'Ventilation Finish & Commissioning' Build Show Build: Boston Ep. 23

Proper ventilation system install and commissioning is vital to systems working properly. This episode of the Build Show Boston will discuss the specific details and educate people on how these systems should be installed and operate once functioning and walk through the comissioning process. We meet with Dave from Mitsubishi again to walk through some areas of the house that had extra HVAC needs. Stay tuned for an information dense episode as we get closer to the end of this Boston build!

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[jko]

That’s exactly what I did in 2006. I built the tightest house that we could afford and spent the rest of the budget on insulation and the HVAC system. We cheated the budget in areas like trim and cabinets and flooring. The big challenge here in Wisconsin is finding contractors that are capable/willing to install these products. It continues to this day.
There is a new house under construction across the street from my house and as I watch the construction from day to day I still see the exact same process and products being used. It’s a shame! I know code has gotten better but with just a few more dollars invested it can make such a huge difference.

[jko]

I can vouch for the quiet operation of the outdoor Mitsubishi units especially in the summer. I agree with what Steve said, in the summer I have to stand right next to the unit to see the fans turning to know if it is running or not. In the winter it is just a tiny bit louder but nothing like my old outdoor central air conditioner unit. I could hear my old unit kick on when I was on the opposite side of the house. One day many summers ago it was a typical beautiful summer day with humidity in the 85% range and 97 degrees I was outside and I stopped for a second and all I could hear was the outdoor a/c units running.

[MarcRegan]

One thing I'd love to learn more about is the garage. I remember in an early video Steve saying the garage was not included in the building envelope, but it's a conditioned space. Did you use the same wall assemblies as the rest of the house? Did you guys worry about testing for air leakage? Also, how do you think about ventilation in there if it's fairly air tight with cars idling and such?

[Rondeaunotrondo]

In the hobby room, there will be increased humidity and mold from the soil. The ceiling unit has a merv 2 filter for the coils NOT IAQ and does little to no dehumidifying. How will mold and dew point be managed? Is there ventilation to the room?

[johnwhite]

So the supply side of zhender uses standard hard duct?

[vr]

On a Mitsubishi multi-zone system, what is the most efficient use of the exterior condenser units. Lets say you have 3 indoor 6kbtu units each in a room of 150SF. Can 1, multi-zone condenser efficiently supply the three heads, or should each head have its own condenser? The concern is that a condenser's minimum operating rating will be higher than what a single unit can supply. Making the multi zone less efficient.

[tysleight]

If this is a closed loop then do you have a totally different air filter for the make up air?

[shaner]

Wow! 28 foot ceilings in that 10x12 room to get 34 hundred cubic feet of air

[mpharr]

Why not make the duct connections to US LEED Commercial Standard?

[dan]

Was it possible to combine the mitsubishi and spacepak units? Why didn't you do that?

[johnwhite]

I would like zhender rep to expand on his claim they totally isolate the two flows-don’t every ervs donthat// what is different than a zhender? /

[mkidd]

Cost for maintaining this system over 20 years?

[stevemcfarland]

I am curious how a geothermal system would have been... what was the decision process? Also with warm board do you use the heat pumps for heating? A lot if Zehnder commercials with Matt and Steve but I'm really interested in the system as a whole.

[harveypaxton]

How do these interface with gas-fired appliances?

[scottrodman]

It reminded me of the need to add filter changes to my calendar. Time will tell whether the 6 month time frame is sufficient or whether we need to move that to changes more often. 2 years for the core cleaning.

[michaelwells]

Matt ~ These guys from BOSTIN. aren’t making themselves Clear at all.... can you explain to us what they are talking About. ???