I would appreciate opinions on the validity of this load calculation.  I'm very new at this, and am not really sure I did it correctly.  I would like to use Mitsubishi Mini-Splits for Heating and Cooling - I think.  I'm open to any suggestions.  I plan on working with an HVAC pro, but I want to be sure at least I know enough to be dangerous (or annoying) before I contract any one...

Thanks all!

Particulars:

Home in Annapolis, MD
Waterfront (but well protected).
Front of house faces NW.

ICF Construction -
Walkout basement of which approximately 50% of total wall space is underground.
36 x 40 Foot Print
Unfinished Basement, Main Floor (Great Room, Master suite, kitchen Living area) and Lofted Second (2 Bedrooms, bath and laundry)
Cathedral Ceiling - R49
LowE Glass
LowE Smart Sun on NW facing  (Andersen  400 Spec)




So, here are the results of HVAC load calculations using "Mass HVAC Sizer V4.0"


EDIT:  I apologize.  Links not working.  Standby.

[URL=http://s660.photobucket.com/user/craigtoo/media/Load_Calc_3.jpg.html][/URL]

[URL=http://s660.photobucket.com/user/craigtoo/media/Load_Calc_4.jpg.html][/URL]

[URL=http://s660.photobucket.com/user/craigtoo/media/Load_Calc_1.jpg.html][/URL]

[URL=http://s660.photobucket.com/user/craigtoo/media/Load_Calc_2.jpg.html][/URL]

[URL=http://s660.photobucket.com/user/craigtoo/media/Harbauer--1.jpg.html][/URL]

[URL=http://s660.photobucket.com/user/craigtoo/media/Harbauer--6.jpg.html][/URL]

I have not used that particular program, but considering the design temp for Baltimore is 15°F I ballparked the heat loss at ~7200 windows, 7300 walls, about 4000 ceiling, I took a wag and said 2000 for subsurface walls, and another 3K for slab losses, since it is a walkout and I don't know what is under the slab for 23K Add infiltration, which is A total crapshoot if it isn't measured and I would have half assed ball parked it at 30K.
In part I would have bumped up my guess because with that much glass, the mean radiant temp is going to be low and you will likely bump up the thermostat a bit higher to be comfortable.

In other words, you are in the ballpark, and the inputs don't seem strange.
Cheers,
Eric

Thanks for the smell check!

Nice drawings, looks like cheif... My rep uses remrate I think. He's tried a few of them, some are buggy and some are not. I like this one you are showing. Some of the man j reports are too much for most people.

where did you get that program?

Posted By Jim on 15 Feb 2015 03:41 PM
where did you get that program?

This is the one.

http://members.cement.org/EBiz55/ProductCatalog/Product.aspx?ID=14

Contact the PCA to see if they plan to have an updated version available. Send me a PM about what you learn and we can go from there.