Daikin 5 Ton Heat Pump vs. Air Conditioner for a Grow Room: R32, SEER2, Three-Phase Voltage, and the Cooling Math

A flowering room is a heat source. The lights turn nearly all of their electrical draw into heat, the dehumidifier adds more, and the plants release moisture that has to be removed. Once a facility outgrows tents and portable units, the cooling decision becomes a commercial HVAC decision, and it is easy to make it on the wrong numbers.

ModernFarms carries four Daikin 5-ton outdoor units: two air conditioners and two heat pumps, in 208/230V and 460V. This guide lays out what each one is, what separates them, and the arithmetic for how much cooling a lit room actually needs. We took the specs from the live listings, flagged where those listings are inconsistent, and left out anything we couldn't back up.

The Four Daikin Units

All four are scroll-compressor split-system outdoor units with a nominal capacity of 60,000 BTU/h, and all are listed as R32 and as arriving pre-charged for up to 15 feet of line set. The heat pump listings also name a time-delay defrost, a suction line accumulator, and a crankcase heater. The model numbers above come from the listings' own text and SKU fields.

Heat Pump or Air Conditioner?

The difference is direction. An air conditioner only removes heat from the room. A heat pump can also reverse and add heat, which matters in a facility that sees cold nights, lights-off periods in winter, or a dry-back stretch where the room would otherwise drop below target. The heat pump also carries the higher efficiency rating, 14.3 SEER2 against 13.4.

You pay for that flexibility. At 208/230V the heat pump costs $591 more than the air conditioner ($3,590 vs. $2,999), and at 460V it costs $1,165 more ($3,750 vs. $2,585). Per ton of nominal capacity, outdoor unit only, the four come to $517 (A/C, 460V), $600 (A/C, 208/230V), $718 (heat pump, 208/230V), and $750 (heat pump, 460V).

A note on the efficiency number. SEER2 measures total cooling output over a season divided by the electricity used, and it replaced the older SEER rating in January 2023 with a stricter test that accounts for ductwork resistance, as Carrier explains. It is a seasonal figure built around a typical building's year, not around a room that runs equipment around the clock. Treat it as a way to compare two units against each other, not as a prediction of your power bill.

The Cooling Math

Here is the arithmetic that sizes the problem. One watt of electrical load becomes about 3.412 BTU/h of heat, and one ton of cooling is 12,000 BTU/h. Lighting in a grow room converts essentially all of its electrical input to heat in the space, so the lights alone set a floor on your cooling load. The table uses 750 watts per fixture, the rating in the title of our Gavita Pro RS 2400e 750 Watt listing.

Read the table as a minimum, not a recommendation. A 5-ton unit's 60,000 BTU/h is a nominal rating at a standard test condition, and it covers both the temperature drop (sensible cooling) and the moisture removal (latent cooling). Real capacity falls as outdoor temperature rises, and the dehumidifier's own heat, fans, pumps, and a poorly insulated building all add to the load. So a room with sixteen fixtures sits near 3.4 tons from lighting alone, and one 5-ton unit is a reasonable starting point for it only after the rest of the load is counted. Our dehumidifier and AC sizing calculator takes you through that fuller load.

Why Cooling and Dehumidification Are One Decision

A compressor-based dehumidifier removes water but releases heat, so the more moisture you have to remove, the more cooling you need to offset it. A cooling unit also dehumidifies as a side effect, because cold coils condense moisture, but not in a way you can tune independently. That is why the pairing matters: the right dehumidifier lowers the latent load your air conditioner has to carry. Our dehumidifier buyer's guide covers sizing, and the VPD chart guide explains the temperature and humidity targets you are actually trying to hit. For smaller grows, how to cool a grow tent is the better starting point.

Voltage, Phase, and the Electrical Reality

Every one of these four units is three-phase. The two A/C units and the 208/230V heat pump run on 208/230V three-phase, and the other heat pump runs on 460V three-phase. If your facility has only single-phase service, none of them will run without a service change, which is a cost that never appears on a product page.

The one unit whose listing gives breaker data is the DC3SEA6030: a minimum breaker size of 21.3 amps and a maximum of 35 amps, at 208/230V three-phase. The other listings don't state electrical load figures, so get the nameplate data for the exact model before your electrician sizes the circuit. For the room-side circuits that feed your lights and dehumidifiers, read how many amps you can actually run.

What R32 Means for You

All four units use R32 refrigerant. R32 has a global warming potential of 675, against 2,088 for the R410A it replaces in much new equipment, and it is classed A2L, meaning mildly flammable, according to this R32 vs. R410A comparison. That classification is why the listings reference the UL 60335-2-40 standard for the unit design, and why installers need to follow current handling practice. For a buyer the practical points are that R32 is the direction new equipment is moving and that a licensed HVAC contractor should do the installation and charging work.

Placement and Service Notes From the Listings

Where the unit goes matters as much as which one you buy. The DC3SEA6030 listing gives its footprint as 38.25 inches high by 35.5 by 35.5, a weight of 301 pounds, and a sound level of 76 dBA, so plan for a pad or rack that carries that weight and for the noise near a property line or an occupied space. Across the other listings, the features named include scroll compressors with Copeland CoreSense diagnostics, sweat-connection service valves with easy-access gauge ports on the heat pumps, and an enclosed contactor. Those details help a technician service the unit, but they don't replace the manufacturer's installation manual, so have your contractor confirm clearances and line set lengths for the exact model.

You Still Need an Indoor Unit

These are outdoor units. The DC3SEA6030 listing says it is designed to pair with a compatible indoor unit, and a split system always needs a matching indoor coil or air handler. We list a Goodman 5 Ton R32 Multi-Position ECM Air Handler (AMST60DU1300) at $1,980.00, with field-installed electric heater kits available from 3 kW to 25 kW. Whether a given air handler matches a given outdoor unit is a compatibility question, so ask us to confirm the full system before you order rather than assuming a pairing.

Financing a Facility-Scale Cooling Project

Cooling is one of the larger line items in a facility build, and it often sits alongside dehumidification and lighting in the same project. ModernFarms finances projects over $25,000 for licensed facilities, and you can combine brands in one order. Rates, terms, credit requirements, and approval timing aren't published, so ask for them in writing. Our financing guide lists the equipment behind the program, and the financing page is where you start.

This article is general information, not engineering, electrical, financial, or legal advice. Cooling load depends on your room, equipment, and climate, and a licensed HVAC professional should size and install the system. Prices, stock, and specifications reflect ModernFarms' live catalog as of October 5, 2026. We don't upsell, and we'd rather you size the system correctly than buy the biggest unit.