I'm purchasing a replacement for my failed A/C system. The contractor has guaranteed in writing that I will realize a 30% savings in my electric bill. The amount being saved will be calculated at the end of the year by comparing the energy used during the last year for the old system and the energy used during the first year with the new system. If the 30% savings is not realized, the installer will give me a check to pay for twice the difference between what I paid for energy and would have paid if the 30% savings had been realized. Also, they will make whatever changes are necessary to ensure that the 30% savings is achieved at no cost to me.
I would appreciate any comments/advice/warnings about this guarantee.
Thanks in advance for your help, Bill