How can it be dangerous to feed a water heater from two separate panels?

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To those comparing it to drunk driving: that's crap. Yes, many have driven while intoxicated without any problems. No, this does not mean drunk driving is fine. However, it is a false analogy. No people have drowned because of having eaten just before having a swim. None. At all. While plenty have driven when intoxicated without encountering any problems, many have. They have had problems with severe consequences.

But no drowning ever has ever been attributed to having eaten just before. Also, most doctors will agree that there's nothing to worry about. Who came up with it, then?

A myth can easily be identified by the numbers of variations. What is it that makes you drown? It depends on who

you ask. Some will say cramps, while others will mention blood pressure or body temperature. Some in the comments mentioned vomiting underwater (which would still mean water in the lungs, by the...

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How-To Videos

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By: Danny Lipford

Draining your water heater once a year removes sediment from the tank that can cause it to work harder and cost more to use.

Begin by turning off the power or gas to the water heater. Next, turn the cold water supply valve off that allows water to flow into the heater. Hook a garden hose to the drain valve at the bottom of the tank and run it outside on the ground. Open the drain valve where the hose is attached. Open the pressure relief valve on top of the tank by pulling up on it. Allow the water in the tank to drain out. When the tank is empty, open the cold water valve for a few minutes to flush out the last remaining sediment. Close the drain valve and pressure relief valve and allow the tank to fill back up. Relight the pilot to the heater if gas, and turn it on. If electric, flip the breaker to restore power to the water heater.

For further information, see our video on Water Heater...

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Is your water heater leaking?

The first sign of your water heater going bad is when it starts to leak water, usually from the bottom of the unit. The leak usually starts as a pinhole and gets worse over time. This is just normal wear and tear, a common problem for water heaters that are anywhere from 10 to 15 years old.

The easiest way to tell if your water heater is leaking is that you will probably start to see some rust marks or water stains coming down from the unit.

Now it may be that you simply have a leaky hose. If so, then you will just need to replace the hose itself.

Is your water heater not heating?

If the unit is acting up and not heating right, then there is either a problem with one of the breakers, one of the heating elements, or one of the thermometers that are behind the unit's panel. Those are the main parts that are inside, and it is common that they fail every once in awhile. You'll find solutions below.

Where and what...

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If you are a typical homeowner, your second-largest energy expense is heating water, according to the United States Department of Energy. Just as you can utilize the sun to supplement your supply of electrical power -- your largest energy expense -- you can also use it to supplement your hot water. The set-up isn't expensive, and solar hot water panels are virtually maintenance-free, but your configuration has to fulfill certain conditions to be effective.

Solar Water Heating Basics

A solar water heating system has two necessary components: a collector to heat water and a tank to store it. The collector must be in a sunny location and ideally not too far from the tank, which should be well insulated. Besides that, the system should include a method of circulation so that water in the tank stays hot. Various types of solar panels are available for use as collectors, and installers typically deploy them on the roof, where they receive the most sunlight. Storage tanks...

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by Chris Woodford. Last updated: May 23, 2017.

Next time you get a really big electricity or gas bill, your thoughts may turn to solar panels. Wouldn't it be good if you could catch all the power you need from the Sun? Millions of people already do get their energy this way, though mostly in the form of heat rather than electricity. Solar electric panels (also called solar cells or photovoltaic cells) that convert sunlight to electricity are still not widely used; solar thermal panels, which use sunlight to produce hot water, are much more common. Even in relatively cold, northern climates, solar hot-water systems can chop significant amounts off your fuel bills. Typical systems generate anything from 10–90 percent of your hot water and pay for themselves in about 10–15 years (even sooner if you're using them for something like a swimming pool). Let's take a closer look at how they work!

Photo: Making hot water for free (well, once you've paid for the...

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A feed water heater is a device used to gradually heat water that is being delivered to a steam boiler. The main reason why feed water heaters are used is because the water needs to be heated gradually until it reaches its boiling point, also known as the saturation temperature. If water is heated too fast or too violently, the boiler metal is damaged because of thermal shock, which occurs when the rapid increase in temperature creates cracks in the metal. A feed water heater also can increase the overall efficiency of the steam cycle, because the primary heat source does not need to be employed. Instead, feed water usually is heated by alternative heat sources naturally found within the steam cycle.

The heat used in a feed water heater can be derived from multiple places within the steam cycle. This can vary depending upon the specific cycle or steam generator, but exhausted steam from a steam turbine typically is used. In most stationary turbine power plants, there are two...

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A water heater heats water, so occupants can wash in warm or hot water. In some cases the heated water is used to heat the home with water or steam radiators. How water piping can also be wisely placed to provide other benefits, like heating a bathroom's tile floor.



If a hot water heater is not used for several weeks, hydrogen can build up in the tank. This can be dangerous, if an electrical appliance is the first device to use the water heater. To avoid a possible explosion, if you haven't used the hot water heater for two or more weeks, run the hot water from the tap for a few minutes before using an appliance, like a clothes washer or dishwasher.

Energy usage and efficiencyEdit

New, higher efficiency furnaces and water heaters create a higher acidic exhaust, which can corrode older chimneys, especially a brick one without a liner. So, if you are replacing an older system, you may need a new chimney vent or liner...

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I absolutely love falling asleep in the bath. When I was at university I used to come back from weights training at about 5pm after a long day starting with a rowing outing at 6.15am and lots of lectures, and run a hot hot bath, slide in and drift off for twenty minutes...bliss. I would imagine if you are prone to fall asleep because you are very drunk, that might be an issue, or if you had some very high cardiac risk, but otherwise I shouldn't think it's dangerous at all.

OK, having looked at mortality statistics for the UK (actually poss England and Wales?) for a random year (2005), 30 people died of accidental submersion/drowning in a bathtub. None of those was aged between 15 and 44 (can't see the age groups older than that). I still think it's pretty safe...

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Well, let's see; it's really about calories, eh? Since; 1 Calorie = the amount of energy required to increase the temperature of 1 litre of water by 1 degree c; hence, you'll need to figure out how many litre's are in your tank, then determine the current AND desired temperatures. Then, multiply (total liters)x(desired temp - current temp) = number of total calories of energy that will need to be generated. Then rig up a treadmill to the water heater (to serve as a 'generator') and get to steppin..once you've 'generated' enough calories; not only will you have benefited from an excellent work-out, but you will have nice hot water for the shower that you will no doubt be in need...

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This answer describes a fictional installation, and is NOT meant to be a solution to a problem. This setup should NEVER be implemented in the field, as it is unsafe, and violates countless codes. These codes are intentionally ignored in this answer, in an attempt to keep the answer short and to the point. There's likely no way to make this setup safe, and this answer makes no attempt to do so (and neither should you). There are obviously other flaws with a circuit like this, though this answer only seeks to explain one particular flaw. Please stay safe, and don't ever try this at home.

Assuming that both panels are fed by the same 120/240V single split-phase distribution transformer (which may be a terrible assumption). The wiring would look something like this.

Click for larger view

That's two panels, wired to a single transformer. I've eliminated the grounding conductors, to keep the diagrams cleaner. I've also added a 120 volt load to each panel, to...

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You need to consider the capacity of your mains from the service drop splice to your meter box, and to your service panel.

If you are currently running #000 copper for your mains and #0 copper for neutral, you could upgrade to 200 amp service. If however, your mains wire gauge is smaller, you are limited by this to 125 amps for #00 copper for the mains.

The simplest (and safest) way to set up your service panel in the garage is to set up a sub panel from your main panel. If you insist on running two main panels from your meter box, then the sum of the main breakers' capacities must be less than the current rating for your incoming mains wiring.

Thus, if you currently have 150 amp service, you could only have 100 amp service in your home and 50 amp service in your garage (or any combination thereof that totals 150 amps).

I'd recommend upgrading to 200 amp service, and running a 100 or 125 amp subpanel to your garage. That way, if the house was lightly loaded,...

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If the sub panels are fed from the main service panel then you need to do nothing except, mechanically or with a transfer switch, protect from back feeding the main incoming service and generator.

You see electricty does not know any certain direction. You could use one of the sub panels to back feed all the panels as an example.
Then you can pick and choose existing breakers to use when the power goes out.

The 40 amp breaker you mention will distribute power to all of panels.

However, You must provide protection for the generator and the incoming power grid. They make some lockout devises that will not let you turn on the (main service breaker) if the (generator breaker) is on. And visa versa. Transfer switchs while very expensive are the best choice, but are not always needed.

Take the time to mark your panels breakers as to what they serve. Saves alot of time during a black out.

If you have any doubt about this. Please call a qualified...

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I am installing both Enerworks solar thermal (hot water panels) and a Bosch GSHP (water to air) with desuperheater and am looking for advice on the best way to connect the two systems together to pre-heat/heat my domestic hot water.

Vendors of GSHP systems know how to plumb their de-superheater output to pre-heat DHW, as do the solar hot water panel vendors, but it seems to be an opinion rich environment when it comes to integrating both systems.

The house is in Northern New Brunswick, Canada. My reasoning for installing both systems is that the de-superheater will produce more preheat potential during the winter, and the solar system will be more productive in the summer.

Can anyone recommend the best way to connect these...

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If you want to save energy, there are lots of exciting appliances and building materials that you might want to specify for your home: triple-glazed windows, an efficient refrigerator, and compact fluorescent or LEDLight-emitting diode. Illumination technology that produces light by running electrical current through a semiconductor diode. LED lamps are much longer lasting and much more energy efficient than incandescent lamps; unlike fluorescent lamps, LED lamps do not contain mercury and can be readily dimmed. lighting, for example.

When it comes to choosing a water heater, though, clarity evaporates. Simple, affordable water heaters aren’t very efficient, and efficient equipment is complicated and costly. So how do you go about choosing a water heater?

Emergency decisions

Most homeowners ignore their water heaters. About once every ten years, the average homeowner goes down to the basement or out to the garage and notices that the water heater is sitting in...

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As the price of photovoltaic modules (solar modules, solar panels) continues to drop there are many discussions about using solar electric modules to heat water. No more leaks, messy and complicated plumbing, heat exchangers, controllers to fail, pumps to maintain and fluids to freeze.

Solar hot water has been plagued with leaks, freezing (or poisonous antifreeze), air in the pipes, controller and pump failures just to mention a few of the difficulties we have had over the past few decades.

However it was the only way to make hot water with the sun. Just a decade ago solar electric modules cost over $10 per watt. Solar thermal was much less expensive per kW or BTU.

Our goal is not to bash solar thermal hot water as it serves a purpose, has performed well for many including our own homestead, and produces more hot water per square meter (or square foot) than photovoltaic ever will.

We currently have a 20 tube evacuated solar hot water heater in...

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ELECTRIC WATER HEATER REPAIR GUIDE - home - CONTENTS: Electric Water heaters: how to inspect, test, adjust, repair a water heater - How to test and repair an electric hot water heater. No Hot water? how fid the water heater or how to get more hot water flow, quantity, performance from your water heater POST a QUESTION or READ FAQs about how to diagnose and repair electric hot water heaters REFERENCES

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Electric water heater diagnosis & repair procedures:

Here we explain how to test and repair an electric hot water heater that is not heating at all or is not producing enough hot water. We start with simple basic checks and then move to testing and replacing bad controls or bad water heater elements.

This series of articles describes how to inspect, operate, diagnose, and repair electric hot water heaters. The articles at...

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