Should I transfer Home Equity Line balance to credit card?

I have a home equity line with a balance of $87,000 at 7.99% and an offer for a credit card with 0% interest for a full year. I figured if I transfer $20,000 to the credit card I would save about $100 per month in interest. Is this a good idea? Will it hurt my credit to have that on a credit card? Is it better to leave it alone and take an interest deduction on my taxes?