Questions about minisplits and Manual J
Is it possible for someone to provide me with a a manual J online without visiting my home? I cannot find anyone in my area who I feel is qualified.
I can provide whatever info is needed. I’ve drawn details sketches of all measurements of my home. I’ve had a blower door test. I know the insulation levels.
We are planning on making improvements over time, however. But I’m interested in a current calculation based on what I have right now. And then as I make improvements I can see how it will adjust the load requirement.
Besides this, I’ve been evaluating mini split systems for some time now. Many of my rooms are small and going to have small load requirements. I noticed recently the MSZ-FH06NA. Is this a new unit? It’s very inexpensive. One issue last year was that the MSZ-FH09NA was the smallest head unit and was oversized for some of my rooms. I know it’s not necessarily ideal to have a head unit in each room, however.
I’m open to the SEZ cassette in certain locations, however, it seems fraught with other issues. What I don’t quite understand is how does this unit work? If it just installs into one ceiling, then why does it need a duct at all? What does the duct connect to if it’s just serving a single room?
My understanding is that this can also serve 2-3 rooms which could bring the overload load requirement closer to the unit capacity. In this case, which room would I install the unit in? Is there any benefit to the room the unit is installed in vs the units connected via ductwork? I’d rather use an FH06NA in these small rooms however due to efficiency and low temp heating capability if it indeed modulates at a much lower BTU/h than the 09NA, though. But the only specs I can find on it suggest that the minimums are the same?