To get email notification when someone adds to a thread you're following, click on the star in the thread's header and it will turn yellow; click again to turn it off. To edit your profile, click on the gear.
The Wall has a powerful search engine that will go all the way back to 2002. Use "quotation marks" around multiple-word searches. RIGHT-CLICK on the results and choose Open Link In New Window so you'll be able to get back to your results. Happy searching!
In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.

New Vitodens 200 Specs Online now:

SpeyFitterSpeyFitter Posts: 420Member
The new Vitodens 200 BH2A - Have a look:
Class 'A' Gas Fitter - Certified Hydronic Systems Designer - Journeyman Plumber


  • SpeyFitterSpeyFitter Posts: 420Member
    Extended modulation range

    Did you guys notice the increased range of the Lambda Pro combustion numbers. They now have a lower and higher range with oxygen percentages (down to 3.8% from 4.4% and up to 7.3% from 6.9% oxygen) (and corresponding increased/decreased CO2), probably to accomodate the higher modulation ranges offered. Also, Viessmann has a 6.75 to 1 modulation range on the 19,000 to 125,000 BTUH. I guess manufacturers are pushing the limits now a days and the old days of 5 to 1 are gone perhaps? Are the certification agencies bending the rules or was the numbers changed?
    Class 'A' Gas Fitter - Certified Hydronic Systems Designer - Journeyman Plumber
This discussion has been closed.


It looks like you're new here. If you want to get involved, click one of these buttons!