Identical at Design, Different All Season: Inverter, On/Off, Tandem
Inverter, on/off and asymmetric tandem compressors sized equal at 35 °C diverge over the season. Capacity control makes the difference.
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Practical notes on HVAC engineering and selection
Technical deep dives from our engineering team, and shorter notes on how selection software changes day-to-day work.
Defrost-Free Heat Recovery in Cold Climates: Evaporator–Rotor Order
In heat-pump heat recovery, the evaporator–rotor order on the return path drives frosting, defrost and compressor cycling at low outdoor temperatures.
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Hot-Climate Rotor Selection: Summer Latent Deviation, Winter Defrost
In heat-pump heat recovery units, the rotor type sets the summer latent load and compressor power, and the winter frosting risk and defrost continuity.
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Heat Pump Heat Recovery: Where It Fits, Which Design Choices Matter
Where heat pump heat recovery makes sense, and why climate, defrost strategy and coil–rotor layout decide its real performance.
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