DIY zoning - Canadian TV, Computing and Home Theatre Forums
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post #1 of 4 (permalink) Old 2012-04-04, 03:04 PM Thread Starter
Join Date: Nov 2007
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DIY zoning

Looking at adding some servos to control register vents where I can run wire, and servos on dampers that lead to 2nd floor.

How do I know if there is too much back pressure from closing off many outlets? No a/c.

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post #2 of 4 (permalink) Old 2012-04-04, 06:22 PM
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Static pressure readings and/or temperature rise.

Licenced HVAC TECH: "Without seeing your problem i can only offer suggestions, no warranty is included with my advice"
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post #3 of 4 (permalink) Old 2012-04-04, 11:28 PM
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A bypass damper/duct may be required.

Zoning is best left for 2-stage systems.

For a heat only system, adjusting dampers may suffice; I'm not sold on zoning, but that might be because I don't know much about it. A 2-story house can heat relatively well on a single zone if the duct system doesn't have major design flaws.

WARNING: The HVAC information I provide is not based on field experience and DOES NOT constitute professional advice.
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post #4 of 4 (permalink) Old 2012-04-04, 11:38 PM
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With heat only, this should be a no brainer and should be possible manually. Close the registers (and flow dampers if there are any) somewhat in rooms that are too warm and open them completely where you need the heat. With A/C it's tricky because you need to "reverse" the positions for each season, but with heat it should be quite easy.

Then check your temperature rise at the furnace to ensure you're not exceeding the max.

Why do you need electrical control? Are these rooms used sometimes and not at other times? Supplemental heat may be a better, easier, more cost effective alternative.

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