I just got this reply on a DIY board:

"I have a tankless water heater...got it online for about $350...MRP was over $800...had a guy from work install it for $60...it works ok as far as heating the water goes...I get nice, long, hot showers now. The only problem I have is the water pressure...it's alot less than I used to have."

Why would I get lower water pressure?

Pete