Latest Articles

Understanding the Waste Electrical and Electronic Equipment Directive

The Waste Electrical and Electronic (WEEE) Directive is a set of guidelines from the European community that dictates how electrical goods and...

on Oct 8, 2015

To See Your Projector Right, You Gotta Go Dark

Sure, most homeowners would love to have their very own home theatre – and for good reason. Imagine, no more long lines, no more sold out...

on Sep 30, 2015

Money Saving Remodeling Ideas for your Home

A renovation is a challenge for anyone who has moved into a new place especially when the budget is limited. Balancing the need to remodel your new...

on Sep 25, 2015

10 Benefits of Commercial Air Conditioning

Commercial air conditioning is incredibly important for any workspace. It gives you the power to control your workspace temperature and thus give...

on Sep 21, 2015

Ideal Carport Plan for Homeowners

The carport is always covered at the top and opened at the sides that offer shelter to vehicles, especially cars. However, you should not confuse...

on Sep 21, 2015

Tankless or Instantaneous Water Heaters

by 411HomeRepair on May 13, 2012

On demand water heaters regardless if they are tankless or instantaneous provide hot water as it is needed. They do not have energy losses like with storage water heaters.  With this you can save money from what's not lost in storaging pre-heated water. Here you'll find basic information about how they work, whether a demand water heater might be right for your home, and what criteria to use when selecting the right model.

Electric Demand Water Heater

Cold water flows though a pipe, then flows through and around several pipes through the heating elements, and the end result is hot water. Beneath the heating unit, a sink has two pipes,  one for the hot water and one for the cold water intake. Both pipes are required for the heating unit.  These are installed best in close proximity where the hot water use is most frequently used.  Eletrical considerations for 110 or 220 volts is also a requirement.

How Do On Demand Water Heaters Work

By defination, demand water heaters don't require storage tanks to heat water. Therefore, they avoid expense of the tranditional standby heating units. When a hot water tap is turned on, cold water travels through a pipe into the unit over the thermal heating elements. Depending on the model, an electric element or gas burner heats the water. The result of demand water heaters is to deliver a constant supply of hot water bypassing the need for storaging hot water. Hot water doesn't have to wait to refill a stoage heater and be heated.


One disadvange is a demand water heater's output limits the flow rate.  You can expect demand water heaters to provide run at a rate of 2–5 gallons (7.6–15.2 liters) per minute.

Even the largest model sometimes cannot supply enough hot water for multiple uses in large households at the same time like taking a shower and running the dishwasher at the same time. If this is a problem for your larger household, you can install additional demand water heaters connected in parallel for simultaneous demands or install separate demand water heaters for appliances.

Other applications for demand and simultaneous water heaters include the following:

  • Hot Tubs and Guest Bathrooms
  • Appliances (dishwashers or clothes washers)
  • Solar water heating system Rainy Day Support



Most Recent Articles

Random Articles

Safe Home Cabling

Accidentally tripping on a mains cable can be both painful and dangerous. Cables that run in the house aimlessly are a health hazard. They are also...

Electrical / Lighting

Working on Home Remodelling using Trellis

There are numerous ways to design home using various interior designing items. Most of this products are available in market to start with just buy...

Interior Design / Decor

Home Improvement Tips for the New Year

If people want to keep their New Year’s resolutions, it is important to make resolutions that are realistic. One of the most realistic resolutions...

General Household

Energy Tax Credit for Windows

You can claim your energy tax credit for home improvements by using online tax software. You will be sure to get the full tax credit for your home...

Windows / Siding

Feeling Foggy: Six Ways to Keep Your Bathroom Mirror Clear

There is probably nothing more frustrating than getting out of the shower to find that you can’t use the mirror as it has fogged up. Here are six...

Kitchen / Bathrooms


Contact Us | Submit Article | RSS | 411homerepair © 2015