HVAC Design: Zoning East-West like Manual J Tells Us To

[@beurky]

Fantastic

[@beurky]

I was always big on separate systems per floor, but I normally deal with tall and narrow homes. Big wide homes with lots of side windows, this is excellent!

[@HomePerformance]

Thx man

[@timdestasiohvac]

I agree 100% east west zoning is better. Coming from a contractor standpoint, the NC Admimistrative code REQUIRES each level have its own zone regardless of what the calculations say. I recently ran into this on a high performance design on a 3 suite residence. I zoned per suite, perfectly ,matched the equipment with a 18k Mitsubishi system for each zone. The planning and zoning rejected it because of that rule. Since Mitsubishi doesn’t offer an OEM zoning solution and the aftermarket ones dumb them down, I ended up having to go with a 3 ton Trane Resolute, Dip switched down to a 2 ton, matched with a 2 ton air handler. So essentially, I was forced to oversized because of this dumb rule. The reason why I bring this up is that there are external reasons preventing us from zoning the smartest way and these houses eventually have to be approved and inspected. The contractors who install our designs are stuck holding the bag. Fortunately in this case, because of my experience as an NC hvac contractor I prepped the project team for this and we had a backup plan.

[@HomePerformance]

Agree 100% code needs to get smarter about this stuff. Make up air too.

[@trickstothetrades1801]

Well thought out thank you

[@HomePerformance]

Welcome buddy

[@emirbukva5393]

@HomePerformance totally unrelated to this video: exposure to ads for ductless HRV/ERVs (vents-us twinfresh for example) made me super Interesred in your review of them. Compared to standard units, shortcomings are unavoidable but are the principles sound and is there value for retrofits or certain applications?

[@HomePerformance]

Yes, there is a perfect application for everything. I just find that 99% of the time ducting makes things better.

[@johnwhite2576]

Corbett -teh symmetry fo the house and the dominance of sunlight in such a southern location certainly militate for thinking east west. But how is the stack effect worked into thsi approach ? Tat can be pretty substantial in a less sunlit environment, and in northern climates i woudl think the north south facade differences would be substaila even with an intelligent landscaping startegy re evergreens o north side and deciduous tress on south side etc. I wait the actual duct layout to see te implications of this emphasis and mechanical feasibility. Another related approach is splitting a two story house sagitally ie up don this can work well esp in winter when setting back one side (daytime side) and turning eat up on teh other half fo house. I do think a video outline when zoning makes sense in theory is in order

[@HomePerformance]

HVAC Zoning: Do You Need It, or Not? kzbin.info/www/bejne/j2GviaZ9qriEfKc

[@moe85moe85]

How do you think about usage patterns of during the day downstairs and in the bedrooms at night when designing the system as East / West - is it just that you drive all the conditioned space to the same temperature?

[@HomePerformance]

Yes, I personally am convinced most people think they want rooms different temperatures because the home they're in now has problems with mean radiant temperature. They look at the thermostat and conclude that they need a bedroom that's 65 deg F, when the problem is really not the air temp at all.

[@cokeiceeeee]

shouldnt there be enough air movement to mittigate this? at least in a high performance house.

[@HomePerformance]

Yes, IF you keep ceiling fans running and doors open and interior walls uninsulated you likely won’t notice at all for that 2-3 hour period with one system.

[@WhiteWakedNProud]

dude please delete your question, you just asked if my systems designed properly will it work? we'll fucking duhhhhhh if it's properly designed it's going to work bitchen

[@virgil3241]

Unfortunatly, a lot of times is when you move into a house, you have to deal with what you get. And can you fix it, sure. Can a person afford it, thats another story. And with HVAC, each model that works for one area of the countruy, wont work for the other. Or type of house. sun exposure, wind exposure, Reading things on HVAC for a decade now, but not an expert, what works for one house, can be totally different on the other side of the street even I moved into a 2 zoned system, basement and main floor. Would east to west be better, maybe. My mechanical room is on the far side of the house, not the middle, so air flow is lower the farther away you get. So probably, but the work for that would mean totaly changing the way the trunks are set up

[@Gabriel-vz7ml]

Good show! Thank you.

[@HomePerformance]

Thx for following Gabriel