You should not run gas from the furnace to any appliances.
Safe, no, a bit safer, yes
Of course If the flue is sized properly
an electric furnace runs off of 208/230 Volts while a typical gas furnace runs off of 120 also a gas furnace will have a valve for the gas relay where the gas enters the furnace.
Gas appliances have electrical control and ignition circuits. A gas furnace, for instance, would have a thermostatically controlled valve that would turn the gas on and an ignition circuit (in newer furnaces without standing pilots) that would ignite the gas. You can add a light circuit to the list if your gas oven has an interior light.
Heck NO if it a gas unit or Uses Bunker C
Need to know what type of furnace, electric, gas, or oil before question can be answered.
I assume you mean black iron pipe, which is used to run the gas line to your furnace.
You can find a schematic for a gas furnace on the website, Uncionradio.
As I understand the Gas engineer is the person who can work on the Natural or propane gas using appliances, such as range cookers, Boilers etc etc. The oil engineer is the person who can work on the boilers or appliances which run on the light oil, heavy.
I assume you mean black iron pipe, which is used to run the gas line to your furnace.
There are many places to find gas furnace prices. One can look on sites like Furnace Price Guides, Century Gas Furnace, and Consumer Reports. One can also find gas furnace prices by going to a local heating supply store.
A gas furnace is a furnace that operates to keep your house warm with the use of gas. Gas furnaces are very energy efficient furnaces, and are the most common furnaces used in North America.