McCool Supply Mr Cool Professional
McCool SupplyMr Cool Professional · Texas
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Parts and accessories for the working contractor.

Field-install kits for MRCOOL ducted and commercial equipment: low ambient controls, propane conversions, duct transitions, TXV kits, GeoCool geothermal systems, water heaters and industrial HVLS fans. Call or text with the model number of the equipment you're working on and we'll confirm fit before anything ships.

Professional installation required. These parts involve refrigerant circuits, gas valves or ductwork. Refrigerant work requires EPA Section 608 certification, and gas conversions should be done by a licensed installer. Homeowners looking for DIY mini-split systems should use our Mr Cool DIY catalog.

Low Ambient Kits

Lets a condenser keep running in cooling mode when outdoor temperatures drop, for server rooms, kitchens and other spaces with a year-round cooling load. Cycles the condenser fan off head pressure.

Low ambient kit: pressure switch with blue wire harness and plug, brass flare tee, and two wire nuts
MLACK · confirm model #
Low Ambient Kit for MRCOOL Signature Series Condensers
Includes fan-cycling pressure switch with wire harness and plug-in connector, brass flare tee for the service port, and wire nuts.
Signature SeriesField installedEPA 608
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LP Kits

Natural gas to propane (LP) conversion kits for MRCOOL Signature Series furnaces and gas package units. Match the kit to the unit model and the job-site elevation.

LP conversion kit: burner orifices, gas valve spring, pressure switch and wire harness
MLP1SS
Propane Conversion Kit for Signature Series Single Stage Gas Furnace
Converts a natural gas Signature single-stage furnace to LP. Includes LP burner orifices, gas valve conversion spring, pressure switch and wire harness.
Signature SeriesSingle stage furnaceLicensed gas installer
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High altitude LP kit: orifices, spring, pressure switch, brass fitting and wire harness
MLP1SH
High Altitude Propane Conversion Kit for Signature Series Single Stage Gas Furnace
For high-altitude LP installations on Signature single-stage furnaces. Includes LP orifices, gas valve spring, pressure switch, brass adapter fitting and wire harness.
Signature SeriesHigh altitudeLicensed gas installer
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Package unit LP kit: brass orifices, pressure switch, brass adapter and wire harness
MLP1PSA
Propane Conversion Kit for Signature Series Gas Package Unit
Converts a Signature gas/electric package unit to LP. Includes LP burner orifices, pressure switch, brass adapter fitting and wire harness.
Signature SeriesPackage unitLicensed gas installer
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Square to Rounds

Converts the rectangular supply and return openings on a Signature Series package unit to 14 in. round duct. Pick horizontal (side discharge) or downflow (bottom discharge) and match the unit tonnage.

Signature package unit with square-to-round transitions installed on its side supply and return openings
M14HSR2436A · confirm model #
14 in. Square to Round Adapter Kit, Horizontal, 2 to 3 Ton
Pair of galvanized 14 in. square-to-round transitions (supply and return) that fasten to the side duct openings of the package unit.
Signature package unitHorizontal2–3 ton
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Signature package unit with square-to-round transitions installed on its side supply and return openings
M14HSR4260A
14 in. Square to Round Adapter Kit, Horizontal, 3.5 to 5 Ton
Pair of galvanized 14 in. square-to-round transitions (supply and return) that fasten to the side duct openings of the package unit.
Signature package unitHorizontal3.5–5 ton
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Two galvanized square-to-round duct transitions
M14DSR2436A
14 in. Square to Round Adapter Kit, Downflow, 2 to 3 Ton
Pair of galvanized 14 in. square-to-round transitions (supply and return) for the bottom duct openings when the package unit is set on a roof curb or downflow stand.
Signature package unitDownflow2–3 ton
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Two galvanized square-to-round duct transitions
M14DSR4260A
14 in. Square to Round Adapter Kit, Downflow, 3.5 to 5 Ton
Pair of galvanized 14 in. square-to-round transitions (supply and return) for the bottom duct openings when the package unit is set on a roof curb or downflow stand.
Signature package unitDownflow3.5–5 ton
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TXV Kits

Thermostatic expansion valve (TXV) kits for Signature Series indoor coils. Sized by system tonnage. Send the coil and condenser model numbers and we'll confirm the right kit.

TXV kit: brass expansion valve with sensing bulb and coiled equalizer tube, copper suction elbow, liquid line fitting, bulb clamp, screws and seals
H4TXV01
TXV Kit for Signature Series, 1.5 to 2.5 Ton
Field-installed thermostatic expansion valve kit. Includes TXV with sensing bulb and equalizer line, suction and liquid line fittings, bulb clamp, mounting hardware and seals. Brazing and refrigerant recovery required.
Signature Series1.5–2.5 tonR-410AEPA 608
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TXV kit: brass expansion valve with sensing bulb and coiled equalizer tube, copper fittings and hardware
H4TXV02
TXV Kit for Signature Series, 3 to 3.5 Ton
Field-installed thermostatic expansion valve kit. Includes TXV with sensing bulb and equalizer line, suction and liquid line fittings, bulb clamp, mounting hardware and seals. Brazing and refrigerant recovery required.
Signature Series3–3.5 tonR-410AEPA 608
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TXV kit: brass expansion valve with sensing bulb and coiled equalizer tube, copper fittings and hardware
H4TXV03
TXV Kit for Signature Series, 4 to 5 Ton
Field-installed thermostatic expansion valve kit. Includes TXV with sensing bulb and equalizer line, suction and liquid line fittings, bulb clamp, mounting hardware and seals. Brazing and refrigerant recovery required.
Signature Series4–5 tonR-410AEPA 608
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GeoCool Geothermal — DC Inverter Split System

GeoCool split system assembled: blower module stacked on the side return filter plenum, with the compressor module beside it

A modular water-source heat pump in three pieces: a compressor module that connects to the ground or water loop, a multi-position blower module, and a side return filter plenum. The pieces connect with short line sets, so they can be stacked upflow, laid horizontal or split between rooms. Ground loop design, drilling or trenching, loop flushing and refrigerant work are for qualified geothermal installers.

GeoCool compressor module with water connections and refrigerant service valves
GCSHPM048IN
GeoCool 4 Ton DC Inverter Compressor Module, Multi-Position
46,500 / 50,500 BTU. 230V single-phase. Connects to the ground or water loop and to the blower module.
4 tonDC inverter230V 1-phaseWater-source
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GeoCool compressor module with water connections and refrigerant service valves
GCSHPM060IN
GeoCool 5 Ton DC Inverter Compressor Module, Multi-Position
55,600 / 62,000 BTU. 230V single-phase. Connects to the ground or water loop and to the blower module.
5 tonDC inverter230V 1-phaseWater-source
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GeoCool blower module cabinet with refrigerant connections
GCSBLM013
GeoCool 4 Ton Split Blower Module, Multi-Position
Up to 1,300 CFM. Installs vertical, horizontal or as a split system. Pairs with GCSHPM048IN.
4 ton1,300 CFMMulti-position
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GeoCool blower module cabinet with refrigerant connections
GCSBLM014
GeoCool 5 Ton Split Blower Module, Multi-Position
Up to 1,400 CFM. Installs vertical, horizontal or as a split system. Pairs with GCSHPM060IN.
5 ton1,400 CFMMulti-position
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GeoCool side return filter plenum with side opening, top opening and front filter slot
GCSAR048060
GeoCool Side Return Filter Plenum, 4 to 5 Ton
Return air plenum with openings on the side and top. The filter slides out through a slot on the front for easy changes. Sits under the blower module in an upflow stack.
4–5 tonSide returnSlide-out filter
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Three lengths of insulated GeoCool connecting line sets with fittings
Model # TBD · confirm model #s
GeoCool Connecting Line Sets
Pre-insulated line sets with fittings that connect the compressor module to the blower module. Several lengths.
Compressor to blower
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Water Heaters

MRCOOL HeatWise electric tank water heaters and gas tankless water heaters. Installation involves water piping, 240V wiring or gas lines and venting, so it calls for advanced skills or a licensed plumber and electrician. Check local code and permit requirements.

MRCOOL HeatWise 28 gallon lowboy electric tank water heater
MTWH04528EL
HeatWise™ 28 Gallon Electric Tank Water Heater, Lowboy
4,500 W elements. Short tank for crawl spaces, under-counter spots and low ceilings. Needs a dedicated 240V circuit.
28 galLowboy4.5 kW electricLicensed plumber & electrician
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MRCOOL HeatWise 38 gallon lowboy electric tank water heater
MTWH04538EL
HeatWise™ 38 Gallon Electric Tank Water Heater, Lowboy
4,500 W elements. Short tank for crawl spaces and low ceilings. Needs a dedicated 240V circuit.
38 galLowboy4.5 kW electricLicensed plumber & electrician
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MRCOOL HeatWise 30 gallon standard electric tank water heater
MTWH04530E
HeatWise™ 30 Gallon Electric Tank Water Heater, Standard
4,500 W elements. Compact size for apartments, small homes and point-of-use. Needs a dedicated 240V circuit.
30 galStandard4.5 kW electricLicensed plumber & electrician
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MRCOOL HeatWise 40 gallon standard electric tank water heater
MTWH04540E
HeatWise™ 40 Gallon Electric Tank Water Heater, Standard
4,500 W elements. Common size for 2 to 3 person households. Needs a dedicated 240V circuit.
40 galStandard4.5 kW electricLicensed plumber & electrician
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MRCOOL HeatWise 40 gallon tall electric tank water heater
MTWH04540ET
HeatWise™ 40 Gallon Electric Tank Water Heater, Tall
4,500 W elements. Narrow, tall tank for closets with a small footprint. Needs a dedicated 240V circuit.
40 galTall4.5 kW electricLicensed plumber & electrician
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MRCOOL HeatWise 50 gallon standard electric tank water heater
MTWH04550E
HeatWise™ 50 Gallon Electric Tank Water Heater, Standard
4,500 W elements. Common size for 3 to 5 person households. Needs a dedicated 240V circuit.
50 galStandard4.5 kW electricLicensed plumber & electrician
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MRCOOL HeatWise 50 gallon tall electric tank water heater
MTWH04550ET
HeatWise™ 50 Gallon Electric Tank Water Heater, Tall
4,500 W elements. Narrow, tall tank for closets with a small footprint. Needs a dedicated 240V circuit.
50 galTall4.5 kW electricLicensed plumber & electrician
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MRCOOL white wall-mounted tankless gas water heater with vent connections on top
MHWH199NCNU
Tankless Gas Water Heater, Natural Gas
Endless hot water for homes with up to four bathrooms. Wall-mounted, with digital temperature control. 15-year heat exchanger warranty.
Natural gasTanklessLicensed plumber / gas fitter
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MRCOOL white wall-mounted tankless gas water heater with vent connections on top
MHWH199NCLU
Tankless Gas Water Heater, Liquid Propane
Same unit set up for propane. Up to four bathrooms. 15-year heat exchanger warranty.
Liquid propaneTanklessLicensed plumber / gas fitter
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Industrial HVLS Fans

CoolBlade high-volume, low-speed ceiling fans for warehouses, shops, gyms and barns. Hardwired 240V single-phase with a direct-drive motor. Needs a qualified electrician and a structural check of the mounting point: the fan weighs about 250 lb.

CoolBlade 16 foot five-blade HVLS fan seen from below
MCFAN16PBGR
CoolBlade 16 ft Industrial HVLS Fan, 5-Blade, Gray
Up to 10,000 CFM and about 1,640 sq ft of coverage at 80 RPM. Reinforced magnesium alloy blades, permanent-magnet direct-drive motor, 38 dB(A).
16 ft diameter5 blades240V 1-phase~249 lb
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CoolBlade 24 foot six-blade HVLS fan seen from below
MCFAN24XBGR
CoolBlade 24 ft Industrial HVLS Fan, 6-Blade, Gray
Covers up to about 5,577 sq ft. Reinforced magnesium alloy blades, permanent-magnet direct-drive motor, 38 dB(A).
24 ft diameter6 blades220–240V 1-phase
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