Hi,
I currently have a Bosch gb142 /30 (input 106,000, turn down ratio 5:1), which was installed in 2009. Its combustion chamber started a leak and was replaced under warranty in 2019. A lot of other parts also have been replaced. Right now only the control panel and the fan are original. I don't know how long it would hold up. I am pretty sure that it is way oversized and would like to replace it with a smaller boiler (a higher turn down ratio) when the time comes.
lochinvar WHB085N (turn down 10:1) and htp EFTU-85WBN seem to be best candidates. When I am reading the lochinvar sale brochure, it states "ECM pump technology saves electricity & lowers operating costs. Lochinvar now includes this money saving technology as standard equipment on all WHB & KHB boilers. Using the Smart System to continuously match the target Delta T at all modulation rates this technology makes variable speed pump integration simple and easy." I am confused because my understanding is that the mod-con boilers modulate based on the return water temperature. If a mod-con boiler is installed with a Delta t ecm circulator, then the return water temperature is constant, the boiler would not modulate, right? Am I missing something?
Thanks!
I currently have a Bosch gb142 /30 (input 106,000, turn down ratio 5:1), which was installed in 2009. Its combustion chamber started a leak and was replaced under warranty in 2019. A lot of other parts also have been replaced. Right now only the control panel and the fan are original. I don't know how long it would hold up. I am pretty sure that it is way oversized and would like to replace it with a smaller boiler (a higher turn down ratio) when the time comes.
lochinvar WHB085N (turn down 10:1) and htp EFTU-85WBN seem to be best candidates. When I am reading the lochinvar sale brochure, it states "ECM pump technology saves electricity & lowers operating costs. Lochinvar now includes this money saving technology as standard equipment on all WHB & KHB boilers. Using the Smart System to continuously match the target Delta T at all modulation rates this technology makes variable speed pump integration simple and easy." I am confused because my understanding is that the mod-con boilers modulate based on the return water temperature. If a mod-con boiler is installed with a Delta t ecm circulator, then the return water temperature is constant, the boiler would not modulate, right? Am I missing something?
Thanks!