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How to wire tankless electric Figure Volts Amps Watts for water heater
How to install point of use water heater Point of use water heater
Compare 16 electric and 3 gas water heater timers 9 ways to save with water heater Clean sediment out of water heater
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New water heater ideas

Heat pump water heater 

Objective to reduce energy consumption by using refrigeration cycle in reverse..
Back up elements

DIY install, not fully DIY repair, non generic parts, except generic back up elements.
***Service manuals available for AO Smith and State models
No service manual for Rheem and Steible
Why does a service manual matter? How can a local guy fix it if he can't get in touch with a professional? Who can fix it when your heater stops working on Saturday morning? Is he going to guess? Or will you have the service manual on your computer?
AO Smith Service manual

Research says:  Overall, heat pump ''succeeds in providing hot water for all scenarios tested and can maintain a high level of performance, even at low ambient temperatures.'
Yes it works as promised, but claim of savings is tempered by purchase price, noise, need 10x10 space for installation, yearly maintenance, limited life of product, cost of repairs and parts, and other factors.
Heat pump blows cold air into room, which lowers ambient room temperature and reduces amount of warm air needed for heat exchanger.
Works against HVAC ... using energy from HVAC to heat water.
Best suited for warm climate where ambient air temperature is warm.

All Costs are energy, so total energy-cost equals cost of water heater, plus installation, plus expected repairs-and-parts, plus disposal-recycling cost, divided by years of tank life. These numbers are added to monthly energy cost to measure true energy cost & efficiency of a water heater.
Government/industry efficiency numbers consider only energy cost per gallon of heated water.

Resources:
How to install meter on electric water heater
Read review
GE manuals
Gov laboratory evaluation of heat pumps 2011 (unknown who paid for research)
Heat pump water heater Heat pump integrated with refrigerator

Real science at work that you can apply.
Heat from refrigerator re-used in water heater
Modest home has 88 cent energy bill

Resources:
Water heater uses refrigerator heat
Low-energy home uses heat pump integrated with heat from kitchen refrigerator pg9
air generateAir Generate- Air Tap
Objective: Energy savings
Heat pump added to top of existing tank. 7000 BTUs consumes 2.05 KW for each hour of operation.
Geyser Heat Pump
Geyser Heat Pump
Promo blurb
Objective: Energy savings
6000 BTU consumes 1.75 KW for each hour of operation.
University of South Florida water heating system
Objective: Energy savings
"Adjusted cost of hot water = $85 per year"
CO2 heat pump water heaterCO2 Heat Pump Water Heater Development
Objective: Reduce energy and emissions; Replace refrigerants with CO2 
Read 1 2 3
Bond pipes together to prevent corrosion of tank
Add copper wire between hot and cold pipes/ prevent stray current corrosion

Applies to older homes with copper and galvanized pipe ,,,, not newer homes with plastic and pex pipes.

Do not ground outdoor equipment to water pipes. Must be grounded to conduit, and via copper wire connected to dedicated ground rod or back to ground busbar in main breaker panel.
Do not connect electric panel grounding to water pipes. in past years, this practice was approved, but no more. Always bond ground busbar to correct sized wire that is connected to ground rod.

Resource:
Why you need ground wire

Larger image with details

Heat traps

Make your own heat traps to stop upward flow of heat loss
Save energy year

To meet energy standards, all new water heaters come with factory-installed heat traps that can clog during installation and during plumbing repairs later.
The problem is new heaters have short nipples, and it's hard to remove the nipple, and replace with nipple that will not clog.
Remove metal top off heater and see if foam insulation can be cut back so wrench can be applied to the nipple.

Precaution: Disconnect supply tubes on water heater and flush after making plumbing repairs
Plumbing repairs can dislodge debris inside the line that will clog heat traps
City repairs on sewer lines, or water lines, or meter can cause movement of water lines, and release debris that can clog heat traps.

Resource:
How to remove short nipple

Heat trapFactory-installed heat trap inserts
These can be replaced using robust hose washer ... preferably the fiber-rubber type if still available. Do not use the cheap hose washer because they don't work for a water hose, so they will leak on a water heater for sure. Buy quality and buy extra because everything is on sale today.

Water heaters with insert type dip tube might have heat trap washer


Dip tube

Resource:
Read about dip tubes
Heat trap nipples Hot side and cold side heat trap nipples
Save $2 per year energy cost
Manufacturers add heat traps so they can claim greater efficiency
However these heat traps can clog, especially after pipe repairs upline from water heater
Water heater can make noise and whistling sounds.
Recommend removing heat traps, and installing pex-lined nipple
Buy:
Dielectric nipples at Amazon

Resources:
Low hot water pressure
Noisy water heater
How to remove short water heater nipple
Pex-lined nipples
Less corrosion
Prevent electrolytic deterioration when connecting copper and galvanized
Buy:
Dielectric nipples at Amazon

Resource:
How to remove short water heater nipple

Insert 5/8" carriage bolt to prevent nipple from collapsing

Resource:
How to replace short nipple
Drip pan
Drip pan saves damage
See drip pan installation
Drip pan

Buy:
Water heater drip pans at Amazon
watts automatic shut off valveAutomatically shuts off water in case of water leak
Set detector in water heater drain pan
Plug transformer into 120Volt outlet
Lead free brass

Buy:
Floodstop water heater shut-off at Amazon

Resources:
Onsite Pro FS1NPT manual
Watts automatic shut off valve sell sheet
Watts automatic shut off valve manual
Meter on water heater
The Kwh meter is din rail mounted inside enclosure.
Records billable power usage in Kwh. Multiply by rate you pay per Kwh to get monthly/ yearly cost of running electric water heater.

Buy
Bomain power meter
240 volt pass through Kwh  meter
2T2502GA beige plastic enclosure
2T2500GA grey plastic enclosure

Resource:
Enclosures
How to install electric meter on 240Volt water heater
CA3750 controls water heaterLarger image
Control water heater with z-wave

How to control water heater with zwave
10-3-wire
Wire color can be red-black or white-black or black-black etc
Wire color does not matter.
Add black tape near end of white wire when white wire carries voltage.

Buy:
GE z-wave contactor

Resources:
Figure volts amps and watts of water heater
Select correct wire size
How to check if electricity is OFF
See inside main breaker box
Control water heater with z-wave or wifi  switch
Resources:
How to control water heater with zwave switch
How to control water heater with zwave contactor


Wifi
Resource:
How to control water heater with wifi contactor
gas meter on gas water heaterInstall meter on Gas water heater
Record exact usage of BTU of gas appliances.
3/4" pipe thread connections. Use yellow teflon tape or gas-approved sealant.
No excess tape or sealant inside pipe. Use black pipe or yellow flex line. Keep pipes clean during assembly.
Install in vertical position with inlets pointing up as illustrated.
12.2" Tall x 8.5" Wide x 11.2" Deep
No power source required
Digital readout in cubic feet
Remote Readable option (pulse output) using EKM-25IDS

Buy:
EKM gas meter
Approved gas pipe sealant
Yellow gas line

EKM gas meter
Larger image
Gas water heater timerGas water heater timer
Or use daily or weekly plug-in timer to set schedule
Plug in timers
-or-
Integrate with home-automation module, zwave, wifi, insteon.

Gas water heater timer adjusts dial on gas control valve, rotating between ordinary thermostat setting and 'vacation' setting.
The water heater is never completely off, so there is no short-cycling issue when operation resumes, plus vacation mode at 50° prevents water heater from freezing.
No-tool installation. Works with older style mechanical thermostats, and newer Honeywell thermostat, fitting both propane and natural gas heaters.

Buy
Gas water heater timer at American Pacific
$5 coupon code GENO

Resource:
Gas water heater timer
Marathon water heater
Marathon electric


Objective: long life, damp environment installation
Often used as a solar collection tank, some models rated for 170°F heat

Non-corroding polybutene tank, oversized element ports for easy sediment removal
Fully DIY repair, DIY install, generic thermostats, non generic elements
Problem is non-generic elements, and myriad of part numbers making it difficult to identify and shop best price for DIY repair.

Resources:
Review marathon
Marathon elements
Marathon thermostats

Energy Smart
Energy smart electric water heater
Objective: Energy savings
4 operating modes to reduce consumption
Fully DIY repair, DIY install, generic elements, non-generic thermostats

Resources:
Review energy smart
Convert energy smart to regular water heater

Power vent, power direct vent water heater

Motor pushes combustion by-product out through a flue pipe and into atmosphere.
Unlike atmospheric vent heaters that utilize natural upward draft of air through flue.
Resource:
Troubleshoot power vent water heater
Icon gas valve
Electronic gas control valves
Many water heaters today come with an electronic gas control valve
Error codes help with diagnosis
When errors occur in the heating sequence, the circuit board begins to tally the number of occurrences. When number of errors exceed parameter, the status light begins to blink in patterned sequence, indicating most likely causes.
Resource:
Troubleshoot water heater gas valve

State point of use water heaterUnder counter/ point of use water heater
tankless under counterReliance water heaterCan save money by reducing amount of hot water drawn from main tank
Used to increase capacity of hot water supply
Used as replacement for larger tank
Used so warm water is available immediately
Electric tank models are Fully DIY repair, DIY install, generic parts
Tankless models: DIY install, not DIY repair, no generic parts

Resources:
How to install under counter
How to wire tankless electric water heater
Solar kitchenDIY solar
Photovoltaic water heater
Resources:
Low voltage PV photovoltaic heater
High voltage PV photovoltaic heater
Review Techluck

Passive DIY solar heater using old water heater or solar collector
Long list of DIY solar water heat ideas
Solar glycol
 Closed loop circulates solar-heated glycol through indirect heater.
Glycol is anti-freeze and will not freeze with winter temperatures
The glycol cannot be mixed with potable (drinkable) water supply.
The glycol heats exchange coil inside indirect heater, and transfers heat to water

Back up element ensures hot water is available on cloudy, snowy days etc.

FYI: the PV electric solar panel will harvest more energy from marginal sunny days than glycol solar systems, and will begin to pull energy from solar output earlier and later in the day.
Otherwise on sunny days, the glycol system heats hot water as expected

65-80-119 gallon tank stores solar heat
One back up 4500 Watt element, foam insulation, 150 psi working pressure

Ask questions before buying solar
Lochinvar solar storage tank
Manual
Parts sheet
Spec sheet
Indirect heater
Indirect heater receives hot water from another source, such as solar hot water system, wood-burning stove, or a boiler,
The hot water from boiler is circulated through the heat exchange coil, causing potable (drinkable) water inside the indirect heater to get hot

The indirect heater does not have it's own heating source, unless specified.
For example, indirect heaters used for solar water heaters (shown above), typically have electric heating element for backup.

Indirect heaters have separate inlet-outlet for incoming hot water from boiler or solar panels, and these connections let hot water circulate through the heat exchanger. The heat exchanger is a single-wall or double-wall tube that is sealed and will not allow water from boiler or glycol used for solar panels to mix with the potable (drinking) water.

More about indirect heater
Polaris cut away High efficiency condensing heater

Review high efficiency condensing heater

Mixing valvemixing valveMixing valve
Commonly used to increase capacity of tank or store very hot water
Useful for high volume home ... also useful for off grid home that makes batches of hot water then sips hot for several days
Buy from my affiliate links:
Mixing valve kit at Amazon
mixing valves

Resources:
Advantages disadvantages mixing valve
Identify and repair water heater valves
Larger image
Earthquake zones
Use earthquake straps to prevent water heater from falling over.
Earthquake straps help prevent gas leak and fire in event of earthquake.
Prevents damage to property and injury from falling tank.
Protect home and investment.
Local codes require straps/ restraints in some areas
Buy:
Earthquake straps at Amazon

Resources
Earthquake and other hazards information pdf
See illustration of installation
low nox burnerLow Nox water heater
built with special burner to help reduce or limit the amount of nitrous oxides (Nox) released during the combustion process.

Objective: Low nitrogen oxide emissions
75% less Nox than standard model while maintaining efficiency and water temps
intakeclogged sensor Hard-water/efficiency
Tankless water heater efficiency drops > parts fail in 2 years without water- softener. De-liming does not restore efficiency. Read pdf



Condensing water heater
New WH standards
Two water heaters

High-efficiency & innovative Gas


Ordinary gas water heater 69% efficiency.
Tankless 79%.
Electric 99%. 'High efficiency' gas 90- 96%.

High efficiency not same as energy savings.
Aircraft carrier may be efficient but small ship is cheaper.
Read more

AO Smith high efficiency Gas water heater
Objective: High-demand 
121 Gal per hour recovery <> compare with regular gas 41 Gal per hour recovery

Bradford ultra high efficiencyBradford White efficiency
Objective: Ultra-high efficiency, air quality, integration with technology and exterior heat sources
Digital control located at top
Rheem power ventRheem Power Vent electronic gas heater
Objective: PV electronic control
Adjust temperature remotely
Self cleaning
AO Smith Vertex "peak demand" Gas heater
Objective: High demand
Burner & blower at top deliver unlimited hot water
Diagnostic LCD
AO Smith "Next-hybrid"
Objective: efficiency & high demand
Uses secondary heat exchanger & buffer tank
Multiple modes
Bradford white high recoveryBradford White high recovery
Objective: high demand and conventional draft
76,000 BTU per hour so more hot water is available
AO Smith EffexAO Smith Effex
Objective: Powered Anode
40,000 BTU sealed system recycles hot combustion gas.
Resettable FVIR
Read power anode rods
American high efficiency gas
Objective: efficiency & easy installation
Pressurized combustion
24V Electronic control
Powered anode rod - Read
Bradford white low NOx Zenith copper-lined
Objective: anti-microbial & long tank life

99.99% pure copper
Self-cleaning
Lochinvar low nox water heaterSuperStor oil fired water heater
Objective: Low energy cost

Phoenix evolution
Phoenix evolution
Objective: Combine all home heating into one appliance
Hot water, hydro air
Hot water baseboard heat
Solar assisted
http://zenithwaterheater.com/copperlined.htm
http://www.htproducts.com/phoenixevolution.html
More Customer options
Immersion heater
Objective: now guests can stay in the barn
Put 120V electric heater in bucket of water > makes 150° hot water
hot water dispenserInsinkerator Hot Water Dispenser
Objective: save water, save energy
Point of use hot water
Kohler Sunbeam Franke KitchenAid Panasonic Others
Pot heaterPot heater
Objective: Fill pot and have hot water at any sink
12" tall heater heats plugs into 115V outlet
Dispenses 2-3 liters hot water into cup or sink
Use switch or timer
Wood burning water heater

Objective: Savings
OWB: outdoor wood-fired boiler

Check local air quality rules
NRG Biogeyser
Solar:


Solar water heat is efficient use of solar energy

Solar tanks are made for higher temps.

Regular water heater can be damaged by 180° F solar temps.
Tempering valve needed.
Check manual



Solar water heaterAO Smith Cirrex solar assisted electric heater
Objective: Solar heating
Energy star > 30% tax credit Claim: "70% water heating is free"
Solar water heatRheem Solar series products
Objective: Solar heating
Slim solar panels provide free and natural way to heat water
Electric back up
State "sandblaster" commercial self cleaning
Objective: Long-term value Less sediment means more energy efficiency
Gold elements = long life
Kenmore tabletop water heaterKenmore tabletop
Objective: utility /appearance
Easy access control > set temperature higher on wash day > 2" foam insulation.
Dual power option


Lochinvar solar storage tank
Objective: Store solar heat
Back up 4500 Watt element, foam insulation, 150 psi working pressure
Solar water heatBock solar tank
Objective: Store solar heat
Optional electric element back-up
Solar water heatTriangle tube indirect multi-energy tank
Objective: Integration with solar, geothermal
Heat exchange coil
2" foam insulation
Solar water heaters

Jose AlanoJosé Alano solar collector from water bottles
Objective: Recycling, innovation, solar heating

Brazilian from Brazil
Gull sun coilGull Sun Coil
Objective: Absorb solar heat from all directions
Locate 6' diameter collector in hard-to-fit areas
5 gal per minute flow rate




Timers and controls



Protect electronics from electrical surge


American Pacific timerAmerican Pacific Gas Water Heater Timer
Objective: Save energy
Do-it-yourself gas water heater timer
Icon gas valveBradford White ICON gas water heater timer
Objective: Save energy
Gas valve communicates with timer and other features.
Gas water heater timer
Compare 16 electric and 2 gas water heater timers

Objective: Save money
Do-it-yourself timers save $15-20 per month



Honeywell Gas Valve
Gas valve communicates with electronic control at top of heater
Read pdf

Intelli-Vent electronic gas valve
Self-diagnostic gas valve. Brand-specific gas valves control increasingly complicated water heaters.
See error codes/ set temp
Programmable water heater timer on wall
Do-it-yourself water heater timer made from off-the-shelf parts
Costs about $80



Optional ways to control water heater temperature
How to adjust temperature
Ordinary timer controls temperature
Hybernator
Aqua Smart
Mixing valve
Whirlpool Energy Smart
Honeywell-Aube CT241
Off-peak water heater ideas

Tweaks and choices





Buy:
Motorized shut off valve
Leak detection and inlet water shut off
Off peak thermostat wiringOff-peak water heater
Do-it-yourself
Wire water heater so one element is turned off during peak electric prices


9+ ways to save with water heater
Do-it-yourself
Simple efficiency steps with your gas and electric water heater
Staging tank
Add tempering tank
Do-it-yourself
Pre-heat incoming cold water
with tank located in naturally warm area


Objective: Warn of anode rod depletion before tank rusts and ruptures, plus leak detection
Anode rod options
Defender FVIR heaters
Objective: Advanced flammable vapor protection
Read forum discussion

How to install gas water heater

Save money by knowing how to install and maintain water heater
Power anode rod
Objective: Long life for metal tank.
Anode rod options



Clean sediment from tank
Objective: Maintain efficiency
Anode rods
Objective: Lengthen life of water heater tank
Do it yourself water heater repairs and information
Objective: Save money
Troubleshoot electric water heater:
Objective: Save money
element thread to pipe threadNPT - NPSH thread
Use element port to connect solar collector.
NPSH thread to NPT.
National fire
Avoid tankless hype

Water heater parts
Larger image
Troubleshoot Rheem tankless
Read side-by-side test results
Read hidden cost of tankless


Water heater manufacturers, brands, sellers, resources/ 2020

Find age of your water heater
New water heater ideas & sellers
American water heater
American Standard
AO Smith water heaters
Amtrol indirect-boiler
Andrews UK
Apollo Water heater
AquaMax systems
AquaSense
Aquatherm combo
Atwood mobile products
Bock water heaters
Bradford White water heaters
Buderus solar tanks
Chromagen
Craftmaster water heaters
Dana/AE Anderson
Dux hot water systems
Everhot water heaters
Everlast (HTP) stainless steel heater
GE/ Rheem water heaters
Giant Factories
GSW Water heating
Hamilton storage
Hatco booster heater
HTP water heating
Hubbell water heaters
ISE hot water dispenser
John Wood
Kenmore/Sears water heater*
Laars/Bradford White
Lochinvar water heaters

New water heater ideas & sellers (cont)

Marathon/ Rheem
Maytag/
Nibe water heaters
Phoenix (HTP)
Quik water heater
Reco heaters
Reliance water heaters
Rheem water heating
Richmond/ Rheem
Ruud water heaters
Scout gas heaters/ State
State water heaters
Stiebel-Eltron-USA
Suburban RV heaters

Techtanium Indirect tanks**
Triangle Tube Indirect

US Boilers
Vanguard Water Heaters
Vaughn manufacturing

Vulcan
Weil-McLain water heaters
Whirlpool water heaters
Wolf solar tanks
Zenith water heaters




Appliance magazine :

620,000 - 650,000 water heaters are shipped each month in US read

Water heater shipments increased in April read


-Water heater self-help forums 1 2 3 4



Water heater reference chart
-Water heater reference chart







** Indirect water heaters receive heat from external source including boiler, solar collector, wood/coal burning, and geothermal




Water heater market profile
Water heater market profile 2009- pdf
3.8 Mb file


New water heater ideas



List of company identifications- pdf
228 Kb

List of Industrial manufacturers:
Elect-mech.com

More facts-n-figures


Carbon footprint
Battelle Report- pdf
7.8 Mb file

Tankless gas, storage gas, storage electric compared for:
> Carbon footprint
> Efficiencies
> Life-span with and without water softener


Carbon footprint
PG&E- pdf
21 Kb file
Carbon footprint 
Troubleshoot Gas valves with manuals Icon gas valve

How to replace elements


Replace thermostats
How to wire tankless electric


Install point of use water heater
Titan tankless
Anode rods anode rods
Recirculation system Point of use water heater
Type 1 and type 2 surge protection surge protection
Gas and electric water heaters Buy
Industrial electric

Industrial supplies

Tools and home improvement

Lab and scientific
Buy Tools
DEWALT
Black and Decker
Stanley
SKIL
Makita
Porter-Cable
Bosch

Irwin Hand tools
Klein hand tools
Fluke electrical testing
Dremel hobby tools

Campbell Hausfeld air powered
Tekton automotive
Powerbuilt automotive
Saws and saw blades
Resource:
Compare box timers
DPDT timers
Intermatic
Control water heater w/ Z-wave
Intermatic control centers Resource:
Control centers:
+ manuals and parts


All control centers and parts

Including Z-wave
programmable timer Resource:
Compare programmable timers
Compare countdown timers
Delay timers
Modules
Din rail
Twin
Woods
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