3 ms·

> Wall mounted heat pumps are definitely not great to heat your house because of their placement higher on the wall means that your head is getting blasted with

> Wall mounted heat pumps are definitely not great to heat your house because of their placement higher on the wall means that your head is getting blasted with hot air while the air at floor level remains cooler. As a retrofit for a house with electrical heating it's just not as comfortable. I don't get this at all. Hot air rises and cold air falls so you have that problem with all heating and cooling. Maybe if you're talking about a very confined space, but I run my aircon continuously to get the temperature I want and it's generally not blowing on anyone. If it is I turn the fan down, which works just as well but is slower when starting off with a hot or cold room.

belval 3y ago
> you have that problem with all heating and cooling This is probably regional, but in Canada it is common to have heatpumps/AC for cold and electrical heating/furnace for heat. That means your cold is coming from the top of the wall (where the wall unit is) and your heat is coming from near the floor with baseboard heaters. That gives you a better mix of air and a better overall comfort. Furnace exits also tend to be embedded in the floor at the bottom of a wall/window. Wall mounted heatpumps mess with that paradigm because the air, whether hot or cold comes in near the ceiling. That actually works great for cold, but whn heating the hot air simply won't come down. If you have a second floor it will instead heat up that second floor. It's not the worst thing in the world, but you definitely have a large temperature gradient from the first floor floor to the second floor ceiling that is noticeable. Especially when going down the stairs. In my case it will be around 19-20C at the lowest point and 23C at the highest.
throw0101a 3y ago
You generally want air mixing, so it doesn't necessary matter where the units are. There's an entire procedure that HVAC+D contractors (should) follow when designing a new system (and possibly for retrofits/renos) on just selecting the vents at the end of your ducts for this: * https://www.acca.org/standards/technical-manuals/manual-t https://www.acca.org/standards/technical-manuals/manual-t * https://www.nrel.gov/docs/fy12osti/53352.pdf https://www.nrel.gov/docs/fy12osti/53352.pdf
- canadianfella 3y ago
  What is the D for?
  - Sohcahtoa82 3y ago
    The "+D" in HVAC+D is "dehumidification".

belval 3y ago

> you have that problem with all heating and cooling This is probably regional, but in Canada it is common to have heatpumps/AC for cold and electrical heating/furnace for heat. That means your cold is coming from the top of the wall (where the wall unit is) and your heat is coming from near the floor with baseboard heaters. That gives you a better mix of air and a better overall comfort. Furnace exits also tend to be embedded in the floor at the bottom of a wall/window. Wall mounted heatpumps mess with that paradigm because the air, whether hot or cold comes in near the ceiling. That actually works great for cold, but whn heating the hot air simply won't come down. If you have a second floor it will instead heat up that second floor. It's not the worst thing in the world, but you definitely have a large temperature gradient from the first floor floor to the second floor ceiling that is noticeable. Especially when going down the stairs. In my case it will be around 19-20C at the lowest point and 23C at the highest.

throw0101a 3y ago

You generally want air mixing, so it doesn't necessary matter where the units are. There's an entire procedure that HVAC+D contractors (should) follow when designing a new system (and possibly for retrofits/renos) on just selecting the vents at the end of your ducts for this: * https://www.acca.org/standards/technical-manuals/manual-t https://www.acca.org/standards/technical-manuals/manual-t * https://www.nrel.gov/docs/fy12osti/53352.pdf https://www.nrel.gov/docs/fy12osti/53352.pdf

canadianfella 3y ago
What is the D for?
- Sohcahtoa82 3y ago
  The "+D" in HVAC+D is "dehumidification".