Comparison : |
Item # GX90-550(A), Xtreme™ Low NOx High-Input, Fast Recovery Commercial Water Heaters Item # GX90-640(A), Xtreme™ Low NOx High-Input, Fast Recovery Commercial Water Heaters Item # GX90-715(A), Xtreme™ Low NOx High-Input, Fast Recovery Commercial Water Heaters Item # GX90-500(A), Xtreme™ Low NOx High-Input, Fast Recovery Commercial Water Heaters Item # GX90-600(A), Xtreme™ Low NOx High-Input, Fast Recovery Commercial Water Heaters
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