EXINDA Insights

Four-Pipe Air-to-Water Heat Pump for Simultaneous Heating and Cooling: Selecting for All-Electric Offices, Schools and Hotels

Where a four-pipe air-to-water heat pump replaces the chiller-plus-boiler plant in a new all-electric building, how the specification describes it, how the simultaneous mode is rated, and how the E...

Ceiling-Ducted vs Wall-Mounted All-in-One Heat Pumps: Which Fits Your Building?

Both have no outdoor unit. One serves a room, the other serves a suite and brings in fresh air. How to pick between wall-mounted and ceiling-ducted all-in-one heat pumps for apartments.

Cold-Climate Heating Check for All-in-One Heat Pumps: What to Verify at Your Design Temperature

How to check an all-in-one heat pump at your winter design temperature: read the 17°F and 5°F ratings, add the electric heat by the staging table, compare the total to the suite load, and size the ...

Sizing Ductwork for a Ceiling-Ducted All-in-One Heat Pump: Will the Far Bedroom Get Enough Air?

Will the far bedroom get enough air? How to size ductwork for a ceiling-ducted all-in-one heat pump: read the fan curve, add up the longest run, pick the supply connection, do the outdoor ducts sep...

Modular Heat Pump Water Volume Sizing: A Practical Guide

Modular heat pump water volume sizing starts with the water available to each operating stage. Follow a worked example to check system volume, size a buffer tank and review low-load and defrost con...

Modular Heat Pump Staging: Flow and Temperature Stability

Modular heat pump staging requires coordinated flow, temperature sensing and capacity control. EXINDA explains the design and commissioning checks that help project teams assess plant stability.