What is the required investment ?  
The level of investment depends on the size of the satellite plant. In any case, AXÈGAZ makes the investment and bills the customer a set monthly rental fee for the satellite plant on a 5-year contract.
How much can expect to save by choosing liquefied natural gas (LNG) ? 
You can plan on saving 10 to 30% over other sources of energy.
How long before the investment pays off ? 
From 6 months to 3 years depending on your consumption and the energy previously used. 
Does the switch to LNG give access to Energy Efficiency Certificates ? 
Yes, provided that the switch involves equipment specifically listed by EC regulations (e.g. high efficiency burners on steam or superheated water boiler, economizers on gaseous effluents of steam boiler, etc.).