Solar Direct is dedicated to increasing our customer's awareness of
sustainable and renewable technology by providing an educational, yet highly engaging internet venue,
where they can discover how green alternatives can impact not only their lives, but the world future
generations will inherit! Click here first to
begin your sustainable living learning adventure! Learn the step-by-step details of how and why sustainable
and renewable technology works, and the science behind the functioning of each alternative energy process. Solar Direct offers unsurpassed, highly-personalized
product selection assistance, with experienced professionals providing toll free support -
creating a truly inspired purchasing experience for our customers. Click here next to start
the selection process, then use online tools to decide your proper type of technology and its matching product.
Product Selection Assistants are standing by to help you with toll free support. Solar Direct hosts the Energy
SuperMarket website, the Internet's top-ranked shopping destination for renewable energy technology. Enjoy
a secure shopping for all your alternative energy needs. Solar Direct offers thousands of green, sustainable
and renewable products, combined with toll free Product Selection Assistants dedicated to providing a quality
purchasing experience for all consumers. Click here
last to finish your alternative energy adventure! The Energy SuperMarket website provides the
most advanced, real world authoritative, user-friendly shopping destination for renewable energy
technology today.

Instant Hot Water

Metlund D'MAND System


The Washington Post, November 9th 2006
by Jeanne Huber | Special to the Washington Post

Washington Post Article

Circulation Solutions for Those in Hot-Water-Hurry

Q: Every morning, I get frustrated at how long it takes for hot water to arrive at my bathroom sink, is it worth installing an instant water heater in the cabinet underneath?

A: If you need hot water only at the sink, a small instant water heater might be a solution, but you’ll probably need a 220 volt circuit or a gas line, so the fix could wind up being quite expensive. Some small instant water heaters do run on a typical 120 volt household circuit, but they can’t raise the temperature enough to make the water very hot in the winter, and they deliver only half a gallon per minute. Most people want the flow to be twice that. Plus, in most houses, an under-sink water heater doesn’t address the other half of the problem the wait for hot water in the shower.

There is a way to get hot water more quickly at both the sink and the shower, however, assuming the pipe run between them is short, as it is in most houses. Install an on-demand re-circulating pump, sold under several brand names that all use the word “D’Mand” in the product name.

Using the fittings that come in the package, you connect the pump between the hot and cold pipes under the sink. When you want hot water, you press a button, and the device shoots the once-warm water in the hot-water pipe in the cold water line. It’s like opening the tap and waiting for hot water, except that instead of sending the water down the drain, the pump pushes the water backwards in the house’s piping loop. In effect, the once-warm water becomes the supply source for the water heater.

The pump operates at full throttle, so hot water arrives much more quickly than it does when a low-flow faucet regulates the water’s speed. Because water isn’t being wasted, you can use the minute or so of delay to do something else, such as picking out a fresh towel for your shower. When hot water arrives, the pump shuts off. You open the tap, and hot water flows instantly.

It’s important to get an on demand re-circulating pump, not one that runs continuously or on a timer, because the always-on types waste energy. One on-demand model is the Metlund D’Mand S-50, suitable for homes where the water heater is within 50 feet. It costs about $240 at and comes with all necessary fittings for copper pipes.

You’ll need a few extra parts if your house has plastic or galvanized piping. You’ll also need a standard 120-volt outlet. If that doesn’t already exist, extending a line from a nearby outlet should be a fairly simple task. Installing the pump itself usually takes about an hour. If you’re handy, you can probably do the job yourself.

What’s the best time of year to paint the exterior of your house?

Assuming your house has wood siding, you want to paint when the relative humidity is about average for the year. That’s also the point at which the wood will be about its average size.

Paint and good construction should keep the siding from absorbing copious amounts of liquid water, but water vapor still gets through. On a humid summer day, the wood will absorb moisture and expand, mostly across its width. On a crisp, cold winter day, the moisture level in the wood will drop and the wood will shrink.

To stay attached, paint must expand and contract along with the woods. Painting mid-size wood minimizes how much the paint must stretch, so the paint job lasts longer.

The best conditions tend to occur in the spring and in the fall, so you could theoretically pick either season. However, since theory and reality often turn out to be different things, it often makes sense to plan for a spring job.

If you’re hiring the work out, that gives you more leeway in case the contractor you pick doesn’t show up in time. And if you’re doing the work yourself, it builds in extra time inxxxx some of the preparation.

 Product Info

General Info
How Does it Work?
Cost Savings
S50 Specs
S70T Specs
S02T Specs
Plumbing Layouts
Mechanical FAQ
Operational FAQ

Washington Post


Read A
Success Story!

PDF Format


View Video!
Illustrating the problems of wasting water and energy

 Other Products

Solar Water Heat
Tankless Heaters
Storage Tanks

  Solar Direct    
  Bringing Renewable Technology Down to Earth!   Copyright Notice
© 1986-2016 Solar Direct
All Rights Reserved