Ductless minisplits have a lot going for them. These high-performance air-source heat pumps operate efficiently at much lower outdoor temperatures than standard heat pumps, and they don’t suffer the same energy losses due to leaky ducts. A tight, well-insulated house may need only one or two wall-mounted heads to maintain comfort indoor conditions, in summer and winter.
It’s the “wall-mounted” part, however, that not everyone warms up to.
That is the case with Jerry Liebler’s wife — or “boss,” as Jerry introduces her in a recent Q&A post at Green Building Advisor.
Liebler is convinced a Mitsubishi Hyper Heating system would meet his heating and cooling needs. But the “boss dislikes the looks of minisplit indoor units.”
Liebler’s proposed solution is to place the head in a closet along with a small air handler and an outlet duct through the floor.
“A ‘shelf’ would run horizontally around the minisplit and the outlet duct of the air handler,” he writes. “With the closet door closed there would, in effect, be a ‘plenum’ above the shelf, pressurized by the air handler.”
Liebler thinks the air handler’s motor would overcome the friction losses of the duct work. Ducts through the closet floor would be connected to conventional ducts to distribute heated or cooled air.
“Has anyone done something similar?” he asks. “See any problems?”
That’s the topic for this Q&A Spotlight.
Have you thought of a ducted minisplit?
“You don’t have to invent (and cobble together) your own ducted minisplit unit,” Holladay writes.
Yes, Liebler says, but none of them is capable of heating and cooling more than a couple of rooms, and…