Only if the customer does not have access to natural gas. If you do not have access to natural gas, you could have any back-up (electric, LP, etc) or no back-up. If you do have access to natural gas, the back-up must be a natural gas back-up. The customer must have a back-up with a natural gas system.
I Do Not Have A Back-Up For My Geothermal System; Do I Qualify For The Incentive
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