[an error occurred while processing this directive]
Posted by Doug Criner on October 07, 2008 at 15:10:38:
In Reply to: Re: Hot-Water Boiler Temp Settings posted by dana on October 07, 2008 at 11:36:23:
Thanks. I have a newly purchased flue-gas analyzer, and intend to check the efficiency when it's a little colder and I get longer run times.
Last year, I measured the flue-gas temperature and made an assumption about excess air. The estimated eff was around 80%. I'll be interested to see what the eff is with the flue-gas analyzer.
The boiler is natural draft, and draft is controlled with an automatic damper connected to the exhaust flue. So, I can adjust the damper if there is too much excess air. What's a good number - 20%?
The boiler is a Kewanee fire-tube, natural gas, 168,000 Btu/hr. The house has about 4,000 sq ft. The walls are insulated, but not as much as today's standards.
Post a Followup