Gas heaters produce more heat when compared to electric heaters in the same amount of time. Since gas is generally cheaper than electricity, a gas heater has lower operating cost.Electric space heaters are cheaper only when a small space is to be heated at lower temperature settings.as heaters produce more heat when compared to electric heaters in the same amount of time. Since gas is generally cheaper than electricity, a gas heater has lower operating cost.
EPNS stands for Electro Plated Nickel Silver. Nickel Silver (sometimes stainless steel) is the base metal onto which silver is plated. Despite its name, nickel silver contains no silver at all, but is an alloy of nickel, zinc & copper.he most common is EPNS (Electro Plated Nickel Silver) but many other symbols are used: 1  EPBM (Electro Plated Britannia Metal). 2  EPCA (Electro Plated Copper Alloy). 3  ESM (Electro Plated Silver Mounts).
The âNâ stands for âNegativeâ and the âPâ stands for âPositiveâ. With respect to sensors, an NPN device is one that can switch the negative side of the circuit while a PNP device switches the positive side.PN and PNP are technical terms for the type of transistor used to switch the output. The type of transistor determines the direction of current flow. For additional information about NPN-PNP devices, connections, and working with PLCâs check out the following from the Industrial Electrical and Maintenance forum.