Resource Library

What is the main advantage of small diameter tubes for the design of air conditioner coils?

Smaller diameter tubes allow for more effective heat transfer.
What is the melting point of copper?

1083°C
Is copper an essential element?

Yes, copper is as vital as calcium, iron and zinc. An adult needs 0.9mg of copper every day to maintian good health. Nuts, seafood, wholegrain cereas and offal are good sources of copper and a balanced diet should provide adequate copper.
What is the minimum pitch for long strip copper roofing?

3 degrees.
Is hot patination of copper using ferric nitrate allowed? If so what are the safety implications?

Yes, it has been used for many years. However the nitrous oxide fumes given off when absorbed into surrounding fabric create a fire hazard. Also energy is used in the heating process. Better to patinate cold or use prepatinated copper.
What is the minimum pitch for long strip copper roofing?

3 degrees.
What material is recommended for underground pipe fittings?

Gunmetal or dezincification resistant brass.
What is the minimum pitch for traditional copper roofing?

1 degree, using batten rolls.
Will commercial grades of copper become hard (like steel) if they are cooled rapidly after heating?

No. Copper is not susceptible to precipitation hardening.
“Energy Efficiency First”: How to make it happen

The Coalition for ENERGY SAVINGS, May 2015

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