REMRATE Modeling of 2 stage Heat Pumps - Including GSHP

I have a REMRATE /Modeling Question. How are people determining percentage of load when modeling two stage heat-pumps (especially GSHP) when entering load percentage for each stage?

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Jeremy, I don't have the latest version so there may be a new input I'm not familiar with.

If you're talking about the Load Served (%) field on the Mechanical Equipment Properties Summary form, that field refers to the breakdown between multiple systems, which is generally based on the MJ model. For example, if there are separate systems for upstairs and downstairs, you would take a simple ratio of the MJ loads for those two zones, separately for heating and cooling. This percentage is not impacted by the equipment, so the result would be the same whether the equipment is single or multi-stage, or if the equipment is oversized, or not.

When you drill down to the equipment library form, the version I have makes no distinction between single-stage and multi-stage. If this has changed and is what your query relates to, please post a screenshot of the form and I'll try to further assist.

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