Home>Discussions>PLUMBING>mod-con boilervs. baseboard heating
2 posts / 0 new
Last post
metalformer
mod-con boilervs. baseboard heating
metalformer

I have never gotten a clear decisive answer about the following- I know a gas fired mod-con boiler operates at a lower water temp to be able to provide the 95%+ efficiency, but since copper fin baseboard requires a minimum of 180degf to operate effectively, does that take mod con boilers off the table for use and it will not be worth the additional investment because the higher temp with a mod con would reduce efficiency to the 85% that a normal gas fired boiler provides?? Are there any boilers gas fired that provide the 180deg that are in the 95% range or is it apples and oranges??

Dobbs
Re: mod-con boilervs. baseboard heating
Dobbs
metalformer wrote:

I have never gotten a clear decisive answer about the following- I know a gas fired mod-con boiler operates at a lower water temp to be able to provide the 95%+ efficiency, but since copper fin baseboard requires a minimum of 180degf to operate effectively, does that take mod con boilers off the table for use and it will not be worth the additional investment because the higher temp with a mod con would reduce efficiency to the 85% that a normal gas fired boiler provides?? Are there any boilers gas fired that provide the 180deg that are in the 95% range or is it apples and oranges??

I've listed below a number of informed articles that deal with your posts-----this turns out to be a complicated, technical and intricate issue that requires expertise and technical knowledge on the part of the local installer you hire, or the hydronic heating system installer who must have expertise in the retrofit installation of modulating-condensing boilers into baseboard systems---you don't want to make the mistake of some homeowners that hire a boiler installer with no mod-con boiler experience, and then get stuck with a system that doesn't do the job.

The authors of these articles are well-known and have extensive knowledge in hydronic heating systems.

I don't believe that there are any hard & fast rules that say that copper fin baseboard (or cast iron radiators) require a minimum 180 F to operate effectively----other issues are involved, such as the amount of baseboard/rads used, flow rate of the hw thru the fixtures, and hw temperature.

http://www.greenbuildingadvisor.com/blogs/dept/guest-blogs/sizing-modulating-condensing-boiler (by Mark Eatherton)

Google: "Can high temperature baseboard co-exist with condensing boilers? by George Carey"
Also Google: "Servicing high efficiency modcon boilers (Contractor Magazine)" by Mark Eatherton

Sponsored Stories

TV Listings

Find TV listings for This Old House and Ask This Old House in your area.