How to Install Room-By-Room Zoning in an HVAC System | Ask This Old House

Ask This Old House plumbing expert Richard Trethewey learns about an HVAC system that allows each room to be zoned out using smartphone technology.
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How to Install Room-By-Room Zoning in an HVAC System | Ask This Old House
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sanny goldman

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  • Sorry people: They are having a lot of trouble with these. defective dampers Need air bypasses etc. I really wanted to try these in my business but decided to wait until I heard of any problems. glad I waited. I was very leary when I heard they needed no bypass. Well, it sounds like they do! lol

  • i can hear the whistling in the room I'm sitting in now when the other rooms choke off LOL

  • After reading all of the comments from the so-called experts on HVAC I have just one question. If closing the supply vents will destroy the blower motor hit the limits in the furnace/ac unit etc., etc, why do I have manual controls on the all the vents in my home that allow me to do that very thing. With the room zoning controls, I can now centrally control programmatically via wi-fi what I was able to control manually.

  • it sounds like the engineer forgot one thing, most people are saying they need a bypass and that is correct for a non variable Hvac. In order to do it without the bypass you need a designed hvac for variable speeds to not over-pressure the flow. You need a max capacity btu but a variable fan speed. There will still be disadvantages, cost is one of them. size of the evaporator is another. A bypass could also be a good thing if they integrate a water heater into the loop instead of being a separate unit. I don't think current systems will not manage unless major deterioration happens. Plus modifying a hvac system vs designing one from the ground up will be better.

  • This seems fishy the proper way to zone a system is install ducted zone dampers for each floor at the system.

  • What about the static pressure in the duct or friction when the dampers close? What about the return bypass? Only good for a module home or studio apartment

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