This is my setup at home installed two years ago
Biasi B-4, direct vented.
Beckett NX w/ .6gph 60deg nozzle
Honeywell R7148P Rev 5
Bock 40Gal indirect DHW, T-stat set at 120
All Zones Controlled with Taco "00" Circulators
Zone one w/ pri, DHW
Zone two, first floor radiators on a loop.
Zone three, not active, a loop for a FirstCo. HydroAir Handler.
I was looking at the Becket Heat Manager or an Outdoor Reset to improve efficiency of the system. Currently the low temp on the biasi is 150deg. and high limit is 170. The Becket NX burner has a 45sec pre-purge and set to 4min post purge. When there is a call or heat from the DHW it cycles and the boiler will sit at 170 for hours, and when there is a call for heat the boiler is already at 170 but due to the system the burner fires and the circulator for zone 2 turn on and a heat cycle is completed etc..
It seems to me the Heat Manager wold be beneficial in my case as the circulator could be turned on without the need for the burner to fire.
I also had the idea if it is possible to for lack of a better word have something installed for a post-purge cycle for the circulator pump, after a call for heat is satisfied the circulators would continue to run for xx time. I know Taco makes a SR503-ext that has a plug in module to accomplish this but I'd like to know if there are alternatives that are available that can be installed by a HVAC Pro rather than buying and having a new Taco zone controller installed just to add this function.
Another idea is to somehow capture the heat going thru the direct vent from the boiler to recapture some of the heat being pumped outside and reuse it in a way to improve reduce the call for heat from DHW if this is even feasible, it just seems that rather than just sending the waste heat outside it could somehow be used sort of like a hydro air system. Are there any products that exist to accomplish this?
I'm also planing on insulating the basement walls with 2" foam board to reduce heat loss thru the basement walls.
Can anyone offer any suggestions as to my quest for better efficiency. So I can speak with a local HVAC person more knowledgeably about what services I'd like.
If this isn't the correct place to be asking for help/info like this could someone point me to the proper or more appropriate forum
Thanks in Advance