Hope some one can help! I have an Eko 40 hooked up (no storage) and running as we speak. I had someone else do the install for me because of the amount of free time I have. So anyway, back to my issue. My gas furnace keeps running anytime the house calls for heat. After looking around at pictures of other setups, their Eko feed and return are right before the existing furnace on the return side, which makes sense. Here on my system it was installed so that the feed from the Eko is hooked up to the feed from the furnace after it leaves the furnace and runs to the zones, and the eko return is connected to the existing furnace right before it enters the furnace. Is this hookup wrong and the reason the gas furnace keeps kickin on. Another question... My thermostats are connected right to the gas furnace. When a call for heat comes in the gas furnace starts and runs until it hits the desired temp and shuts off. Can I leave this current setup but somehow connect the two furnaces with thermostat wire and make them run together? Or am I better off changing the way the Eko is connected to the system? (Feed and return on the existing boiler return side). Hope this all makes sense.