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Boiler replacement with Lochnivar Knight...Small Zones?

adkhkr Member Posts: 6
From what I have read, small zones in a mod/con setup are no good because of short cycling. I am installing a Lochnivar Knight KBN-081.

I am trying to determine if my current setup will be OK.

Zone 1 - Basement

Zone 2 - 1st Floor Living Room (4700 btuh required)

Zone 3 - 1st Floor Family Room (5800 btuh required)

Zone 4 - 1st Floor Kitchen, Living Room, Bathroom (10800 btuh required)

Zone 5 - 2nd Floor

I have the living room on a separate zone because I installed a gas fireplace in the family room and with that on the heat would never come on in the living room and it would get cold. And because the LR has french doors and the room is typically closed off it makes sense to have that independent but it is a small zone. I keep the temp at 60 in that room and only turn it up if I'm in there. The family room is on a separate zone from the rest of the 1st floor because of the fireplace. So I have 3 zones on the first floor.

Is the first floor setup OK or should I combine zones?


  • Slimpickins
    Slimpickins Member Posts: 331
    buffer tank

    Why not use the Lochinvar Knight WHN055? It would be closer to your output. If you're already committed to the KBN081, Lochinvar makes a nice buffer tank if you're concerned about short cycling and you wouldn't have to use a hydraulic separator or prim/sec. piping
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