LARGE FIBERGLASS
We categorize our enclosures intended for BF installations of 3" through 10" as large fiberglass enclosures. Large fiberglass products include the DESIGNER Seriesä Modular fiberglass, and the DESIGNER Seriesä LOW PROFILE Seriesä fiberglass flip-top. Insulation is spray-applied polyisocyanurate foam (structural unicellular insulation) 1 ½" thick to provide a minimum R value of 8. All insulated Hot Box ®products are designed to protect to -30 F when installed with heat.
- All DESIGNER Seriesä enclosures feature designer inlays for strength and appearance + gas spring lid supports.
- DESIGNER Seriesä Modular fiberglass enclosures feature front and rear access doors mounted on "lift-off" hinges that are lockable from the inside.
- All Hot Box ® products are priced and furnished with heat (unless specified otherwise, in which case they become a LOK BOXä ).
- DESIGNER Seriesä Low Profile enclosures are also available without insulation. See chart below for details.
- Need appropriate sizing for backflow preventers? See the Cad Library.

DESIGNERä Series Lok Box™ |

LOW PROFILE Series™
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These drawings are available for printing and/or download in the Standard Drawings Table
NOTE: The linked files are .pdf's. If you do not already have Adobe Acrobat Reader installed to view them you may download it here.
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Large Insulated Fiberglass Flip-Top Style Enclosures
and LOK BOX™ without the heater
ASSE 1060 Certified
Click the Unit No. for the corresponding .pdf drawing |
Unit No.
(Heated) |
Heat |
Unit No.
(Unheated) |
Inside Dimensions |
Pad Size |
Shipping Wt. |
HB3N |
1000W |
LB3N |
70"L x 26"W x 45"H |
82 x 38 |
325lbs. |
HB3NS |
1500W |
LB3NS |
83"L x 26"W x 45"H |
95 x 38 |
340lbs. |
HB3E |
1500W |
LB3E |
70"L x 26"W x 55"H |
82 x 38 |
385lbs. |
HB3ES |
1500W |
LB3ES |
83"L x 26"W x 55"H |
95 x 38 |
425lbs. |
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DESIGNER Series™ LOW PROFILE Series™
Insulated Flip-Top Fiberglass Enclosures
ASSE 1060 Certified
Click the Unit No. for the corresponding .pdf drawing |
Unit No.
(Heated) |
Heat |
Unit No.
(Unheated) |
Inside Dimensions |
Pad Size |
Shipping
Wt. |
HB3000 |
1000W |
LB3000 |
45"L x 35"W x 35"H |
57 x 47 |
150lbs. |
HB4000 |
1000W |
LB4000 |
53"L x 44"W x 44"H |
65 x 56 |
300lbs. |
| HB5000 |
1500W |
LB5000 |
62"L x 52"W x 50"H |
74 x 64 |
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DESIGNER Series™
Modular Fiberglass Enclosures
ASSE 1060 Certified
Click the Unit No. for the corresponding .pdf drawing |
Unit No.
(Heated) |
Heat |
Unit No.
(Unheated) |
Inside Dimensions |
Pad Size |
Shipping Wt. |
HB4FEM |
1000W |
LB4FEM |
41"L x 41"W x 45"H |
53 x 53 |
210lbs. |
HB6FEM |
1500W |
LB6FEM |
47"L x 47"W x 49"H |
57 x 57 |
240lbs. |
HB8FEM |
1500W |
LB8FEM |
53"L x 53"W x 56"H |
63 x 63 |
300lbs. |
HB10FEM |
2000W |
LB10FEM |
62"L x 54"W x 56"H |
62 x 54 |
390lbs. |
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EZ BOX® Insulated Drop-Over Enclosures
ASSE 1060 Certified
Click the Unit No. for the corresponding .pdf drawing |
Unit No. |
Length |
Width |
Height |
Pad Size |
Shipping Wt. |
Ez3 |
70" |
26" |
45" |
38 x 82 |
185lbs. |
Ez3S |
83" |
26" |
45" |
38 x 82 |
185lbs. |
Ez3000 |
48" |
38" |
36.5" |
57 x 47 |
150lbs. |
Ez4000 |
65" |
47" |
45.5" |
65 x 56 |
300lbs. |
Ez5000 |
64" |
55" |
53.5" |
74 x 64 |
380lbs. |
Small Fiberglass Enclosures | Aluminum Enclosures
Valve Guard Non-Insulated Enclosures
Hot Box ® is a Division of

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