May 17, 2020

A Most Cost-Effective Solution To Power Savings

energy digital
window film
Energy Efficiency
6 min
The energy saving power of window film
Written by Darrell Smith, Executive Director, International Window Film Association (IWFA) Saving energy doesnt always make sense to a power supplier...


Written by Darrell Smith, Executive Director, International Window Film Association (IWFA)

Saving energy doesn’t always make sense to a power supplier, especially when they are in business to ‘sell power’. But, when demand exceeds their capacity causing them to purchase power on the open market or have to operate less efficient capacity – then the incentive to reduce consumption is a lot clearer.

So, the idea that highly engineered and layered polyester, professionally installed, on windows – can make a significant difference on energy consumption certainly commands attention. And in a state like California, where heat waves and energy demand is always a balancing act – a product that can cost-effectively cut energy use is worth consideration.

Window film is made from extruded polyester that can include multiple layers that offer a wide variety of performance. Window film now has been engineered using today’s advanced technology to deliver energy savings similar to low-e windows, yet at a fraction of what replacement windows cost. It may knockdown cooling costs in a range that reaches into the double digits.

In California, there are nearly 9,000,000 dwellings built prior to the energy building codes. By professionally installing window film on just 900,000 dwellings or 10 percent, energy consulting firm, ConSol, conservatively estimates window film may cut a typical dwelling’s annual energy use by 10 percent. Taken together this could add up to 7,150,250,000-kilowatt hours. The savings is comparable to what three power plants could produce annually, or the conversion equivalent of 4,000,000 barrels of oil, according to ConSol.

In other words, if window film were retrofitted on a tenth of older dwellings in the Golden State, it is possible to reduce power demand to the point that three 500 megawatt power stations could be put held in reserve in the power hungry state.

In fact the California Energy Commission is doing more than looking at window film, the state has now included it in the latest energy or building code that will be effective in 2014. The forward-looking state is the first in the nation to take this practical step.

“We need to continually look for smart, cost-effective ways to save energy and reduce peak electricity load,” said Commissioner Andrew McAllister of the California Energy Commission. “Window film is a product that needs to be considered as an important retrofit solution as we upgrade legacy dwellings in the Golden State,” he added.

It can save utilities big dollars to reduce the power demand when it is exceeding their capacity. If they have to go on the open market to other suppliers to buy excess power capacity, it almost always can cost them more than they can produce it for. Since power companies are regulated in what they charge their customers, they have to ‘eat’ the difference.

When you add rolling heat waves and the loss of a key power station which was the situation in Southern California last summer and then you can understand when a solution as simple as engineered polyester that can be professionally installed on a home in one to two days, and starts working immediately to reduce power usage, the answer is clear.

Nearly all quality window films can block up to 99 percent of harmful UV rays, something that glass by itself does not. Replacement windows can present other challenges beyond their cost. Polyvinyl chloride windows are generally not recyclable and end up in a landfill when replaced. The energy it takes to produce glass and build a new window can be more than for window film production. For single-family homes, window film installation costs can range from $3 to $11 per square foot, depending on the type of window film installed. More detailed information can be found at the International Window Film Association’s (IWFA) web site,

Research by ConSol has shown that window film is a viable solution to cost-effectively reduce Green House Gases (GHG) and California leads the way. The opportunity for achieving the state’s energy goals may be closer when window film is factored in.

Among the items the new building code for window film requires is a National Fenestration Rating Council (NFRC) certification label, manufacturer’s name, a 10-year warranty certificate, and compliance with the IWFA’s Visual Quality Standards. Although window films are normally used on existing windows, remodelers and contractors can also use the new building code for additional guidance.

Independent analysis conducted by ConSol reported that window film is one of the most cost-effective measures to reduce energy use in California. In fact, window film outpaces traditional techniques such as updating HVAC systems, air sealing and caulking or adding R-38 ceiling insulation. ConSol’s study used many of the same processes the California Energy Commission utilizes in determining relative value of energy savings for the state. The complete report can be found at

The following illustrations and narrative are taken from the ConSol report, which is copyrighted, but available for viewing at the above link.



Over 70% of GHG related to single-family envelope energy consumption can be attributed to homes built before 1980; homes built before any energy codes were adopted in California (see Figure 12). Since most GHG comes from older homes and increasing energy codes on new homes has such a minimal impact, retrofitting existing homes with cost effective energy upgrades is essential to meeting AB 32 GHG reduction goals. Window films are among the most cost effective energy retrofits for existing residential and commercial buildings.

However, the uneven glare coming in through older windows can cause hot spots and damage from UV exposure. Instead of having to replace structurally sound windows, a simple, yet cost-effective solution is to apply a thin layer of window film which will help regulate the temperatures within the home, minimize cooling costs and make the environment more comfortable.



This comparison is meant to demonstrate two things. First, that targeting only new homes, as in the case of Title 24, has a limited potential for reducing GHG emissions compared to targeting existing homes. And second, that window films have a relatively good potential to impact GHG emissions when compared to other retrofit measures. When cost is taken into account as in the previous sections, it is one of the most effective measures that can be considered.

The best opportunities for saving energy with window films in California are in existing buildings, especially in existing high-rise office buildings. New homes are not an attractive opportunity because of the high-energy standards for windows already in place. New non-residential buildings have the same problem. Window films are a more cost effective retrofit opportunity for homes than other measures, however, especially in homes with single pane glass. Existing office buildings are an ideal opportunity for window film retrofits. They contain a large amount of glazing and cooling loads typically dominate. Rates of return on investment are high, even before utility incentives. Window films also demonstrate an effective means of reducing GHG emissions when used in retrofitting existing buildings.

Bottom line: as the research here shows, window film needs to be the first item to be considered in any retrofit situation where energy savings is wanted or needed.

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Oct 19, 2020

Itronics successfully tests manganese recovery process

Scott Birch
3 min
Nevada firm aims to become the primary manganese producer in the United States
Nevada firm aims to become the primary manganese producer in the United States...

Itronics - a Nevada-based emerging cleantech materials growth company that manufacturers fertilisers and produces silver - has successfully tested two proprietary processes that recover manganese, with one process recovering manganese, potassium and zinc from paste produced by processing non-rechargeable alkaline batteries. The second recovers manganese via the company’s Rock Kleen Technology.

Manganese, one of the four most important industrial metals and widely used by the steel industry, has been designated by the US Federal Government as a "critical mineral." It is a major component of non-rechargeable alkaline batteries, one of the largest battery categories sold globally.

The use of manganese in EV batteries is increasing as EV battery technology is shifting to use of more nickel and manganese in battery formulations. But according to the US Department of Interior, there is no mine production of manganese in the United States. As such, Itronics is using its Rock Kleen Technology to test metal recoverability from mine tailings obtained from a former silver mine in western Nevada that has a high manganese content. 

In a statement, Itronics says that its Rock Kleen process recovers silver, manganese, zinc, copper, lead and nickel. The company says that it has calculated – based on laboratory test results – that if a Rock Kleen tailings process is put into commercial production, the former mine site would become the only primary manganese producer in the United States.

Itronics adds that it has also tested non-rechargeable alkaline battery paste recovered by a large domestic battery recycling company to determine if it could use one of its hydrometallurgical processes to solubilize the manganese, potassium, and zinc contained in the paste. This testing was successful, and Itronics was able to produce material useable in two of its fertilisers, it says.

"We believe that the chemistry of the two recovery processes would lend itself to electrochemical recovery of the manganese, zinc, and other metals. At this time electrochemical recovery has been tested for zinc and copper,” says Dr John Whitney, Itronics president. 

“Itronics has been reviewing procedures for electrochemical recovery of manganese and plans to move this technology forward when it is appropriate to do so and has acquired electro-winning equipment needed to do that.

"Because of the two described proprietary technologies, Itronics is positioned to become a domestic manganese producer on a large scale to satisfy domestic demand. The actual manganese products have not yet been defined, except for use in the Company's GOLD'n GRO Multi-Nutrient Fertilisers. However, the Company believes that it will be able to produce chemical manganese products as well as electrochemical products," he adds.

Itronics’ research and development plant is located in Reno, about 40 miles west of the Tesla giga-factory. Its planned cleantech materials campus, which will be located approximately 40 miles south of the Tesla factory, would be the location where the manganese products would be produced.

Panasonic is operating one of the world's largest EV battery factories at the Tesla location. However, Tesla and other companies have announced that EV battery technology is shifting to use of nickel-manganese batteries. Itronics is positioned and located to become a Nevada-0based supplier of manganese products for battery manufacturing as its manganese recovery technologies are advanced, the company states.

A long-term objective for Itronics is to become a leading producer of high purity metals, including the U.S. critical metals manganese and tin, using the Company's breakthrough hydrometallurgy, pyrometallurgy, and electrochemical technologies. ‘Additionally, Itronics is strategically positioned with its portfolio of "Zero Waste Energy Saving Technologies" to help solve the recently declared emergency need for domestic production of Critical Minerals from materials located at mine sites,’ the statement continues.

The Company's growth forecast centers upon its 10-year business plan designed to integrate its Zero Waste Energy Saving Technologies and to grow annual sales from $2 million in 2019, to $113 million in 2025.

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