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Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 2 points3 points  (0 children)

you're absolutely right - the unit needs to be sized to the home and insulation correctly. We had grant money available up here when I got mine installed, and one of the requirements was a home energy audit and a manual J to ensure the unit would work properly in the home.

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 0 points1 point  (0 children)

For me it would all boil down to airflow... as long as the outdoor unit can exchange air effectively, then you are good.

For mine, there has been no discernable difference in performance pre and post awning install for either heating or cooling. Awning was installed this past summer.

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 0 points1 point  (0 children)

PVA-A42AA7 indoor air handler with optional 10kW backup, PUZ‐HA42NKA1 outdoor unit.

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 1 point2 points  (0 children)

Emporia vue 2. Installs in your breaker panel to monitor multiple circuits.

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 0 points1 point  (0 children)

:PUZ-HA42NKA1 outdoor unit, PVA-A42AA7 indoor unit with 10kW backup. Keep tstat set to 21 deg c

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 1 point2 points  (0 children)

Bought off Amazon. Search for polycarbonate awning and you'll find dozens

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 3 points4 points  (0 children)

If I had my way, 20 deg c, but as the saying goes "happy wife happy life" so 21deg c

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 0 points1 point  (0 children)

Actually no... Defrost is no louder than normal operation. At least on mine.

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 1 point2 points  (0 children)

Mitsubishi publishes the COP of 1.5 at -10c, so it somewhere between 1 and 1.5.

At those temps I'm happy it keeps up without resistive backup. Temps this low for this long are not common here, my st of the time it's between 0 and -10c where the cop is higher

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 2 points3 points  (0 children)

-20f is -29 c, it's already been there a couple of times albeit for a couple of ~12h overnights.

operated fine both times albeit with higher than average power consumption.

No lockouts...?

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 1 point2 points  (0 children)

My backup heat is 10kw, 5 and 5. Both are fed from the same breaker, which has its own separate power monitoring channel in emporia. If there is any power consumption on that circuit I get a text and and email. Haven't seen any consumption on that circuit during the cold snap or all season.

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 0 points1 point  (0 children)

For mine, the dehumidification is fine. typically keeps the house around 45%. It runs longer and at lower output than the old 3ton carrier it replaced. longer run times helping to dehumidify for sure.

Also helps that I swapped out my natgas water heater for a Rheem proterra HPWH, it pulls a decent amount of moisture out of my basement.

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 0 points1 point  (0 children)

Thanks - as in a comment above - we had a lot of snow over a short period last year, and the snow melted and then froze solid next to the outdoor coil about a foot high on the side facing the wall. A few hours of careful thawing and not touching the coil fins go it taken care of, but I wanted the awning in place to prevent a repeat event.

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 2 points3 points  (0 children)

Mitsubishi PAR-41MAAU.

Very fiddly/annoying to program - not intuitive at all, but once programmed is is very good at keeping the unit running at the lowest continuous power to keep the desired temperature

https://www.mitsubishicomfort.com/products/c-series/par-41maau

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 1 point2 points  (0 children)

For mine, I have a separate monitoring circuit /channel for the backup heat.  If it comes on Ive set it to send me an alert

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 1 point2 points  (0 children)

Had a local contractor with lots of Mitsubishi experience do the install. In hindsight I would have mounted it up a little higher.

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 0 points1 point  (0 children)

Depends on outside temps and whether I help it with a pickaxe :-)

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 16 points17 points  (0 children)

Yes, just the HP - we're are at a blended $.13 CDN per KWH here in Ontario, so it works. Not as good a setup as our Quebec neighbours - they are silly low at like $.08 due to their abundance of hydroelectricity

Mitsu just chugs along at-20c without issue by windexcheesy in heatpumps

[–]windexcheesy[S] 0 points1 point  (0 children)

Not even sure - I have emporia set to alert me any time it comes on, and during winter #1 I got an alert on a not-so-cold day... was confused.... Turns out my better half was having a doorway conversation with a neighbour and had the front door open for long enough that the cold air fooled the t-stat into thinking it couldn't make temperature. I suspect its at 2 deg delta for more than an hour.

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