Wife won't let me shut down the oil boiler just yet. Nights here still dip into the 30's and I hear the oil boiler kick on around 4 am. Out of curiosity, when did you tie-in your wood boiler? If done so in warm temps, did you perform a test run to ensure everything worked properly? I'd hate to do a tie-in during summer months and wait until the fall only to find out something has to be altered.