Welcome! Here are the website rules, as well as some tips for using this forum.

# Correct percentage

Options
Member Posts: 2,343
With 1/2" baseboard I believe there should be only 25 ft of affective base in the circuit that will provide you with 15,000 btu @ 20*Del T. I guess as long as you are not going to excessive lengths between base, this should hold. The guy's are sharp in here and will set your mind at ease.
Mike T

• Member Posts: 125
Options

I am wondering something regarding baseboard hot water heater footage: Generally speaking (if all rooms are similar in size, what should the percentage be in the 1st 1/2 of the loop versus the end half of the loop? I know that you want less heater footage in the 1st half otherwise the cooler water would not warm the 2nd part of the house equally - but how much less? I am looking for a rule of thumb and realize that the true test is actually trying it out in the middle of winter to see if there are hot rooms or cold rooms. I am guessing that perhaps it should be something like 35% in 1st half and 65% in the last half. Is there a formula that you can use based on square footage per room?
• Member Posts: 6,106
Options
Formulas

for determining this are included in the HDS oftware and also Modern Hydronics. this article sheds some light for you.

http://www.pmmag.com/CDA/ArticleInformation/features/BNP__Features__Item/0,2379,4093,00.html

hot rod