design
2/5
 

Materials
2/5
 

Construction
5/5
 

Value
5/5
 
Overall Brand Model Dimensions Weight Details
3.5
A. O. Smith GCRL-40 22 x 22 x 47.8 inches 162 pounds
Check Price

Push-button piezo igniter makes lighting pilot fast and easy with one-hand push-button spark ignition. Dynaclean diffuser dip tube helps reduce lime and sediment buildup, maximizes hot water output; made from long-lasting pex cross-linked polymer. Internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response. Electronic gas control incorporates an led status indicator that monitors system operation and service diagnostics. Uses a thermopile to generate the power needed to operate the electronic gas control without requiring an external power source.

 

 
The Good
Push-button piezo igniter makes lighting pilot fast
Electronic gas control incorporates an led status indicator
Dynaclean diffuser dip tube helps reduce lime
Internal microprocessor provides enhanced operating parameters
Uses a thermopile
The Bad
Warranty period is hilariously low.
 

 

 
№ 7. Tankless Gas Water Heater Excel Pro Propane Lpg Gas 6.6 Gpm Whole House and for Hydronic Heating Compare to Rinnai, Rheem, Noritz, Bosch Free Flue Kit
 

Design
3/5
 

Materials
4/5
 

Construction
4/5
 

Value
2/5
 
Overall Brand Model Dimensions Weight Details
3.3
gasFlex 14.5 x 5.5 x 23 inches 69 pounds
Check Price

Power vented directly vertically (rooftop) or sideways (wall) via stainless steel cat iii flue 3.5″ diameter included (20″). Modulates heat output in response to the flow rate of water running through the unit. Certified for installation in manufactured (mobile) homes pure copper heat exchanger. Delivers 6.6 gpm of hot water with a 35 f instant temperature rise. Propane gas – up to 140.000 powerful btu’s of heating power.

 

 
The Good
Delivers 6.6 gpm
Propane gas
Power vented directly vertically
Modulates heat output in response
The Bad
It is rather costly.
 

 

 
№ 8. Flextrol Thermal Expansion Tanks, for Hot Water Heaters 2.1 Gallons, Carbon Steel Shell, Stainless Steel 3 4 Inch Mip Connection, Butyl Diaphragm, 150 Psi, 210 Degrees Fahrenheit, Almond Color
 

Design
2/5
 

Materials
4/5
 

Construction
3/5
 

Value
4/5
 
Overall Brand Model Dimensions Weight Details
3.3
Flextrol FTT5 13 x 9 x 9 inches 5.3 pounds
Check Price

Prevent dangerous pressure build up & protect household appliances and fixtures. Thermal expansion tanks are used to prevent plumbing system and/or water heater damage and unnecessary relief valve discharge caused by excessive pressure from thermal expansion. External baked epoxy-polyester coating provides a durable appliance finish; exclusive polypropylene liner eliminates internal corrosion. Mig welding eliminates interior rough spots and sharp edges; high grade steel construction; made in italy; all tanks are nsf61 certified. Protect safety valves from failing; save energy and water.

 

 
The Good
Mig welding eliminates interior rough spots
Protect safety valves from failing
Thermal expansion tanks are used
The Bad
Has an outdated design.
 

 

 
 

Design
2/5
 

Materials
5/5
 

Construction
3/5
 

Value
2/5
 
Overall Brand Model Dimensions Weight Details
3.0
A. O. Smith GUC-40 18 x 18 x 62 inches 140 pounds
Check Price

Equipped with a flame arrestor that provides smooth ignition and ensures that flammable vapors are safely combusted inside the sealed chamber. Uses a thermopile to generate the power needed to operate the electronics. Electronic gas control incorporates an led status indicator that monitors system operation and service diagnostics. Dynaclean ii diffuser dip tube helps reduce lime and sediment buildup, maximizes hot water output; made from long-lasting pex cross-linked polymer. Internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response.

 

 
The Good
Dynaclean ii diffuser dip tube helps reduce lime
Uses a thermopile
Electronic gas control incorporates an led status indicator
Internal microprocessor provides enhanced operating parameters
The Bad
Requires delicate care.
 

How long does the warranty lasts for a decent 40 gallon water heater?

You should buy 40 gallon water heaterfrom brands with customer-friendly warranty policy. Trustworthy 40 gallon water heater manufacturers offer two-year or even longer warranty period. You would not have any problems in case of any issues — simply take a broken product to the service center to get it replaced or fixed.

Is not buying 40 gallon water heateron the internet is dangerous?

Why there should be any reasons to worry? There are no risks in buying 40 gallon water heateron the internet, sine you can always get a refund. You can also check the reputation of a seller just to be sure that your 40 gallon water heater will be delivered without any problems.

Are there anything special that I should know before buying a 40 gallon water heater?

Marketplace provides a myriad of convenient features to help you compare and choose 40 gallon water heater. It also aggregates thousands of reviews from people all over the world. Always read them before choosing a 40 gallon water heater!

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