Posted by Mike P on November 06, 2001 at 11:17:51:
In Reply to: Re: Help on sizing boiler posted by Harold Kestenholz - Hydronic Network on November 06, 2001 at 10:19:55:
: : I need help calculating the proper size for a replacement oil fired hot water boiler.
: : Do I just calculate the linear feet of baseboard in the house and multiply by 600?
: *** This will get you in the ballpark - OK
: : What are the pros and cons of erring on the larger
: : size for a boiler?
: *** As the boiler has to be large enough to satisfy the heat demand, yet the heat demand is not often the same as the boiler output, boilers are usually a little 'larger' than required as you can not often buy a boiler with the exact number. A boiler 50% larger than needed will be less efficient in fuel use, but not greatly so.
: : I will also be indirectly heating hot water.
: : Do I need to take this into consideration?
: *** It depends on what your water requirements are; if you are going to supply water for a commercial laundry or gymnasium showers, you must be careful. For ordinary residential use, you do not have to add when using indirect water heating as you have 12 hours to make a tankful hot. The smaller residential boilers can make 40 gallons of hot water in an hour easily. You can study this further at:
: : Thanks for anyone's help.
Harold, Thanks for you help
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