King Electric

Smart Heating Solutions

Smart Heating Solutions

MODEL KFUH ECO2S®

Home » Products » Commercial Electric Heaters » Unit Heaters » MODEL KFUH ECO2S®

MODEL KFUH ECO2S®

high air velocity unit heater

The KFUH ECO2S® series high air velocity unit heater is an efficient, dependable unit heater perfectly suited for high ceiling applications such as warehouses, parking garages and docks.

Offering 2-stage energy-saving heat output (-2S Models Only) when paired with a 2-stage 24V thermostat (purchased separately).

The 5-speed, high-capacity motor and blower quietly delivers large volumes of air ranging from 708 to 2142 CFM minimum. With welded mounting channels on the unit, the heater may be mounted at any angle. Safety screens are provided at both the air intake and discharge aperture. The intake filter is replaceable.

Diffuser must be ordered separately. 24V Thermostat may be ordered separately.

  • Energy Efficient ECM Motor
  • 2-Stage Energy-Saving Heating (-2S Models Only) when paired with a 2-stage 24V thermostat (purchased separately)
  • Heavy Duty Open Coil Element
  • Dual Inlet Industrial Blower
  • Horizontal or Vertical Mount
  • Direct Drive Air Over Type Motor
  • Adjustable Louver Hood (sold separately)
  • Diffuser must be ordered separately.
  • Quiet Switching Relays
  • Replaceable Intake Filter
  • 24 Volt Control
  • Ductable On Intake & Outlet
  • Fan-Only Relay
  • 5 Speeds
  • Proudly Made in the USA with U.S. & Global Materials
  • cULus Certified for US & Canada
  • 5-Year Limited Warranty

Product Features

High Ceilings. No Problem.

Perfectly suited for high ceiling applications such as warehouses, parking garages and docks. The 5-speed, high-capacity motor and blower quietly delivers large volumes of air ranging from 775 to 1540 CFM minimum.

Now That’s Smart!

Mount At Any Angle

With welded mounting channels on the unit, the heater may be mounted at any angle. Safety screens are provided at both the air intake and discharge aperature. The intake filter is replaceable. Thermostat may be ordered separately.

Available Models

Ordering Information - Single Phase

MODELKWBTUHPHASEVOLTSAMPSSTAGE 1STAGE 2ELEMENTS**THERMOSTAT CONTROL VOLTAGEMOTOR HPCFM RANGETEMP. RISE RANGE (F)EFFECTIVE AIR THROW*SIZEWT. (lbs.)Purchase
KFUH2004-1-ECM 3.812,799120818.34 kW**N/A1241/3HP708 - 15368-1875ft.Fig. A57Buy Now
KFUH2005-1-ECM 517,0651208245 kW**N/A1241/3HP708 - 153610-2275ft.Fig. A57Buy Now
KFUH2008-1-2S1-ECM827,304120838.54.25 kW3.75 kW2241/3HP708 - 153616 - 3675ft.Fig. A57Buy Now
KFUH2010-1-2S1-ECM 1034,130120848.15 kW5 kW2241/3HP708 - 153621 - 4575ft.Fig. A65Buy Now
KFUH2012-1-2S1-ECM1240,956120857.77.5 kW4.5 kW3241/3HP708 - 153625 - 5475ft.Fig. A74Buy Now
KFUH2015-1-2S1-ECM 1551,195120872.110 kW 5 kW3241/3HP708 - 153631 - 6775ft.Fig. A74Buy Now
KFUH2018-1-2S1-ECM17.358,874120883.28.65 kW8.65 kW4241/3HP708 - 153635 - 7775ft.Fig. B74Buy Now
KFUH2020-1-2S1-ECM 2068,260120896.210 kW 10kW4241/2HP1258 - 177136- 5090ft.Fig. B76Buy Now
KFUH2025-1-2S1-ECM 2585,3251208120.215 kW10 kW5241/2HP1258 - 177145 - 6390ft.Fig. B81Buy Now
KFUH2030-1-2S1-ECM 30102,3901208144.220 kW10 kW6243/4HP1592 - 214244 - 60110ft.Fig. B85Buy Now
KFUH2404-1-ECM 413,6521240/208*16.7 / 14.4*4 kW**N/A1241/3HP708 - 15368-1875ft.Fig. A57Buy Now
KFUH2405-1-ECM 517,0651240/208*20.8 / 18*5 kW**N/A1241/3HP708 - 153610-2275ft.Fig. A57Buy Now
KFUH2408-1-2S1-ECM 827,3041240/208*33.3 / 28.8*4 kW 4 kW2241/3HP708 - 153616 - 3675ft.Fig. A57Buy Now
KFUH2410-1-2S1-ECM 1034,1301240/208*41.7 / 36.1*5kW5 kW2241/3HP708 - 153621 - 4575ft.Fig. A65Buy Now
KFUH2412-1-2S1-ECM 1240,9561240/208*50 / 43.3*5.75 kW5.75 kW2241/3HP708 - 153625 - 5475ft.Fig. A74Buy Now
KFUH2415-1-2S1-ECM 1551,1951240/208*62.5 / 54.1*10 kw 5 kW3241/3HP708 - 153631 - 6775ft.Fig. A74Buy Now
KFUH2418-1-2S1-ECM 17.358,8741240/208*72.1 / 62.4*11.5 kw5.75 kW3241/3HP708 - 153635 - 7775ft.Fig. A74Buy Now
KFUH2420-1-2S1-ECM 2068,2601240/208*83.3 / 72.1*10kw10 kW4241/2HP1258 - 177136- 5090ft.Fig. B76Buy Now
KFUH2425-1-2S1-ECM 2585,3251240/208*104.2 / 90.1*15 kW10 kW5241/2HP1258 - 177145 - 6390ft.Fig. B81Buy Now
KFUH2430-1-2S1-ECM 30102,3901240/208*125 / 108.2*20 kW10 kW6243/4HP1592 - 214244 - 60110ft.Fig. B85Buy Now
KFUH2435-1-2S1-ECM 34.5117,7491240/208*143.8 / 124.4*23 kW11.5 kW6243/4HP1592 - 214252 - 69110ft.Fig. B85Buy Now
KFUH4804-1-ECM 413,65214808.34 kW**N/A1241/3HP708 - 15368-18-75ft.Fig. A57Buy Now
KFUH4805-1-ECM 517,065148010.45 kW**N/A1241/3HP708 - 153610-2275ft.Fig. A57Buy Now
KFUH4808-1-2S1-ECM 827,304148016.74 kW4 kW2241/3HP708 - 153616 - 3675ft.Fig. A57Buy Now
KFUH4810-1-2S1-ECM 1034,130148020.85 kW5 kW2241/3HP708 - 153621 - 4575ft.Fig. A65Buy Now
KFUH4812-1-2S1-ECM 1240,9561480258 kW4 kW3241/3HP708 - 153625 - 5475ft.Fig. A74Buy Now
KFUH4815-1-2S1-ECM 1551,195148031.310 kW 5 kW3241/3HP708 - 153631 - 6775ft.Fig. A74Buy Now
KFUH4818-1-2S1-ECM 17.358,87414803611.5 kW5.75 kW3241/3HP708 - 153635 - 7775ft.Fig. A74Buy Now
KFUH4820-1-2S1-ECM2068,260148041.715 kW5 kW4241/2HP1258 - 177136- 5090ft.Fig. B76Buy Now
KFUH4825-1-2S1-ECM 2585,325148052.115 kW10 kW5241/2HP1258 - 177145 - 6390ft.Fig. B81Buy Now
KFUH4830-1-2S1-ECM 30102,390148062.520 kW10 kW6243/4HP1592 - 214244 - 60110ft.Fig. B85Buy Now
KFUH4835-1-2S1-ECM 34.5117,749148071.923 kW11.5 kW6243/4HP1592 - 214252 - 69110ft.Fig. B85Buy Now
* Dual rated heaters will draw 13% less amps and 25% less wattage when operated at 208V.
** Not Available In 2-Stage.

Ordering Information - Three Phase

MODELKWBTUHPHASEVOLTSAMPSSTAGE 1STAGE 2ELEMENTS**THERMOSTAT CONTROL VOLTAGEMOTOR HPCFM RANGETEMP. RISE RANGE (F)EFFECTIVE AIR THROW*SIZEWT. (lbs.)Purchase
KFUH2005-3-ECM 517,065320813.95 kW**N/A1241/3HP708 - 15368-1875ft.Fig. A57Buy Now
KFUH2008-3-2S3-ECM827,304320820.84 kW4 kW2241/3HP708 - 15368-1875ft.Fig. A57Buy Now
KFUH2010-3-2S3-ECM1034,130320827.75 kW5 kW2241/3HP708 - 15368-1875ft.Fig. A65Buy Now
KFUH2012-3-2S3-ECM 12.442,253320834.47.5 kW3.75 kW3241/3HP708 - 15368-1875ft.Fig. A74Buy Now
KFUH2015-3-2S3-ECM 1551,195320841.610 kW 5 kW3241/3HP708 - 15368-1875ft.Fig. A74Buy Now
KFUH2020-3-2S3-ECM 2068,260320855.515 kW5 kW4241/2 HP1258 - 177136- 5090ft.Fig. B76Buy Now
KFUH2025-3-2S3-ECM 2585,325320869.415 kW 10 kW5241/2 HP1258 - 177136- 5090ft.Fig. B81Buy Now
KFUH2030-3-2S3-ECM 30102,390320883.320 kW10 kW6243/4 HP1592 - 214244 - 60110ft.Fig. B85Buy Now
KFUH2040-3-2S3-ECM 40136,520320811120kW20 kW8242 x 1/2 HP2516 - 354236- 5090ft.Fig. C152Buy Now
KFUH2050-3-2S3-ECM 50170,6503208138.825 kW25 kW10242 x 1/2 HP2516 - 354236- 5090ft.Fig. C162Buy Now
KFUH2060-3-2S3-ECM 60204,7803208166.530 KW 30 kW12242 x 3/4 HP3184 - 428444 - 60110ft.Fig. C170Buy Now
KFUH2405-3-ECM 517,0653240/208*12 / 10.4*5 kW**N/A1241/3HP1258 - 177136- 5090ft.Fig. A57Buy Now
KFUH2410-3-2S3-ECM 1034,1303240/208*24 / 20.8*5 kW5 kW2241/3HP1258 - 177136- 5090ft.Fig. A65Buy Now
KFUH2412-3-2S3-ECM1240,9563240/208*28.9 / 25*6 kW6 kW3241/3HP1258 - 177136- 5090ft.Fig. A74Buy Now
KFUH2415-3-2S3-ECM 1551,1953240/208*36.1 / 31.2*10 kW 5 kW3241/3HP1258 - 177136- 5090ft.Fig. A74Buy Now
KFUH2418-3-ECM 17.358,8743240/208*41.6 / 36*17.25 kW**N/A3241/3HP1258 - 177136- 5090ft.Fig. A74Buy Now
KFUH2420-3-2S3-ECM 2068,2603240/208*48.1 / 41.6*10 kW 10 kW4241/2 HP1258 - 177136- 5090ft.Fig. B76Buy Now
KFUH2425-3-2S3-ECM2585,3253240/208*60.1 / 52*15 kW10 kW5241/2 HP1258 - 177136- 5090ft.Fig. B81Buy Now
KFUH2430-3-2S3-ECM 30102,3903240/208*72.2 / 62.5*20 kW10kW6243/4 HP1592 - 214244 - 60110ft.Fig. B85Buy Now
KFUH2435-3-2S3-ECM34.5117,7493240/208*83 / 71.8*17.25 kW17.25 kW6243/4 HP1592 - 214244 - 60110ft.Fig. B85Buy Now
KFUH2440-3-2S3-ECM 40136,5203240/208*96.2 / 83.3*20 kW20 kW8242 x 1/2 HP2516 - 354236- 5090ft.Fig. C152Buy Now
KFUH2450-3-2S3-ECM 50170,6503240/208*120.3 / 104*25 kW25 kW10242 x 1/2 HP2516 - 354236- 5090ft.Fig. C162Buy Now
KFUH2460-3-2S3-ECM 60204,7803240/208*144.3 / 124.9*30 KW 30 kW12242 x 3/4 HP3184 - 428444 - 60110ft.Fig. C170Buy Now
KFUH2470-3-2S3-ECM 70238,9103240/208*168.4 / 145.7*70 kW**N/A12242 x 3/4 HP3184 - 428444 - 60110ft.Fig. C170
KFUH4805-3-ECM 617,06534807.25 kW**N/A1241/3HP1258 - 177136- 5090ft.Fig. A57Buy Now
KFUH4810-3-2S3-ECM 1034,1303480125 kW5 kW2241/3HP1258 - 177136- 5090ft.Fig. A65Buy Now
KFUH4812-3-ECM 1240,956348014.412 kW**N/A3241/3HP1258 - 177136- 5090ft.Fig. A74Buy Now
KFUH4815-3-2S3-ECM 1551,19534801810 kW5 kW3241/3HP1258 - 177136- 5090ft.Fig. A74Buy Now
KFUH4818-3-ECM 1858,874348021.717.3 kW**N/A3241/3HP1258 - 177136- 5090ft.Fig. A74Buy Now
KFUH4820-3-2S3-ECM 2068,260348024.110 kW10 kW4241/2HP1258 - 177136- 5090ft.Fig. B76Buy Now
KFUH4825-3-2S3-ECM 2585,325348030.115 kW10 kW5241/2HP1258 - 177136- 5090ft.Fig. B81Buy Now
KFUH4830-3-2S3-ECM 30102,390348036.120 kW10 kW6243/4 HP1592 - 214244 - 60110ft.Fig. B85Buy Now
KFUH4835-3-2S3-ECM 34.5117,749348041.517.25 kW17.25 kW6243/4 HP1592 - 214244 - 60110ft.Fig. B85Buy Now
KFUH4840-3-2S3-ECM 40136,520348048.120 kW20 kW8242 x 1/2 HP2516 - 354236- 5090ft.Fig. C152Buy Now
KFUH4850-3-2S3-ECM 50170,650348060.125 kW 25 kW10242 x 1/2 HP2516 - 354236- 5090ft.Fig. C162Buy Now
KFUH4860-3-2S3-ECM 60204,780348072.230 KW 30 kW12242 x 3/4 HP3184 - 428444 - 60110ft.Fig. C170Buy Now
KFUH4870-3-2S3-ECM 70238,910348084.270 kW**N/A12242 x 3/4 HP3184 - 428444 - 60110ft.Fig. C170
* Dual rated heaters will draw 13% less amps and 25% less wattage when operated at 208V.
** Not Available In 2-Stage.

Ordering Information - Factory Installed Options

ADD SUFFIXDESCRIPTIONWEIGHT (lbs.)
-TFactory Installed 1-Stage Stat (SPST). Temperature range 40F to 100F (For 1-Stage Models Only)N/A
-2TSFactory Installed 2-Stage Stat (DPST). Temperature range 40F to 100F (For 2-Stage: -2S1 & -2S3 Models Only)N/A
-SFFactory Installed Summer Fan SwitchN/A
-DS32Factory Installed 32 Amp, 3-Pole Non-Fused Locking Disconnect SwitchN/A
-DS63Factory Installed 63 Amp, 3-Pole Non-Fused Locking Disconnect SwitchN/A
-DS80Factory Installed 80 Amp, 3-Pole Non-Fused Locking Disconnect SwitchN/A
-DS100Factory Installed 100 Amp, 3-Pole Non-Fused Locking Disconnect SwitchN/A
-3/4Sub 3/4 HP Motor for 20kW & 25kW Models OnlyN/A

Ordering Information - Accessories

MODELUPCDESCRIPTIONWEIGHT (lbs.)Purchase
KFUH-DIFFUSER15741Standard KFUH Air Diffuser5Buy Now
KFUH-RD15743Radial Diffuser for wide pattern heat dispersion4Buy Now
KFUH-90D15728Right angle elbow (90) diffuser with adjustable louvers15Buy Now
KFUH-90RD15729Right angle elbow (90) with radial diffuser14Buy Now
1F85U-22PR190542-Stage, 24V 7 Day Programmable Thermostat 44F-95F (For use with 2-stage heaters)1Buy Now
1F85U-22NP190442-Stage, 24V Non-Programmable Thermostat 44F-95F (For use with 2-stage heaters)1Buy Now
1E30N-910553791-Stage, 24V Thermostat Mercury Free-Vertical 45F-90F (For use with 1-stage heaters)1Buy Now

Engineering Specs

Contractor shall supply and install KFUH ECO2S Series high air velocity unit heaters manufactured by King Electrical Mfg. Company. Heaters shall be of the wattage and voltage as indicated on the plans.

Transformer: Each unit is equipped with a heavy duty low voltage (24 Volt) transformer for the thermostat control circuit.

Heating Elements: Quick heating, long life Ni-Chrome elements are sized to provide proper watt density for maximum heat dissipation by fan-forced air convection currents.

2-Stage Heating: 2-stage energy-saving heat output (-2S Models Only) when paired with a 2-stage 24V thermostat (purchased separately).

Terminal Block: For single strike field wiring.

Low Voltage Terminal Block: For 24 Volt control.

Air Filter: Convenient access for replacement of standard 16” x 20” x 1” filter.

Motor: Energy Saving, Long life, thermally protected, permanently lubricated, direct drive ECM motor (no belts to adjust or slip). This low noise, 5 speed motor is designated for use with air conditioning capability as well as heating. Very quiet operating. 60 second fan delay.

Overcurrent Protection: 208 & 240 volt KFUH Endura Pro models have 60 amp circuit breakers with single strike terminal block. 480 volt models have single
strike terminal block. Units over 48 amps have 60 amp fusing.

Limit Control: Integral automatic high temperature limit control in each heating element bank prevents the delivery of air at unsafe temperatures. 20-35 kW use a manual reset limit control to completely shut the unit heater off should over temperature occur.

Fan Relay: Heavy duty fan relay standard with summer fan operation.

Diffuser: Various styles available and must be ordered separately.

Approvals: cULus Certified for US & Canada