01 What makes it unique
KZ lists the 2014 Inferno 3712T at 12,680 lb dry, a GVWR of 17,100 lb, a net carrying capacity of 4,420 lb and a pin weight of 2,305 lb. Its dry weight plus its carrying capacity comes to exactly its GVWR.
It is 42' 9" long and 157" high. KZ prints its tanks as 110 gal fresh.
Among the 9 Inferno floorplans KZ’s Inferno brochure (filed in KZ’s 2014 brochure folder; the brochure prints no year) lists with a published dry weight, it is number 8 from the lightest, in a range from 10,263 lb (Inferno 3310T) to 13,576 lb (Inferno 4005T). Every figure in that comparison is KZ’s, for the same model year.
Every number on this page was read on 5 Nov 2026 from KZ’s Inferno brochure (filed in KZ’s 2014 brochure folder; the brochure prints no year); model year 2014 comes from where the maker files it on its own site, not from the document’s text.
How the 3712T differs from the other eight Inferno floorplans. Most distinctive first. How these ranks are worked out.
- Dry weight, 12,680 lb: second-heaviest of nine, between the 3710T (12,415 lb) and the 4005T (13,576 lb).
- GVWR, 17,100 lb: second-highest of nine, between the 3710T, 3722T and 3732T (16,000 lb) and the 4005T (18,500 lb).
- Cargo capacity, 4,420 lb: second-largest of nine, between the 3722T (3,800 lb) and the 4005T (4,924 lb).
- Cargo capacity as a share of GVWR, 25.8%: second-largest of nine, between the 3312T (25%) and the 4005T (26.6%).
- Length, 42 ft 9 in: second-longest of nine, between the 3732T (41 ft 8 in) and the 4005T (44 ft 5 in).
- Pin weight as a share of dry weight, 18.2%: third-smallest of nine, between the 3310T (17.7%) and the 3710T (18.6%).
- Pin weight, 2,305 lb: fifth-lightest of nine, between the 3312T (2,250 lb) and the 3710T (2,310 lb).
- Exterior height, 13 ft 1 in: lowest of nine, level with the 3312T, 3410T and 3722T; next are the 3310T and 3732T (13 ft 2 in).
Next to the 3710T, the nearest lighter floorplan by dry weight, the 3712T is 265 lb heavier by dry weight, has a GVWR 1,100 lb higher, has 835 lb more cargo capacity, has a pin weight 5 lb lighter, is 2 ft 2 in longer and stands 3 in lower; the two publish the same interior height and fresh tank.
Next to the 4005T, the nearest heavier floorplan by dry weight, the 3712T is 896 lb lighter by dry weight, has a GVWR 1,400 lb lower, has 504 lb less cargo capacity, has a pin weight 711 lb lighter, is 1 ft 8 in shorter and stands 3 in lower; the two publish the same interior height and fresh tank.
02 Full specifications
Dimensions
- Exterior length
- 42' 9"
- Exterior height
- 157"
- Exterior width
- 100"
- Interior height
- 76"
Weights
- Dry / unit base weight (UVW)
- 12,680 lb
- GVWR (max loaded)
- 17,100 lb
- Net cargo / payload (CCC)
- 4,420 lb
- Hitch / pin weight
- 2,305 lb
Capacities
- Fresh water
- 110 gal
- Grey water
- Not published by KZ
- Black water
- Not published by KZ
Running gear
- Hitch type
- Fifth wheel (pin box)
- Tire size
- 16"
Sleeping & layout
- Sleeps
- Not published by KZ
- Dry Axle Weight*
- 10,375
- Refrigerator (cu. feet)
- 6
- Water Heater Cap. (gal. G/E w/DSI)
- 12
- Waste & Gray Water Cap. (gal.)
- 114
- LP Gas Cap. (lbs.)
- 60
- Furnace BTUs (1,000s)
- 35
- Model year source
- The brochure itself prints no model year; KZ files it under 2014 in its own brochure folder (kz-rv.com/brochures/2014/).
- Awning
- 16'
How these published figures sit against the rest of the catalogue: fifth wheel pin weight and payload; fresh, grey and black tank sizes; camper trailer size chart.
Drawn to scale
Weight budget
Size, with end view
Axles, wheels and nose shape are schematic; not a floorplan. Data: dataset.
Towing it
Check your vehicle. Enter the ratings from your owner’s manual and the door-pillar placard.
Compares your figures with this page’s published GVWR (17,100 lb) and the upper loaded pin estimate (4,275 lb, a rule of thumb). Your vehicle’s placard and the trailer’s own weight label govern.
Loaded range: 15–25% of GVWR on the pin, a rule of thumb, not a measurement of this unit. No truck ratings or hitch classes (why; NHTSA, DOT HS 809 433).
03 The Inferno floorplan family
KZ’s Inferno brochure (filed in KZ’s 2014 brochure folder; the brochure prints no year) lists 9 Inferno floorplans; every one with a printed weight has a page here.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| Inferno 3310T | 35' 3" | — | Profiled |
| Inferno 3010T | 35' 1" | — | Profiled |
| Inferno 3312T | 37' 3" | — | Profiled |
| Inferno 3410T | 36' 9" | — | Profiled |
| Inferno 3722T | 40' 0" | — | Profiled |
| Inferno 3732T | 41' 8" | — | Profiled |
| Inferno 3710T | 40' 7" | — | Profiled |
| Inferno 3712T | 42' 9" | — | Profiled |
| Inferno 4005T | 44' 5" | — | Profiled |
KZ’s Inferno brochure (filed in KZ’s 2014 brochure folder; the brochure prints no year) lists 9 Inferno floorplans. Every one with a printed weight has a page here.
04 Notes on this floorplan
What KZ does not publish for the Inferno 3712T
KZ prints no grey-tank, black-tank, sleeping capacity for this model, so none is given. Nothing is filled from a sibling model, a different model year or a dealer listing.
Read the label on the trailer
Federal rules put a load-carrying label inside every RV trailer: its unloaded weight with full propane, its cargo carrying capacity and its GVWR (49 CFR 571.110 and 571.120). Those figures come from the trailer itself and govern the towing decision.
05 How it compares
12,415 lb dry and 16,000 lb GVWR, against this model’s 12,680 lb and 17,100 lb.
13,576 lb dry and 18,500 lb GVWR, against this model’s 12,680 lb and 17,100 lb.
06 Loading it for a trip
A full 110-gallon fresh tank is about 913 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 21% of the Inferno 3712T’s 4,420 lb cargo capacity, leaving 3,507 lb. Across 9 Inferno floorplans the water share runs 19% to 33%, and 7 give up more than this one. Nearest on that share: Inferno 4005T at 19% and Inferno 3722T at 24%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).
07 Where this floorplan sits
Closest sibling: the Inferno 3710T, nearest on the published figures. It differs on 5 of the 6 fields both publish (this plan first): length 42 ft 9 in vs 40 ft 7 in; dry weight 12,680 lb vs 12,415 lb; GVWR 17,100 lb vs 16,000 lb; cargo capacity 4,420 lb vs 3,585 lb; hitch weight 2,305 lb vs 2,310 lb. They match on fresh tank.
| Inferno plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 17,100 | 8 of 9 | 13,000–18,500 |
| Dry weight (lb) | 12,680 | 8 of 9 | 10,263–13,576 |
| Cargo capacity (lb) | 4,420 | 8 of 9 | 2,737–4,924 |
| Hitch weight (lb) | 2,305 | 5 of 9 | 1,820–3,016 |
| Length | 42 ft 9 in | 8 of 9 | 35 ft 1 in–44 ft 5 in |
Either side of it by GVWR: Inferno 3732T is 1,100 lb lighter (16,000 lb GVWR); Inferno 4005T is 1,400 lb heavier (18,500 lb GVWR).
| Nearest Inferno siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Inferno 3712T | 42 ft 9 in | — | 12,680 | 17,100 | 4,420 | 2,305 | 110 |
| Inferno 3710T | 40 ft 7 in | — | 12,415 | 16,000 | 3,585 | 2,310 | 110 |
| Inferno 3722T | 40 ft 0 in | — | 12,200 | 16,000 | 3,800 | 2,080 | 110 |
| Inferno 3732T | 41 ft 8 in | — | 12,390 | 16,000 | 3,610 | 2,610 | 110 |
| Inferno 4005T | 44 ft 5 in | — | 13,576 | 18,500 | 4,924 | 3,016 | 110 |
| Inferno 3312T | 37 ft 3 in | — | 10,650 | 14,200 | 3,550 | 2,250 | 110 |
All 9 Inferno floorplans: Inferno line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| Inferno 3712T | 17,100 | 12,680 | — | 42 ft 9 in |
| Vengeance Rogue 351G2 | 17,050 | 13,564 | — | 44 ft 2 in |
| Sandstorm 3217GX | 17,160 | 13,124 | — | 38 ft 4 in |
| North Point 340CKTS | 17,000 | 13,880 | 4 | 37 ft 10 in |
| Sidewinder 3814DK | 17,000 | 12,430 | — | 41 ft 4 in |
| Torque 371 | 17,000 | 14,145 | 8 | 42 ft 11 in |
| Model Z 3300 | 16,995 | 13,127 | — | 36 ft 7 in |
Against the Inferno 3712T: the Vengeance Rogue 351G2 is 50 lb lighter and 1 ft longer; the Sandstorm 3217GX is 60 lb heavier and 4 ft shorter; the North Point 340CKTS is 100 lb lighter and 5 ft shorter.
08 Common questions about the Inferno 3712T
How much does the Inferno 3712T weigh?
12,680 lb dry; 17,100 lb GVWR, the most it may weigh loaded.
How much can the Inferno 3712T carry?
4,420 lb, 26% of its GVWR (median across 442 fifth wheels here: 19%). A full fresh tank uses 913 lb of it.
What is the pin weight of the Inferno 3712T?
2,305 lb as published, 18% of the dry weight (median across 686 fifth wheels here: 19%).
What size tow vehicle does the Inferno 3712T need?
A tow rating of at least 17,100 lb, plus payload for the loaded pin weight, passengers and cargo.
How long is the Inferno 3712T?
42' 9" overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
10 of the 18 fields this catalogue tracks are published for the Inferno 3712T. Not published: grey tank, black tank, sleeps, slide count, axle count, refrigerator, air conditioning, tire size (a description is published, a size is not).
Sourcing rules: methodology.
10 Manuals & documents
Sources: kz-rv.com (linked below); the full source note is at the foot of the page.
11 NHTSA safety record
NHTSA holds 4 recall campaigns and 3 owner complaints (model years 2005 on) against the Inferno line (a recall and a complaint are not the same thing).
Too few reports to show a pattern. 3 complaints have been filed on this line — not enough to say what fails most often. They cover service brakes, hydraulic, structure and suspension.
Recall coverage here is not complete, and complaints are owners’ unverified reports (how this record is built). Check a specific VIN at NHTSA before you buy. Full tables are on the Inferno line page.
Earlier model years
The record at the top of this page is the 3712T from 2014. The maker’s own documents for earlier model years also list the 3712T, and that year is printed here: 2013. The figures change from year to year, so check the year on the trailer’s own label. A field a year’s brochure does not print reads “Not published” and is never filled from another year.
| Model year | Dry (UVW) | GVWR | Cargo (CCC) | Dry pin | Length | Sleeps |
|---|---|---|---|---|---|---|
| 2013 | 12,680 | 17,100 | 4,420 | 2,305 | 42' 9" | Not published |
Full record for each earlier model year
2013 3712T 12,680 lb dry · 17,100 lb GVWR
Dimensions
- Exterior length
- 42' 9"
- Exterior width
- 100"
- Exterior height
- 157"
- Interior height
- 76"
Weights
- Dry / unit base weight (UVW)
- 12,680 lbs
- GVWR (max loaded)
- 17,100 lbs
- Net cargo / payload (CCC)
- 4,420 lbs
- Dry pin weight
- 2,305 lbs
Running gear
- Tire size
- 16"
- Hitch type
- Fifth-wheel (in-bed)
- Model year of record
- 2013
Capacities
- Fresh water
- 110 gal
- Grey water
- Not published
- Black water
- Not published
- Awning
- 16'
Sleeping
- Sleeps
- Not published
As printed in this brochure
- Dry Axle Weight* (as printed)
- 10,375
- Refrigerator (cu. feet) (as printed)
- 6
- Water Heater Cap. (gal. G/E w/DSI) (as printed)
- 12
- Waste & Gray Water Cap. (gal.) (as printed)
- 114
- LP Gas Cap. (lbs.) (as printed)
- 60
- Furnace BTUs (1,000s) (as printed)
- 35
- Dry Hitch Weight footnote
- Brochure footnote: "This weight reflects the rolling average unit weight for each model."
Source for 2013. Printed in KZ RV’s Inferno brochure (www.kz-rv.com). The document itself prints no model year; KZ RV files it under 2013 in its own brochure folder. Dry weight plus cargo capacity equals the printed GVWR exactly (12,680 + 4,420 = 17,100 lb). Nothing in this record is copied from another model year.
NHTSA record for 2013 Inferno
1 recall campaign filed with NHTSA names the Inferno for model year 2013:
- 17V749000 (reported 21 Nov 2017): Equipment
No owner complaint filed with NHTSA names the Inferno for model year 2013. NHTSA files recalls and complaints by line and model year, not by floorplan, so a campaign listed here may not affect every Inferno floorplan; the recall notice says which units it covers.