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September 09, 2006



EER = Cop * 3.4.  How the heck do you have a 30 EER with only a 5 CoP?


Surface water sources for heat pumping? Pretty good idea. Add a pond to heat your home. it would be much cheaper than trenching pipes in all over the yard or drilling two wells to supply water and then return it to groundwater.

How about tapping heat from municipal water supplies to heat homes via heat pump? The flow could be increased by having the water system incorporate loops back to the municipal well or water treatment plant.

Recently on Grist's blog a St. Paul homeowner lamented the fact that his yard is not big enough to install the necessary underground pipes to feed a geothermal heat pump system, this municipal supply of ground temperature water might just solve that problem.

It would draw on the heat supply from all over the entire city water supply pipe system. The 55 degree water supplying a great heat source for heat pumps in winter and direct cooling instead of expensive, energy wasting air conditioning in summer.

This is a way to conserve at least 1/3 of total US energy use. Geothermal heat pump and direct circulation heating and cooling, instead of burning natural gas, fuel oil, or using fossil fuel generated electricity.


Dr. X.

Principally, I am cautious when it comes to tampering with the drinking water supply. I don't like the temperature of my drinking water to be above 60°F.

But then I realized that the fraction of the water supply used for drinking is very tiny. Most water is used for flushing toilets, showering and washing dishes and clothes. Therefore, the energy cost of keeping a bottle of tap water in the fridge (as I do now because our drinking water is too warm) is very small compared to the massive energy saving of having either direct cooling with municipal water or through a heat pump.

If you think about it, the water supply is actually geothermal heat/cold reservior brought directly into your home.

I think I'm starting to like this idea more and more. :-)


This may be too late, but note that:

1) municipal water system sources pressurize the water supply through the hx which assures no leakage INTO the building heat pump water circulation (and enables the water pressure to be returned to the municipal system pipes; and

2) taking heat OUT of the water system reduces water temp by, typically, 2 degrees (e.g., 55F in, 53F out) - your drinking water will be cooler!? :-)


Have they done any combination with solar? If you could add a loop under the heat pumps loop, you can use abundant summer heat to reduce the energy required at the compressor. This could even be done with solar pool heaters which are a lot cheaper than DHW panels.
For cooling you could reverse the same system (in a separate area) and use the same panels as radiators. You would have to be careful with freezing in the panels, but solar controls already have a freezing sensor built in.


heat pumps are a great way to save energy. great post!

mark kragh


mark kragh


Here is a video of mine which talks about the general heat pump installation. The video can be found on the KnowYourPlanet.org website at the following link. It will help you understand the basics of what the Heat Pump is and how it can save you energy. I hope you enjoy it.


You can also find the video on YouTube at


Kind regards,


I am considering changing from high efficiency natural gas plus A/C to a ground exchange heat pump. I can find lots of information on how the systems work and equations showing much energy will theoretically be saved, but no one can give me actual results from their installation. I want to know if the estimates I've heard (50% savings on gas and electric bills for my house and given my current system) will hold up in the real world? Does this system achieve what it claims?


That is a great article. Thank you for sharing.

Mark Humphrey

It's best to get an accurate heating and cooling load for the building or home to size the system properly. PSE here in Washington has a tool on their website to help calculate the system size. We can also help you size system for your home or business.
Second the home/business needs to be well insulated and have good quality windows/doors to keep the energy in the structure.

If these changes are made to the home you can achieve up to 70% reduction in utility bills.
If you need some help and you're in Washington State give me an email or call.

Our goal is to help you become energy independent and use the renewable energy from the Earth
Mark J. Humphrey - 425-941-2476 cell



Great article, thank you for sharing!!

We are putting together some useful information about ground source heat pumps and some free resources, including a free saving calculator for the ground source heat pumps.

Check out our website for more information


Jordans 5

I wouldn't care success or failure, for I will only struggle ahead as long as I have been destined to the distance. I wouldn't care the difficulties around, for what I can leave on the earth is only their view of my back since I have been marching toward the horizontal.

Glen McIver

We have air source solar powered heat pumps for areas where geothermal is not as cost effective.


Fire Fly

thank you for the post. you have provided me with great information.

heat pumps

At present there are two kinds of air conditioners that are generally apply in houses.Window fashion systems are placed into a window.

heat pumps

heat pumps are a great way to save energy.i also installed heat pump at my home.great post

Mark J. Humphrey

Hi I'm the owner & IGSHPA Certified installer at Ground Source Energy NW in Kent WA. ClimateMaster has an excellent design software called GeoDesign (http://www.climatemaster.com/index/geodesigner) that you can download to see the many benefits. If you know your heating/cooling Btu/hr and plug in the city you live in. This software will give you an annual cost savings over other options like Gas with A/C. If you are still having troubles determining the savings please email me at: Mark@GroundSourcEnergyNW.com with questions. Geothermal heating/cooling is the answer to the worlds energy crisis. You cant beat free hot water in the summer when you cool your home or business.

NZ Heat pump

Based on the articles I've read a couple of days ago, the biggest benefit of GHPs or Heat Pumps is that they use 25%–50% less electricity than conventional heating or cooling systems. also provide excellent "zone" space conditioning, allowing different parts of your home to be heated or cooled to different temperatures.Anyway, thanks for the post!This will definitely help me in my research. Great article!

Pond Pumps

Thanks for this informative post. The addition of solar energy in the system change the equation? For example using solar energy to supply the electricity needed to operate the machine geothermal.

Pond Filters

They integrated natural lakes or storm water retention or detention basins in their design Water furnace_coil, routing exchange tubes of fluid through the streets entropy to the surface, thus avoiding the need for salt and sand. They are one of the leading manufacturers of geothermal heat pumps and water source.

complete link building

I think this is very useful information. Geothermal heat pumps are also known under various names, including geothermal, earth coupled ground, or heat pump water source. The scientific and technological communities prefer the term "geothermal"or "geothermal heat pumps"to avoid confusion with the conventional geothermal, which uses a heat source at high temperatures to produce electricity.

psd 2 html

I think this is very nice information about head pump. I want to some head pump information share with you.Tube filled with antifreeze absorbs heat from the earth and carries it to a geothermal heat pump. Even in winter, ground temperatures are high enough to allow the system to work, but hundreds of feet of pipe should be buried and the excavation can be extended.I like all blogger information.

heat pumps

I am kinda skeptical with regards to the design, perhaps a deeper calculation of the heat output will persuade me. Thanks!


Heat pumps are great way to save money but they are a great inveatment.

Fountain Pumps

It would draw on the calefaction accumulation from all over the absolute city-limits baptize accumulation aqueduct system. The amount baptize bartering a abundant calefaction antecedent for calefaction pumps in winter and absolute cooling instead of expensive, activity crumbling air conditioning in summer.

source heat pumps

Geothermal heating and cooling systems can be designed to work as a singular heating or cooling system depending upon the climate of the area. This design of ground source heat pump integrated with water source is innovative. I'm hoping for it to work better and more efficient.


Geothermal heat pump systems have lesser maintenance requirements than most other systems. When properly installed, the underground components are virtually worry-free.And because they use fewer mechanical components, geothermal heat pumps are durable and highly reliable.


When a person decorates his home, his goals normally reach the outdoor part of the property. Most people go for building a nice garden to accentuate their yard nicely. Some just go for a simple cluster of nice plants and shrubbery while others tend to take it to the next level and add special effects like a fountain with the help of regular or submersible pond pumps.

Heat Pumps Installation

Very nice, gives me a lot of inspiration being right in the midst of a redesign. It’s all in the details and comment forms are definitely overlooked more often than not. Time well spent on this post.

Mike Graebner

A hybrid approach using a Ground Source Heat Pump system combined with Photovoltaic (in the appropriate geographical area) could reduce the energy footprint significantly. The PV units would supply at least a portion of the energy used to drive the pump.

plumbing supplies

Interesting post. This takes advantage of the moderate temperatures in the ground to boost efficiency and reduce the operational costs of heating and cooling systems.


I can notice that energy blog have sent us a very reliable and informative articles. Thank you for sharing many post with us.
Regarding in this matter, it would be much cheaper than any pipes in all over the yard.

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