HAZLOC Heater Systems

Manufacturer of Industrial Unit Heaters for hazardous and severe-duty locations

CRG Boiler Systems also offers the HAZLOC heaters configurations for rugged conditions and inclement weather locations. The HAZLOC line of heating applications delivers climate control solutions through heating systems for asset protection solutions and improved work environment conditions. CRG regards the HAZLOC line of heating applications as a "Tier One" product selection for meeting industry demands in the most of uncompromising elements.

HUH Hydronic Unit Heater

The HUH series of heat-exchanger unit heaters is designed for rugged industrial applications in steam, hot water, glycol or other fluid circulating heating systems. The HUH series is designed for pressures and temperatures up to 400 psi and 550 °F respectively in single-pass and multi-pass core configurations with multi-pass units greatly improving performance characteristics when used with liquids. HUH heaters meet ASME requirements with a CRN.

Literature

Download the HUH Brochure


Download PDF

HUH Data Section

Introduction

The Hydronic Unit Heater (HUH) series of heatexchanger unit heaters were specifically designed to meet the demanding requirements of the oil & gas industry. The operating conditions of this industry require heating equipment that is safe, reliable, dependable, and available when you need it. The rugged design features of the HUH series also makes it ideal for use in other heavy-duty industries that include pulp & paper, power generation, mining, steel mills, foundries, water and wastewater treatment plants, chemical plants, and hazardous material storage facilities.

Designed for operating pressures up to 400 PSIG (2758 kPa)!

All All Hazloc Heaters™ HUH models are designed to ASME requirements for applications with maximum operating pressures up to 400 PSIG (2758 kPa). The five sizes of HUH heaters are available in both single-pass and multi-pass configurations providing you with 16 model choices to meet your specific requirements.

HUH heaters are suitable for a wide variety of heating fluids and are perfect for steam, hot water, or glycol applications. They are also used with other non-lethal or non-poisonous fl uids (as defi ned by ASME) for both space heating and liquid cooling applications that include but are not limited to hot-oil heaters, lube-oil coolers, product process coolers, pumpseal coolers, etc.

Rugged design, but easily maintained!

All HUH heaters are designed for industrial applications with all features being heavy-duty to meet your most demanding environments and long-life expectations. Even with heavy-gauge steel construction used throughout the heater it does not inhibit the easy maintenance of the product, since all parts are easily removed. Furthermore, the heater core can be removed without disturbing the heater mounting arrangement or electrical connections.

Interchangeable with other brands of heaters!

Hazloc Heaters™ HUH series are designed with cabinet dimensions and mounting holes equivalent to a major competitor’s heaters making them easily interchangeable. Furthermore, our rugged and superior HUH replacement cores are also designed to slide into equivalent sizes of their heaters. An added benefit is our 18-month heater warranty!

Maximum durability… rugged fin tubes and headers!

All HUH heat-exchanger cores are constructed using rugged 16-gauge (0.065 in.) carbon-steel tubes with tension-wound aluminum fins and carbon steel headers for maximum durability, resistance to corrosion, and longer life in your demanding applications.

Thermal Performance Analysis Software

Take advantage of our HTFS™ ACOL thermal performance analysis software!

If your input conditions or fluid type are not listed in pages 6 through 10, then please contact us for assistance on calculating heating capacities for all sizes of Hazloc Heaters™ HUH heat-exchanger unit heaters. Our ACOL thermal software service computes performance parameters under a diverse range of operating conditions.
Hazloc Heaters™ ACOL
thermal performance analysis software is capable of rating heaters for steam, or for fluids based on either the flow-rate or temperature-drop sizing methods. Our software is also pre-programmed with the following fluid types for quick and easy analysis.

Steam
Water
Ethylene Glycol/Water
Diethylene Glycol/Water
Therminol 66

Triethylene Glycol/Water
Dowtherm A
Dowtherm G
and others...

Just provide us with the following input data!

• Type of fluid used
• Operating pressure
• Inlet fluid temperature
(liquid applications only)

• Outlet fluid temperature, or available fluid flow rate
• Altitude above sea level (ASL)
• Entering air temperature

If your fluid isn’t listed above, we can still help!

We can also provide you with performance characteristics on other fl uids not listed above by manually inputting the following fl uid physical properties: Temperature, Density, Specific Heat, Thermal Conductivity, and Viscosity at two reference points.

This brochure was produced using Imperial units of measure. If required we can provide you with data in Metric units.

Model Coding

• * Other voltages available upon request. Longer lead times may apply. Contact factory.
configuration only due to SafeDeformTM design.
• Motors are designed to be operated at rated voltage with tolerances of ± 15%.
• If ordering explosion-proof motor, ensure equipment meets
the requirements of your hazardous area rating.

HUH Physical Dimensions

Heater
Size
12 16 20 24 30
Dim.
Inches
Inches
Inches
Inches
Inches
(mm) (mm) (mm) (mm) (mm)
A 12.6 15.5 19.49 23.46 29.53
(320) (394) (495) (596) (750)
B 4.02 4.02 4.02 4.65 5.71
(102) (102) (102) (118) (145)
C 1.85 2.38 2.4 2.4 2.4
(47) (60.5) (61) (61) (61)
D 16.3 20.28 24.29 28.27 34.33
(414) (515) (617) (718) (872)
E 9.76 9.76 10.51 11.81 13.78
(248) (248) (267) (300) (350)
F 6.77 5.77 5.75 6.69 7.48
(172) (146.5) (146) (170) (190)
G (2 holes) 1.75 2.5 2.76 3.15
(44.5) (63.5) (70) (80)
H 2.64 2.64 3.62 4.29 4.37
(67) (67) (92) (109) (111)
J 11.02 15 17 19.69 25.59
(280) (381) (432) (500) (650)
K 1.38 1.38 1.38 1.38 1.38
(35) (35) (35) (35) (35)
L 21.65 21.65 22.83 24.21 27.36
(550) (550) (580) (615) (695)
Specifications by Model Size & How to Order

HUH Specifications By Model Size

Model   HUH1-12 HUH1-16 HUH1-20 HUH1-24 HUH1-30
Fan diameter   in. (mm) 12 (304.8) 16 (406.4) 20 (508.0) 24 (609.6) 30 (762.0)
Air delivery*   cfm (m3/hr) 1090 (1852) 1650 (2803) 3000 (5097) 3800 (6456) 5500 (9344)
Approx. air velocity*   fpm (m/s) 1305 (6.6) 1111 (5.6) 1309 (6.6) 1138 (5.8) 1066 (5.4)
Air throw* @ 15 psi steam      ft (m) 45 (13.7) 65 (19.8) 70 (21.3) 80 (24.4) 85 (25.9)
Motor power   hp (watts) ¼ (186) or ⅓ (248) ½ (373) ½ (373) 1 (746)
Rec. min. mounting height   ft (m) 7.5 (2.3) 7.5 (2.3) 7.5 (2.3) 7.5 (2.3) 7.5 (2.3)
Net weight lbs (kg) 78 (35.4) 97 (44.0) 132 (59.9) 206 (93.4) 264 (119.7)
Approx. shipping weight lbs (kg) 138 (62.6) 157 (71.2) 207 (93.9) 281 (127.4) 354 (160.6)
* At 70°F (21°C), 60 Hz and sea level.

HUH General Specifications

Approval CRN: 0H6665.2 - steam or fluids (not for use with lethal  fluids as defined by ASME, Section VIII, Div. 1, A03, UW-2).
Maximum pressure rating 400 psig (2758 kPa).
Maximum temperature rating 550 °F (288°C).
Cabinet material 14-gauge (0.075 in.) (1.9 mm) steel. Yellow epoxy/polyester powder coated with five-stage pretreatment, including iron phosphate.
Louver blades Anodized extruded aluminum.
Fan Multi-blade aluminum, steel spider and hub with 5/8 in. bore.
Fan guard Split design with close wire spacing. A 3/8 in. (9.5 mm) diameter probe will not enter.
Motor type Thermally protected CSA or UL Listed 1725 RPM permanently lubricated ball bearing type with 56 frame. See page 4 for ordering requirements.
Mounting holes 5/8 in. - 11 UNC – 4 holes at top of heater (2 holes, HUH1-12).
Fluid connections 2 in. NPT female inlet and outlet.
Header material Carbon steel conforming to ASME requirements.
Finned tubes 5/8 in. (15.9 mm) outside diameter [16-gauge, 0.065 in. (1.6 mm) wall thickness] carbon steel tubes with 1-1/2 in. (38.1 mm) outside diameter copper-free, L-foot, tension-wound aluminum fins @ 10 fins per in.
How to Order

When ordering please follow the “Model Code Sequence Required for Ordering” format in Model Coding to specify base model, motor voltage, phase, frequency and motor enclosure type. If ordering explosion-proof motors also specify motor hazardous location area rating required.


Example Model Code: HUH1-16-C-1-A-230160-E (suitable for Class I, Div.1, Group D, T3B)

Nomenclature

• 103 – 1000
• BTU – British Thermal Unit
• Cond. – Condensate Flow Rate
• EAT – Entering Air Temperature
• ΔT – Fluid Temperature Drop

• FAT – Final Air Temperature
• PSIG – Pounds Per Square Inch Gauge Pressure
• CFM – Cubic Feet Per Minute
• USGPM – U.S. Gallons Per Minute
• ΔP – Fluid Pressure Drop

Accessories and Mounting Brackets
Accessories – Mounting Brackets

WMB*
Wall Mounting Bracket For use in buildings that have substantial walls. The Z sections provide additional support where necessary.

BMB*
Basic Mounting Bracket For applications where the support arm can be bolted or welded directly to structural steel or concrete.

PMB*
Pipe Mounting Bracket
For buildings with insufficient strength to use other types of mounting brackets. Requires 3 in. pipe (3.5 in. O.D., min. Sch. 40, not supplied).

HMB
Hanging Mounting Bracket
Ideal and economical if adequate overhead structure exists. Requires 1/2 in. pipe, cut and threaded (min. Sch. 40 not supplied).

Note:
When ordering mounting brackets, please specify the type of bracket preferred and the basic model code of the heater to be mounted. Example, PMB-SRH1-16. Mounting kits are made of steel with a black enamel paint finish. Structural support of heater and bracket during transit is required.


Thermostats

ET5STS (SPST)
Line-Voltage Thermostat 22 Amps Resistive Load, 277 VAC Max 3/4 HP@125 VAC; 1-1/2 HP@ 250/277 VAC Ship wt - 0.6 lbs (0.28 kg)

TBX1 (SPDT)
Explosion-proof Thermostat -
Class I, Groups C&D, Class II, Groups E, F & G
Temperature range: 40°F to 80°F (5°C to 27°C),
3/4” - NPT conduit opening on top and bottom.
22 Amps Resistive Load, 277 VAC Max; 3/4 HP@125 VAC;
1-1/2 HP@ 250/277 VAC
Overall dimensions - 6.4 in (16.2 cm) W x 5.6 in (14.3 cm) H x 4.4 in (11.1 cm) D
Ship wt - 5.3 lbs (2.4 kg)
* Not suitable for model HUH1-30

Steam Performance Tables

HUH1-12 @60 Hz Entering Air Temperature
PSIG
°F
Performance
-10 0 10 20 30 40 50 60 70
2 219 Output (103 btu/hr)
71 67 63 60 56 53 50 46 43
Cond. (lbs/hr)
73 69 66 62 58 55 51 48 45
FAT (°F)
40.9 49.4 57.7 66.1 74.3 82.5 90.6 98.6 106.7
50 298 Output (103 btu/hr)
95 92 88 84 81 77 73 70 66
Cond. (lbs/hr)
104 100 96 92 88 84 80 77 73
FAT (°F)
58.8 67.5 76.2 84.7 93.2 101.6 109.9 118.2 126.4
100 338 Output (103 btu/hr)
108 105 101 97 93 89 86 82 79
Cond. (lbs/hr)
123 118 114 110 105 101 97 93 89
FAT (°F)
68.1 76.9 85.7 94.4 103.0 111.6 120.0 128.4 136.7
150 366 Output (103 btu/hr)
117 113 109 105 101 98 94 90 87
Cond. (lbs/hr)
136 131 127 122 118 114 109 105 101
FAT (°F)
74.3 83.2 92.1 100.9 109.6 118.2 126.8 135.3 143.7
200 387 Output (103 btu/hr)
124 120 116 112 108 104 101 97 93
Cond. (lbs/hr)
147 142 138 133 129 124 120 115 111
FAT (°F)
79.1 88.1 97.0 105.9 114.7 123.4 132.0 140.6 149.1
300 421 Output (103 btu/hr)
134 130 126 122 118 114 110 107 103
Cond. (lbs/hr)
166 161 156 151 146 141 137 132 128
FAT (°F)
86.5 95.6 104.6 113.6 122.5 131.3 140.0 148.7 157.3
If using 50 Hz power supply, derate output values by 6%. Above figures are based on calculations at sea level.
Steam Performance Tables
HUH1-16 @60 Hz Entering Air Temperature
PSIG °F Performance -10 0 10 20 30 40 50 60 70
2 219 Output (103 btu/hr) 112 106 101 95 89 84 79 74 69
Cond. (lbs/hr) 116 110 104 98 92 87 82 76 71
FAT (°F) 43.4 51.8 60.1 68.3 76.4 84.5 92.6 100.5 108.4
50 298 Output (103 btu/hr) 152 146 140 134 128 122 117 111 106
Cond. (lbs/hr) 166 160 153 146 140 134 128 122 116
FAT (°F) 62.4 71.0 79.5 88.0 96.4 104.7 112.9 121.1 129.2
100 338 Output (103 btu/hr) 173 166 160 154 148 142 136 130 125
Cond. (lbs/hr) 195 188 181 174 168 161 154 148 141
FAT (°F) 72.2 81.0 89.6 98.2 106.7 115.1 123.5 131.8 140.0
150 366 Output (103 btu/hr) 186 180 174 168 161 155 150 144 138
Cond. (lbs/hr) 217 209 202 195 188 181 174 167 160
FAT (°F) 78.8 87.6 96.4 105.1 113.7 122.2 130.6 139.0 147.3
200 387 Output (103 btu/hr) 197 191 184 178 172 166 160 154 148
Cond. (lbs/hr) 235 227 219 212 205 197 190 183 176
FAT (°F) 83.9 92.8 101.6 110.4 119.1 127.7 136.2 144.7 153.1
300 421 Output (103 btu/hr) 214 207 201 194 188 182 176 170 164
Cond. (lbs/hr) 265 256 248 241 233 225 218 210 203
FAT (°F) 91.7 100.7 109.7 118.6 127.3 136.1 144.7 153.3 161.8
If using 50 Hz power supply, derate output values by 6%. Above figures are based on calculations at sea level.
HUH1-20 @60 Hz Entering Air Temperature
PSIG °F Performance -10 0 10 20 30 40 50 60 70
2 219 Output (103 btu/hr) 190 180 170 161 151 142 133 125 116
Cond. (lbs/hr) 196 186 176 166 157 147 138 129 120
FAT (°F) 39.8 48.1 56.5 64.9 73.2 81.4 89.6 97.7 105.8
50 298 Output (103 btu/hr) 260 250 239 229 220 210 200 191 181
Cond. (lbs/hr) 285 274 262 251 240 230 219 209 198
FAT (°F) 58.2 66.9 75.5 84.1 92.6 101.0 109.3 117.7 125.9
100 338 Output (103 btu/hr) 296 285 274 264 254 243 234 224 214
Cond. (lbs/hr) 335 323 311 299 287 276 265 254 243
FAT (°F) 67.4 76.3 85.0 93.7 102.3 110.8 119.3 127.7 136.0
150 366 Output (103 btu/hr) 319 308 297 287 276 266 256 246 237
Cond. (lbs/hr) 371 359 346 334 322 310 298 287 275
FAT (°F) 73.6 82.5 91.4 100.2 108.9 117.5 126.0 134.5 142.9
200 387 Output (103 btu/hr) 337 326 316 305 295 284 274 264 254
Cond. (lbs/hr) 402 389 376 363 351 338 326 314 302
FAT (°F) 78.4 87.4 96.3 105.2 113.9 122.3 131.3 139.8 148.3
300 421 Output (103 btu/hr) 366 354 343 332 322 311 301 291 281
Cond. (lbs/hr) 453 439 425 412 399 386 373 360 348
FAT (°F) 85.7 94.8 103.9 112.8 121.7 130.5 139.2 147.9 156.5
If using 50 Hz power supply, derate output values by 6%. Above figures are based on calculations at sea level.
Steam Performance Tables (Continued)
HUH1-24 @60 Hz Entering Air Temperature
PSIG °F Performance -10 0 10 20 30 40 50 60 70
2 219 Output (103 btu/hr) 388 367 347 327 308 289 270 252 234
Cond. (lbs/hr) 400 379 358 338 318 298 279 260 241
FAT (°F) 70.1 77.5 84.8 92.1 99.2 106.2 113.2 120.1 126.8
50 298 Output (103 btu/hr) 540 518 495 474 452 431 410 390 370
Cond. (lbs/hr) 591 566 542 518 495 472 449 427 405
FAT (°F) 101.7 109.4 116.9 124.4 131.7 138.9 146.1 153.1 160.1
100 338 Output (103 btu/hr) 614 591 568 545 523 501 480 459 439
Cond. (lbs/hr) 696 669 643 618 593 568 544 520 497
FAT (°F) 117.1 124.9 132.7 140.3 147.8 155.1 162.4 169.6 176.7
150 366 Output (103 btu/hr) 665 641 618 594 572 550 528 506 486
Cond. (lbs/hr) 773 745 718 691 665 639 614 589 565
FAT (°F) 127.4 135.4 143.2 151.0 158.5 166.1 173.5 180.8 188.0
200 387 Output (103 btu/hr) 703 679 656 632 609 587 565 543 522
Cond. (lbs/hr) 838 809 781 753 725 699 672 647 621
FAT (°F) 135.5 143.6 151.5 159.3 167.0 174.7 182.2 189.5 196.8
300 421 Output (103 btu/hr) 763 739 714 691 667 644 622 600 578
Cond. (lbs/hr) 956 915 885 855 826 798 770 743 716
FAT (°F) 147.8 156.0 164.1 172.1 180.0 187.8 195.4 203.0 210.4
If using 50 Hz power supply, derate output values by 6%. Above figures are based on calculations at sea level.
HUH1-30 @60 Hz Entering Air Temperature
PSIG °F Performance -10 0 10 20 30 40 50 60 70
2 219 Output (103 btu/hr) 601 569 537 506 475 446 417 388 360
Cond. (lbs/hr) 621 587 554 522 491 461 431 401 372
FAT (°F) 75.8 83.0 90.0 97.0 103.9 110.7 117.4 124.0 130.5
50 298 Output (103 btu/hr) 818 783 749 715 683 650 619 589 559
Cond.(lbs/hr) 894 856 819 782 747 712 677 644 611
FAT (°F) 106.7 114.2 121.6 128.9 136.1 143.2 150.2 157.1 163.9
100 338 Output (103 btu/hr) 930 894 859 824 790 757 725 693 661
Cond.(lbs/hr) 1,054 1,013 973 933 895 857 821 785 749
FAT (°F) 122.9 130.6 138.1 145.5 152.9 160.1 167.2 174.2 181.2
150 366 Output (103 btu/hr) 1,007 970 934 899 864 830 797 765 732
Cond.(lbs/hr) 1,171 1,128 1,086 1,045 1,005 966 927 889 852
FAT (°F) 133.7 141.5 149.2 156.8 164.3 171.6 178.8 185.9 193.0
200 387 Output (103 btu/hr) 1,066 1,029 992 956 921 887 854 820 787
Cond.(lbs/hr) 1,269 1,224 1,181 1,138 1,097 1,056 1,016 976 938
FAT (°F) 142.2 150.1 157.9 165.6 173.2 180.6 187.9 195.1 202.3
300 421 Output (103 btu/hr) 1,156 1,119 1,081 1,045 1,009 974 939 905 872
Cond.(lbs/hr) 1,433 1,385 1,339 1,294 1,250 1,207 1,164 1,122 1,081
FAT (°F) 155.1 163.1 171.1 179.0 186.7 194.4 201.9 209.3 216.6
If using 50 Hz power supply, derate output values by 6%. Above figures are based on calculations at sea level.
Glycol Performance Tables - 50% Ethylene Glycol†, 60°F EAT @ 60 Hz
  Entering Glycol Tempertaure
180°F
200°F
220°F
240°F
Model
∆T
°F
Output
103 Btu/Hr
FLOW USGPM
FAT
°F
∆P
PSI
Output
103 Btu/Hr
FLOW USGPM
FAT
°F
∆P PSI
Output
103 Btu/Hr
FLOW USGPM
FAT
°F
∆P PSI
Output
103 Btu/Hr
FLOW USGPM
FAT
°F
∆P PSI
HUH1-12-C-1*
10 12 2.93 70.2 0.01 15 3.63 72.8 0.01 19 4.47 76.0 0.01 27 6.22 82.5 0.01
20 11 1.31 69.1 0.00 14 1.64 71.6 0.00 17 2.00 74.3 0.00 21 2.38 77.2 0.00
40 9 0.54 67.6 0.00 12 0.70 69.9 0.00 15 0.88 72.5 0.00 18 1.06 75.2 0.00
HUH1-12-C-3 10 24 5.71 79.9 0.26 31 7.40 86.1 0.41 39 9.05 92.3 0.60 46 10.7 98.4 0.81
20 12 1.43 70 0.02 19 2.22 75.5 0.04 27 3.10 82.0 0.08 34 3.97 88.5 0.12
40 10 0.57 67.9 0.00 13 0.74 70.4 0.01 16 0.92 73.0 0.01 19 1.11 75.8 0.01
HUH1-16-C-1* 10 20 4.81 71.1 0.01 29 6.75 75.8 0.01 41 9.56 82.6 0.02 54 12.3 89.5 0.03
20 18 2.15 69.9 0.04 23 2.71 72.6 0.00 28 3.29 75.5 0.01 34 3.87 78.5 0.01
40 15 0.90 68.3 0.00 20 1.17 70.8 0.00 25 1.44 73.6 0.00 30 1.72 76.4 0.00
HUH1-16-C-3 10 42 10.1 83.3 0.49 54 12.7 89.7 0.74 65 15.2 96.0 1.04 77 17.6 102.3 1.38
20 26 3.05 74.0 0.05 38 4.43 80.7 0.10 50 5.84 87.3 0.17 62 7.11 94.0 0.24
40 16 0.95 68.7 0.01 21 1.23 71.3 0.01 26 1.51 74.2 0.02 33 1.90 77.9 0.02
HUH1-16-C-5 10 48 11.5 86.7 2.85 60 14.0 92.9 4.12 71 16.4 99.0 5.58 82 18.8 105.2 7.24
20 36 4.35 80.1 0.45 48 5.66 86.6 0.73 60 6.95 93.0 1.07 71 8.20 99.4 1.46
40 17 1.00 69.3 0.03 25 1.47 73.9 0.06 38 2.23 81.2 0.13 50 2.91 88.0 0.21
HUH1-20-C-1* 10 43 10.1 72.9 0.02 64 14.9 79.2 0.03 85 19.7 85.6 0.05 106 24.2 91.9 0.08
20 30 3.57 69.1 0.00 38 4.49 71.5 0.00 47 5.47 74.2 0.00 57 6.53 77.1 0.01
40 25 1.49 67.5 0.00 33 1.94 69.9 0.00 41 2.40 72.4 0.00 50 2.90 75.2 0.00
HUH1-20-C-3 10 79 18.7 83.8 1.20 98 23.1 89.7 1.78 118 27.3 95.5 2.4 137 31.5 101.4 3.13
20 54 6.49 76.4 0.17 75 8.80 82.5 0.29 95 87.8 11.2 0.44 115 13.3 94.8 0.60
40 26 1.58 67.9 0.14 35 2.07 70.5 0.02 52 3.02 75.5 0.04 73 4.22 82.0 0.07
HUH1-20-C-5 10 87 20.7 86.3 6.28 106 24.9 92.1 8.90 125 29.1 97.8 11.9 144 33.1 103.5 15.23
20 70 8.29 80.9 1.12 89 10.5 86.9 1.72 109 12.7 92.8 2.43 129 14.8 98.8 3.23
40 31 1.88 69.3 0.08 57 3.36 77.0 0.21 77 4.54 83.2 0.35 98 5.69 89.5 0.53
HUH1-24-C-1* 10 110 26.1 86.2 0.09 152 35.7 96.2 0.12 194 45.1 106.3 0.14 236 54.2 116.3 0.18
20 65 7.75 75.5 0.06 83 9.73 79.7 0.06 107 12.6 85.7 0.07 152 17.5 96.4 0.07
40 54 3.24 72.9 0.06 71 4.20 76.9 0.06 89 5.22 81.3 0.06 108 6.28 85.9 0.06
HUH1-24-C-3 10 170 40.4 100.6 2.09 209 49.2 110.0 2.85 249 57.8 119.3 3.73 288 66.1 128.7 4.70
20 128 15.3 90.5 0.60 169 19.9 100.3 0.78 210 24.5 110.1 0.99 251 28.9 119.8 1.23
40 57 3.44 73.7 0.33 82 4.86 79.5 0.35 134 7.86 91.9 0.40 177 10.3 102.3 0.45
HUH1-24-C-5 10 186 44.3 99.6 9.97 226 53.1 107.9 13.9 ∆P > 15 PSI, use a 3 pass model
∆P > 15 PSI, use a 3 pass model
20 155 18.4 92.7 1.90 195 23.0 101.3 2.84 236 27.4 109.9 3.91 276 31.8 118.5 5.12
40 92 5.52 79.2 0.21 135 8.03 88.4 0.41 178 97.4 97.4 0.64 221 12.8 106.4 0.91
HUH1-24-C-7 10 ∆P > 15 PSI, use a 5 pass model
∆P > 15 PSI, use a 5 pass model
∆P > 15 PSI, use a 3 pass model
∆P > 15 PSI, use a 3 pass model
20 167 19.9 95.3 5.5 207 24.4 103.8 8.02 247 28.8 112.3 10.9 287 33.0 120.7 14.0
40 116 6.92 84.1 0.79 107 4.24 82.0 0.32 199 11.7 101.8 1.97 240 13.9 110.6 2.72
HUH1-30-C-1* 10 195 46.5 92.2 0.42 257 60.5 102.4 0.47 319 74.1 112.6 0.52 380 87.3 122.7 0.58
20 101 12.1 76.7 0.35 144 16.9 83.7 0.36 214 25.0 95.4 0.38 280 32.2 106.1 0.39
40 85 5.08 74.0 0.35 111 6.56 78.3 0.35 139 8.13 82.9 0.35 168 9.74 87.7 0.36
HUH1-30-C-3 10 267 63.4 104.0 3.64 325 76.4 113.6 4.90 383 89.0 123.2 6.32 441 101.3 132.8 7.84
20 214 25.5 95.3 1.07 274 32.3 105.3 1.37 334 38.9 115.2 1.72 394 45.4 125.1 2.10
40 90 5.37 74.8 0.52 175 10.4 88.9 0.60 238 13.9 99.4 0.68 302 17.5 109.9 0.77
HUH1-30-C-5 10 ∆P > 15 PSI, use a 3 pass model
∆P > 15 PSI, use a 3 pass model
∆P > 15 PSI, use a 3 pass model
∆P > 15 PSI, use a 3 pass model
20 243 29.0 100.2 3.67 302 35.6 109.9 5.10 361 42.1 119.6 6.71 419 48.3 129.2 8.47
40 166 9.93 87.4 0.94 227 13.5 97.6 1.25 288 16.9 107.7 1.63 349 20.2 117.8 2.05
HUH1-30-C-7 10 ∆P > 15 PSI, use a 3 pass model
∆P > 15 PSI, use a 3 pass model
∆P > 15 PSI, use a 3 pass model
∆P > 15 PSI, use a 3 pass model
20 256 30.6 102.2 10.0 315 37.1 111.8 14.2 ∆P > 15 PSI, use a 5 pass model
∆P > 15 PSI, use a 5 pass model
40 190 11.4 91.1 1.63 250 14.8 101.1 2.57 310 18.2 111.0 3.68 370 21.4 120.9 4.93

• * HUH single-pass heaters are not recommended for liquid service. In most cases, a smaller multi-pass heater would be more economical.
• If using 50 Hz power supply, derate output values by 6%.
• The above fi gures are based on calculations at sea level.
• Refer to model coding page.
• † Mixing ratio of ethylene glycol with water is by weight.

Water Performance Tables - 60°F EAT @ 60 Hz
  Entering Water Tempertaure
180°F
200°F
220°F
240°F
Model
∆T
°F
Output
103Btu/Hr
FLOW USGPM
FAT
°F
∆P PSI
Output
103Btu/Hr
FLOW USGPM
FAT
°F
∆P PSI
Output
103Btu/Hr
FLOW USGPM
FAT
°F
∆P PSI
Output
103Btu/Hr
FLOW USGPM
FAT
°F
∆P PSI
HUH1-12-C-1*
10 20 4.10 76.5 0.01 27 5.49 82.1 0.01 33 6.89 87.8 0.01 40 8.32 93.5 0.02
20 15 1.60 72.9 0.00 19 1.99 76.0 0.00 23 2.39 79.3 0.00 27 2.80 82.5 0.00
40 13 0.69 71.0 0.00 17 0.87 74.0 0.00 21 1.07 77.2 0.00 25 1.27 80.5 0.00
HUH1-12-C-3 10 30 6.30 85.2 0.27 37 7.69 90.9 0.40 44 9.09 96.6 0.55 51 10.5 102.3 0.73
20 23 2.38 78.9 0.04 30 3.08 84.6 0.07 37 3.77 90.3 0.10 43 4.49 96.0 0.14
40 14 0.71 71.2 0.00 18 0.90 74.4 0.01 23 1.19 79.1 0.01 30 1.55 84.8 0.02
HUH1-16-C-1* 10 37 7.62 80.2 0.01 47 9.80 86.1 0.02 58 11.9 92.0 0.02 69 14.2 98.0 0.03
20 25 2.62 73.9 0.00 31 3.24 77.3 0.00 39 4.00 81.3 0.00 50 5.11 87.2 0.01
40 22 1.12 71.8 0.00 28 1.42 75.1 0.00 34 1.75 78.6 0.00 40 2.07 82.0 0.00
HUH1-16-C-3 10 50 10.39 87.7 0.45 61 12.57 93.6 0.66 72 14.8 99.5 0.89 82 17.0 105.4 1.18
20 40 4.17 82.2 0.08 51 5.26 88.1 0.12 62 6.36 94.1 0.18 72 7.48 100.0 0.24
40 23 1.17 72.6 0.01 33 1.70 78.3 0.02 44 2.25 84.2 0.03 54 2.81 90.2 0.04
HUH1-16-C-5 10 53 11.12 89.5 2.37 64 13.20 95.3 3.35 75 15.5 101.2 4.52 86 17.7 107.1 5.91
20 46 4.75 85.3 0.46 56 5.84 91.2 0.69 67 6.94 97.1 0.96 78 8.05 103.0 1.28
40 32 1.64 77.6 0.06 42 2.19 83.5 0.11 53 2.74 89.5 0.16 64 3.30 95.4 0.23
HUH1-20-C-1* 10 71 14.65 81.3 0.03 89 18.39 86.9 0.04 107 22.1 92.5 0.06 126 26.1 98.1 0.08
20 43 4.41 72.8 0.00 61 6.29 78.4 0.00 79 8.17 83.9 0.01 98 10.1 89.6 0.01
40 36 1.87 70.9 0.00 46 2.38 73.9 0.00 56 2.92 77.1 0.00 67 3.46 80.3 0.00
HUH1-20-C-3 10 89 18.49 87.0 1.03 108 22.24 92.6 1.46 126 26.1 98.1 1.98 145 29.8 103.7 2.59
20 74 7.72 82.5 0.19 93 9.60 88.0 0.29 111 11.5 93.6 0.41 130 13.4 99.2 0.55
40 47 2.48 74.2 0.02 66 3.40 79.7 0.04 84 4.34 85.3 0.06 103 5.30 90.9 0.09
HUH1-20-C-5 10 94 19.53 88.4 4.99 112 23.27 93.9 7.01 131 27.0 99.5 9.40 149 30.8 105.0 12.19
20 83 8.55 84.8 1.02 101 10.39 90.4 1.45 119 12.3 96.0 2.05 138 14.2 101.5 2.71
40 61 3.15 78.2 0.15 79 4.10 83.8 0.25 98 5.05 89.4 0.37 116 6.01 95.0 0.52
HUH1-24-C-1* 10 161 33.15 98.6 0.04 196 40.31 106.7 0.06 235 52.8 116.1 0.16 273 61.8 125.1 0.20
20 119 12.26 88.5 0.01 152 15.69 96.3 0.07 189 20.3 105.1 0.08 228 25.8 114.3 0.09
40 42 2.15 70.00 0.00 58 3.01 74.0 0.06 115 6.05 87.5 0.06 152 8.41 96.3 0.06
HUH1-24-C-3 10 189 38.96 105.1 1.52 225 46.44 113.8 2.10 264 59.2 123.0 3.31 302 68.5 132.0 4.34
20 165 16.94 99.3 0.38 200 20.68 107.8 0.51 237 25.6 116.6 0.72 275 29.9 125.7 1.20
40 121 6.27 88.9 0.13 156 8.03 97.1 0.15 191 10.1 105.5 0.19 229 12.7 114.6 0.25
HUH1-24-C-5 10 199 41.04 102.3 7.66 237 48.73 110.2 10.7 274 56.5 118.3 14.3 ∆P > 15 PSI, use a 3 pass model
20 179 18.39 97.8 1.65 216 22.24 105.6 2.36 253 26.2 113.6 3.22 291 30.1 121.8 4.25
40 141 7.29 89.6 0.31 177 9.14 97.3 0.45 212 11.0 104.7 0.64 251 13.0 112.9 0.86
HUH1-24-C-7 10 ∆P > 15 PSI, use a 5 pass model ∆P > 15 PSI, use a 5 pass model ∆P > 15 PSI, use a 5 pass model ∆P > 15 PSI, use a 5 pass model
20 183 19.0 98.8 4.45 222 2.86 106.9 6.35 260 26.8 115.0 8.62 298 30.9 123.1 11.3
40 147 7.63 90.8 0.81 185 9.60 98.9 1.23 224 11.5 107.1 1.74 262 13.6 115.3 2.34
HUH1-30-C-1* 10 249 51.6 101.1 0.31 305 63.17 110.4 0.34 362 74.8 119.7 0.39 419 86.6 129.1 0.44
20 187 19.4 90.8 0.24 243 25.14 100.1 0.25 299 31.0 109.4 0.27 357 36.9 118.9 0.28
40 120 6.22 79.8 0.23 153 7.92 85.2 0.23 188 9.75 91.1 0.24 244 12.6 100.3 0.24
HUH1-30-C-3 10 288 59.6 107.5 2.77 344 70.97 116.7 3.92 399 82.5 125.9 5.07 456 94.1 135.2 6.39
20 253 26.2 101.7 1.02 309 32.00 111.0 1.26 365 37.7 120.3 1.53 421 43.5 129.6 1.86
40 186 9.68 90.9 0.59 243 12.57 100.2 0.64 300 15.5 109.5 0.71 357 18.4 118.9 0.78
HUH1-30-C-5 10 297 61.5 109.0 12.1 ∆P > 15 PSI, use a 3 pass model ∆P > 15 PSI, use a 3 pass model ∆P > 15 PSI, use a 3 pass model
20 268 27.8 104.4 3.05 324 33.56 113.6 4.13 380 39.4 122.8 5.40 437 45.2 132.1 6.90
40 214 11.1 95.4 0.96 270 14.03 104.7 1.20 327 16.9 114.1 1.49 384 19.8 123.4 1.84
HUH1-30-C-7 10 ∆P > 15 PSI, use a 5 pass model ∆P > 15 PSI, use a 3 pass model ∆P > 15 PSI, use a 3 pass model ∆P > 15 PSI, use a 3 pass model
20 276 28.6 105.4 7.71 332 34.29 114.6 10.89 ∆P > 15 PSI, use a 5 pass model ∆P > 15 PSI, use a 5 pass model
40 227 11.7 97.3 1.44 283 14.65 106.6 2.17 340 17.6 115.9 3.03 396 20.5 125.2 4.06

• * HUH single-pass heaters are not recommended for liquid service. In most cases, a smaller multi-pass heater would be more economical.
• If using 50 Hz power supply, derate output values by 6%.
• The above figures are based on calculations at sea level.
• Refer to model coding page.

HUH Engineering Specifications
1.0 General

1.1 Heat-exchanger unit heater(s) shall be supplied and installed in accordance with the plans and specifications and shall be Hazloc Heaters’ HUH series.

1.2 The unit heater(s) shall be (select one):

• suitable for steam applications operating @ ______ psi, producing __________MBH @ entering air temperature of _______ °F and @ an altitude of _________ feet.

• suitable for _______________ (type of fl uid) producing ___________ MBH @ entering fluid temperature of _______ °F, exiting fl uid temperature of _______ °F, entering air temperature of _______ °F and @ an altitude of _________ feet.

2.0 Heat Exchanger

2.1 The heat exchanger shall be constructed of carbon-steel headers conforming to ASME requirements with 5/8 in. (15.9 mm) outside diameter [16-gauge, 0.065 in. (1.6 mm) wall thickness] carbon-steel tubes with 1-1/2 in. (38.1 mm) outside diameter copper-free, L-foot, tension-wound aluminum fins @ 10 fins per in.

2.2 Inlet and outlet connections shall be 2” NPT female extra heavy-duty steel type.

2.3 The heat exchanger shall be suitable for pressures up to 400 psi (2758 kPa) and an operating temperature of 550°F (288°C).

3.0 Cabinet Assembly

3.1 The cabinet assembly shall be of a rivet and bolt together design using 14 gauge, 0.075 in. (1.9 mm) steel with a yellow baked epoxy/polyester powder coating.

3.2 Louver blades shall be individually adjustable and made of anodized extruded aluminum.

4.0 Fan & Motor Assembly

4.1 The fan shall be an accurately balanced propeller design with aluminum blades riveted to a steel hub, driven directly by the motor.

4.2 The fan shall be shielded with a heavy-duty steel wire, epoxy-coated guard. To provide easy maintenance and cleaning of the fan and motor, the fan guard shall be of a two piece construction. The guard shall not allow a 3/8 in. (9.5 mm) probe to enter.

4.3 The motor shall be heavy-duty industrial type with permanently lubricated ball bearings, and be UL Listed and/or CSA Certified.

The unit heater(s) shall be (select one):

• Totally enclosed and rated for _______ volt, _______ phase, _______ hertz service.

• Explosion-proof and rated for _______ volt, _______ phase, _______ hertz service, Class _______ , Div. (Zone) _______ , Group(s) ____________. Temp. Code _______.

Additional Products Available
Additional Products Available

SRH
he SRH series of heat-exchanger unit heaters is designed for steam applications ondrilling rigs and is designed for pressures up to 100 psi. Meets ASME requirements with a CRN.

HHP
The high performance series of heat-exchanger unit heaters is designed for steam, hot water, glycol or other fluid circulating heating systems. Suitable for pressures and temperatures up to 450 psi and 550 °F respectively. Meets ASME requirements with a CRN.

XEU1
The XEU1 series of explosion-proof electric air heaters are designed to meet U.S. and Canadian certification standards. The three sizes of XEU1 heaters are available in 27 model choices of voltage and heat output combinations to meet your specific requirements.

Limited 18-Month Warranty

Hazloc Heaters™ warrants all SRH series of explosion-proof electric heaters against defects in materials and workmanship under normal conditions of use for a period of eighteen (18) months from date of purchase based on the following terms:
• 1. The heater must not be modified ed in any way.
• 2. The heater must be stored, installed and used only in accordance with the owner’s manual and attached data plate information.
• 3. Replacement parts will be provided free of charge as necessary to restore any unit to normal operating condition, provided that the defective parts be returned to us freight prepaid and that the replacement parts be accepted freight collect.
• 4. The complete heater may be returned to our manufacturing plant for repair or replacement (at our discretion), freight charges prepaid.
• 5. Contamination by dirt, dust, etc. or corrosion will not be considered as defects.
• 6. This warranty shall be limited to the actual equipment involved and, under no circumstances, shall include or extend to installation or removal costs, or to consequential damages or losses.