On Aug 23, 8:17*am, "desgnr" wrote:
Would there be much difference in operating costs for a 40 gallon gas water
heater vs. a 30 gallon ?

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Dell Inspiron
Pentium dual-core 2.2 GHz
2 GB DDR2 SDRAM
Windows Vista Home Premium SP1

If I was shopping for a water heater I would go to www.energystar.gov
and compare all by EF, Energy Factor is their efficency rating.