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Published on April 16th, 2012 | by Glenn Meyers

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GUEST POST: Underfloor Heating Fuels Energy Efficiency

This is a timely guest post on underfloor heating, one way to operate a more energy efficient residential heating system.

Underfloor heating is an incredibly efficient way to heat the rooms of a house; it can be relatively cheap to install, there are no mechanisms on show and no maintenance. One of its main benefits is that the heat is distributed evenly about the air space of a room, again making it more efficient to run. As underfloor heating is mostly radiant heat, as opposed to convection heat, little of it will escape through walls and ceilings.

A recent joint study by the Danish Technical University and the University of Padua into the efficiencies of underfloor heating found that radiators and underfloor heating were similar, the principle difference being that underfloor heating, being a radiant system, achieves the same comfort conditions in a room with a lower air temperature than traditional heating.

In general, heat sources are more efficient at converting fuel or electricity into heat at a lower temperature. The study found that by being able to provide effective heating using a cooler water flow temperature, underfloor heating uses less energy than radiator heating fitted in an equivalent building. Condensing boilers are the best choice to be paired with this kind of heating as they work well at the lower temperatures required. Lower air temperatures also have the effect of reducing energy losses through air movement.

Equally, in order to remain effective, a heating system’s water temperature needs to increase as the size or surface area of the emitter decreases. Thus, larger area emitters, such as underfloor heating, enable the heat source to run most efficiently. In turn, this feature makes underfloor heating the ideal choice when teamed with renewable energy sources, such as ground source heat pumps.

Ground source heat pump systems harness natural heat from the earth to boost efficiency of the heating system. Due to the relatively low temperatures that ground source heating pumps produce (around 16°c), they work best with underfloor heating as opposed to radiators, as underfloor heating systems operate at a much lower temperature when heating the air of a room to the same temperature.

Condensing boilers similarly are an excellent form of heat source to companion underfloor heating. They work by recovering much of the waste heat, normally rejected into the atmosphere from the flue of a conventional (non-condensing) boiler. This is accomplished using an extra-large heat exchanger or sometimes two heat exchangers within the boiler, which maximizes heat transfer from the burner, as well as recovering useful heat that would normally be lost with the flue gases. Using a condensing gas boiler with underfloor heating, the energy reduction has been shown to be around 5%. With a ground-source heat pump the reduction jumps to 30 percent.

All of these factors go towards making underfloor heating an efficient, cost-effective form of heating with potentially significant implications for environmental impact.

Underfloor Heating Systems offer high-quality warm water underfloor heating. Their technical team has years of experience in all types of underfloor heating.

 

 

Guyana Goldfields Inc. Signs Memorandum of Understanding for the Mineral Agreement with the Government of Guyana; Mining License to be Issued Within 45 Days.

Economics Week October 21, 2011 Guyana Goldfields Inc. (TSX: GUY) (“GGI” or “the Company”) is pleased to announce that it has signed a Memorandum of Understanding (“MOU”) for the Mineral Agreement (“MA”) and Mining License with the Government of Guyana for the 100% owned Aurora Gold Project located in Guyana, South America.

The MOU sets out the key terms of the MA, also known as a Fiscal or Stability Agreement, which is a comprehensive agreement that outlines the fiscal terms and conditions for the development and mining of the Aurora Gold Project. Significant among the terms of the MOU are:

o Mining royalty of 5% on gold sales at a price of gold of US $1,000/oz or lesso Mining royalty of 8% on gold sales at a price of gold over US $1,000/ozo Corporate income tax rate of 30%o A Mineral Agreement and Mining License and all relevant permits and approvals to be issued within 45 days of signing the MOU. here memorandum of understanding

The MA is the final step in obtaining the Mining License since the Company has already received its Environmental Permit in September 2010. The Mineral Agreement signals the commitment of the Government of Guyana and the Company to the development of the Aurora Gold Project. This watershed agreement is an important milestone for GGI as it will allow the advancement of the mine development project under a clear and stable fiscal and royalty regime.

Mr. Patrick Sheridan Jr., CEO states, “We are pleased to have concluded extensive negotiations with the Guyanese Government on the fiscal terms included in the Memorandum of Understanding for this historic Mineral Agreement and look forward to obtaining our Mining License in order to build and operate the Aurora Gold Project. We have agreed upon fair and reasonable terms for the future success of the Aurora mine.” This landmark agreement, which strikes a fair and reasonable balance of taxation and royalties for gold mining, reaffirms GGI’s view that Guyana is “open for business”. go to website memorandum of understanding

Honourable Sam Hinds, Prime Minister and Minister of Mines in Guyana states, “The Government welcomes and fully supports all investment, foreign and local, in the mining sector and are pleased that we have come to a fiscal agreement in order for the long-awaited development of the Aurora Project to begin. We look forward to working alongside GGI as they move towards production.” Up until now, Guyana Goldfields has conducted off-site infrastructure construction work in preparation for the development and construction of the Aurora Gold Project. Upon obtaining the Mining License, the Company plans to initiate the construction of the on-site infrastructures including a new camp, airstrip, river dyke and completing road access to the site, which will be followed by the construction of the mining facilities.

Guyana Goldfields will be hosting a conference call for anyone wishing to address questions to management regarding the terms of the Memorandum of Understanding for the Mineral Agreement and Mining License.

Conference Call Details:

Date of Call: Wednesday, October 5, 2011 Time of Call: 11:00am EST Conference ID: 15229257 Dial-In Numbers:

North America Toll-Free:

International: (888) 231-8191 For anyone not able to participate in the conference call, an audio webcast will be available for 90 days through the following link:




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About the Author

Writer, documentary producer, and director. Meyers is a contributor to CleanTechnica, and founder of Green Streets MediaTrain, a communications connection and eLearning hub. As an independent producer, he's been involved in the development, production and distribution of television and distance learning programs for both the education industry and corporate sector. He also is an avid gardener and loves sustainable innovation.



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