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The SANCO₂ is the most environmentally friendly HPWH on the market!
In an effort to protect the Ozone layer and as part of the 2006 Montreal Protocol, all refrigerants are required to have a zero Ozone Depletion Potential (ODP). More recently, focus has turned to the Global Warming Potential (GWP) of refrigerants. The GWP is a standardized metric of how much a given pollutant contributes to Global Warming.
The GWP of a gas refers to the total contribution to global warming resulting from the emission of one unit of that Gas relative to one unit of the reference gas (CO₂) - which is assigned a value of 1. GWP is typically measured as the impact of that Greenhouse Gas over a period of 100 Years.
Many States and Provinces, such as California, are now scrutinizing refrigerants' GWP and requiring the use of low GWP refrigerants (typically those with a GWP below 750).
R134a (seen above) is the refrigerant most commonly used in Heat Pump Water Heaters (HPWH) and has a 100-year GWP of 1,430, well above the recommended threshold of 750.
A single HPWH typically contains approx. 22oz (1.375lbs) of R134a.
1lb of R134a has a 100-year GWP of 1,430.
Therefore, the refrigerant in a single HPWH has the potential for a contribution to Global Warming of 1,966.25 times an equivalent quantity of CO₂ over a 100-year period.
This represents a saving in Greenhouse Gas Emissions of 1,964.8. By using the EPA (Environmental Protection Agency) online calculator at:
we see that this is equivalent to the greenhouse gas emissions produced by burning 100 gallons of gasoline or charging 113,000 smartphones.
The SANCO₂ truly is the most environmentally friendly HPWH on the market!
✔ R744 (CO₂)
A SANCO₂ unit contains 22.9oz (1.43lbs) of CO₂.
1lb of CO₂ has a 100-year GWP of 1.
Therefore, the CO₂ refrigerant in a SANCO₂ unit has the potential for a contribution to Global Warming of 1.43 over the same period.
The SANCO₂ HPWH uses the environmentally friendly CO₂ refrigerant, also known as R744.