Claus, your respected voice is needed as an antidote to the hypnotized fixation too many in the design community have for the latest
app or gadget.
While the fortunate few design huge buildings where there will be a maintenance staff 24 - 7 to override the latest app or gadget, many of us do smaller buildings that will not have a practical, human presence around, so we must use common sense in how many chips separate the occupants from the HVAC.
FIRST, super insulate building shells to reduce the need for large heating and cooling equipments. With a higher/lower mean radiant temperature on the inner surface of outside walls, we will feel more comfortable even with a lower/higher inside air temperature. Do we really need 80 degree winter inside temperatures ? Do we really need 70 degree summer inside temperatures ?
SECOND, Consider the sun's and wind's hurtful affects, such as western glazing without shading, or big glazing facing cold prevailing winter winds. Meanwhile, take advantage of mother nature for shaded, daylit spaces and operable windows admitting breezes.
Is it such an imposition that we cannot fiddle with home indoor air temperatures while we are half a planet away ? What about a thermostat with a timer ?
It's bad enough when some architects are infatuated by the latest A-I wrinkle, but what about when zealous legislators write them into law ?
Then there is the new coolant for air conditioning/heat pump heating, that will burn (!)
That's easy, say the building codes, "just run the coolant lines in a rated chase!"
Talk to an HVAC installer or repairer. They will tell you that most of the coolant leaks are in the A-Coil, the better to spread coolant into living space.
Put 200 of those coils into a five-story, frame apartment block, have some exigency empty the fire sprinkler pipes, and watch the glow.
At some point, the AIA must ask inconvenient questions about such matters.
John F. Corkill, Jr., AIA
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John F. Corkill, Jr., AIA
Principal
Corkill Cush Reeves P A
Bowie, MD 20720
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