Sorry, another COMcheck question...I am doing a split system for heating and cooling...I have several indoor wall mounted and ceiling cassette units with a heat pump air handler outside...do I need to enter a new "HVAC system" for every wall mounted unit AND every ceiling cassette AND the heat pump? if you look at the capacity column in this screenshot, the units are given in kBtu/h which I do see on the heat pump specs, but not really on the indoor specs...(they give Btu/h / W instead)....thank you...
chansen1226
Apr 17, 20 10:03 am
Just thought I would respond to my own question LOL in case someone ever wants to find answers to COMcheck or REScheck questions, they should email the help desk at energycodes.com...they are so great and responsive!
shellarchitect
Apr 17, 20 6:29 pm
So what's the answer? I've never done a project without a mech engineer....
chansen1226
Apr 17, 20 6:51 pm
After much back and forth, and having gained the understanding that COMcheck / REScheck were created in the 90's and are somewhat lacking in options, the "best" option is to enter the heat pump as it's own HVAC System Type as a "Heat pump: Split system" and select single zone system (...this was confusing to me because there's obviously more than one zone....but if you pick multi zone then you are only offered ducted distribution types and I don't have any ducts...) and then you create a separate HVAC System Type for each indoor unit and call it a "VRF Zone Fan Unit"...cooling equipment will automatically populate which kind of irks me but oh well.
RE not using an engineer: I have asked an installer that we like to spec the units based on our plans and that's what I'm working off of. I feel like engineers are too expensive and they often over engineer and don't know as much as the guys doing the work know. We shall see!
shellarchitect
Apr 18, 20 11:42 pm
Im sure youll be fine, ive also never done a residence
Hi there,
Sorry, another COMcheck question...I am doing a split system for heating and cooling...I have several indoor wall mounted and ceiling cassette units with a heat pump air handler outside...do I need to enter a new "HVAC system" for every wall mounted unit AND every ceiling cassette AND the heat pump? if you look at the capacity column in this screenshot, the units are given in kBtu/h which I do see on the heat pump specs, but not really on the indoor specs...(they give Btu/h / W instead)....thank you...
Just thought I would respond to my own question LOL in case someone ever wants to find answers to COMcheck or REScheck questions, they should email the help desk at energycodes.com...they are so great and responsive!
So what's the answer? I've never done a project without a mech engineer....
After much back and forth, and having gained the understanding that COMcheck / REScheck were created in the 90's and are somewhat lacking in options, the "best" option is to enter the heat pump as it's own HVAC System Type as a "Heat pump: Split system" and select single zone system (...this was confusing to me because there's obviously more than one zone....but if you pick multi zone then you are only offered ducted distribution types and I don't have any ducts...) and then you create a separate HVAC System Type for each indoor unit and call it a "VRF Zone Fan Unit"...cooling equipment will automatically populate which kind of irks me but oh well.
RE not using an engineer: I have asked an installer that we like to spec the units based on our plans and that's what I'm working off of. I feel like engineers are too expensive and they often over engineer and don't know as much as the guys doing the work know. We shall see!
Im sure youll be fine, ive also never done a residence