outdoor temp resets

CC.Rob

I've been following the thread on outdoor temp reset boiler control systems, and looked over the Brookhaven report that suggests they can be effective with a conventional boiler/baseboard system. These look pretty attractive, particularly for my climate (southern New England, coastal -- not far as the crow flies from Brookhaven), where there are significant shoulder seasons and periodic warm spells (like this week) when a boiler really doesn't need to run full out all the time.

Would be interested in opinions/experience with things like the Honeywell AQ475A, Tekmar 260, (or others) or the "indoor only" setups like Beckett's Heat Manager or Watts Boiler Energy Saver.

My setup is a conventional Burnham Series2, gas-fired. Standard (~550 BTU/h @ 180F) baseboards throughout a ~2000 sq ft house with two heating zones and an indirect water heater on a third zone.

Thanks.

Robert_15

with my experence is it works well if the supply senser is accurate. Honeywell Immersion Well utilizing an 1-1/4" x 1/2" x 1-1/4" c-fip-c tee in the supply & use a boiler bypass or system bypass to keep the water hot enough in the return. the only thing is the min temp on the boiler 135 min so not a great reset curve unless the return is above 135. i use the aq475 it is the basic odr with all the things you would need. long system cycles, comfort, constent temp
i would suggest it

Gene_3

I'm curious

which is more eff, the Beckett or a traditional outdoor reset.

The Beckett senses supply temp and tracks it's drop in speed, dropping fast or slow, if the temp drops slow it considers low load or demand and delays burner start, a reset will raise/lower boiler temp in relation to outdoor temp.

Anyone know of any side by side tests??