37,000 BTU heat pump

MRCOOL 37,000 BTU Multi-Zone

Name: MRCOOL 37,000 BTU Multi-Zone
Brand: MRCOOL

Model #: MULTI5-36HP230C-O

Every spec on this page comes from an official certification record or a cited manufacturer document. The source is linked next to each value.

MRCOOLMULTIMini-split heat pump

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Same housing as MULTI6-48HP230C-O; small details may differ.

Decision guide

What the published numbers mean before you compare every spec.

37,000 BTU is sized across zones. Each zone needs its own load calculation.

At 5°F, certified output is 26,000 BTU/h — 70% of its 47°F rating.

The cited fields do not confirm a pre-charged line set or DIY-line designation for this model.

208/230V equipment; confirm the dedicated circuit and disconnect requirements with an electrician.

HSPF2 9.5 is below the 10.0 average among 63 models in the same rounded capacity class.

A room-by-room load calculation supports this outdoor system across the planned zones.

You have not calculated each zone’s load or accounted for 208/230V equipment.

Multi-zone systems need room-by-room load calculations and zone planning; use Manual J for final sizing.

Outdoor model number	MULTI5-36HP230C-OSource: ENERGY STAR Mini-Split Heat Pumps dataset · 2026-07-23
AHRI reference number	217291698Source: ENERGY STAR Mini-Split Heat Pumps dataset · 2026-07-23
Series	MULTISource: ENERGY STAR Mini-Split Heat Pumps dataset · 2026-07-23
Heating capacity at 47F	37,000 BTU/hSource: ENERGY STAR Mini-Split Heat Pumps dataset · 2026-07-23
Heating capacity at 17F	31,000 BTU/hSource: ENERGY STAR Mini-Split Heat Pumps dataset · 2026-07-23
Heating capacity at 5F	26,000 BTU/hSource: ENERGY STAR Mini-Split Heat Pumps dataset · 2026-07-23
SEER2	24Source: ENERGY STAR Mini-Split Heat Pumps dataset · 2026-07-23
EER2	12Source: ENERGY STAR Mini-Split Heat Pumps dataset · 2026-07-23
HSPF2	9.5Source: ENERGY STAR Mini-Split Heat Pumps dataset · 2026-07-23
Voltage	208/230VSource: Manufacturer spec ↗ · 2026-07-16
Minimum circuit ampacity	30.5 ASource: Manufacturer spec ↗ · 2026-07-16
Maximum breaker / fuse	35 ASource: Manufacturer spec ↗ · 2026-07-16

Values marked ENERGY STAR come from the certification dataset; values marked Manufacturer spec come from the linked product documents.

The sources we cite do not publish these values for this model, so we leave them blank rather than guess.

Indoor model numberLine set length rangePre-charged line setBrand DIY line

Room-size guidance is a starting point, not a load calculation. Confirm sizing and installation requirements with a qualified contractor.