Yes. The Citius is a motorised treadmill with a powered incline, so it has to stand within reach of a mains supply and the room plan starts from where that supply is. The clearest practical difference between the Citius and the two curved Sprintboks is that the Sprintboks are self-powered and take no electrical connection at all. Tell us where the machine is going and we will confirm the supply requirement with NOHrD before a delivery date is booked.

Up to 30 km/h, in increments of 0.1 km/h. The step size holds across the full range, so a 1 km/h walking pace is set as precisely as a 25 km/h effort and there is no coarse band at the bottom of the dial. The motor holds whatever figure is entered. A tenth of a kilometre per hour is a unit you can actually work to on this belt.

Up to 25%, driven under power and entered on the same integrated display as the speed. Neither the Sprintbok V2 nor the Sprintbok Pro has a gradient control, because the curve on those machines is cut into the wooden frame and is fixed. Gradient work on a NOHrD treadmill means the Citius.

155 x 60 cm of rubberised slat belt. At 60 cm it is the widest of the three NOHrD treadmills, 15 cm wider than the 160 x 45 cm surface both Sprintbok models run, and 5 cm shorter along the belt. If belt width is what decides the machine for your runners, that 60 cm figure is the one to compare.

One year from the date of initial shipment, taken to two years on all components and all wooden components by registering within that first year. Spare parts carry 90 days. The cover runs for private and commercial use, and it is voided by accident, abuse, misuse, modification, normal wear and tear, and maintenance carried out outside the steps in the NOHrD manual.

Up to 90%. The belt is made of rubberised slats and the absorption is a property of that construction, so it is the same at every speed and every gradient with nothing to set on the console. It is a different surface from the hard linoleum-faced slats on the Sprintbok deck and from the single continuous rubber belt a conventional treadmill uses.

It is a second working mode carried on the Citius display alongside the running data, so one machine covers running and pushing work on the same belt. Because it lives on the console, it needs no attachment to fit and nothing to store beside the treadmill. Ask us for a walk-through of the console before you order if the push mode is part of what you are buying the machine for.

A long-life brushless DC motor with servo technology, which drives both the belt and the powered incline. The servo control is what holds an entered speed steady as the load on the belt changes through each stride. It is the component that separates the Citius from every other treadmill NOHrD builds, since the Sprintbok models have no motor of any kind.

250 kg, which is roughly 551 lb, and the machine itself weighs 215 kg. That user rating is about 90 kg above the 160 kg both Sprintbok models carry, and it is the highest figure on any NOHrD treadmill. NOHrD's warranty applies to private and to commercial use at that rating.

174 x 91 x 165 cm, plus clearance behind the deck for a runner stepping off and enough room at the sides to work around a 215 kg machine. Height is worth checking against a low ceiling, because a runner on a deck at full incline stands higher than the machine does. The supply position matters as much as the footprint, since this is the one NOHrD treadmill that plugs in.

No. It ships as a single package by carrier and arrives built, so the work on delivery day is getting 215 kg through the door and into position, with no frame to put together. Measure the access route before the date is booked and tell us about stairs, lifts and door widths so the carrier arrives with the right crew.

All six of the range woods are built for it, with Shadow the entry finish and Walnut the dearest. The spread between those two ends is wider on the Citius than on any other NOHrD machine, so the wood is a larger part of the decision here than it is anywhere else in the line, and it buys nothing mechanical: the motor, the belt, the incline and the rating are identical across all six.

NOHrD builds it at its factory in Nordhorn, Germany, which is also where warranty repairs are carried out or assigned to a nominated service centre. NOHrD is the wood equipment line from WaterRower, and the Citius sits at the top of its treadmill range.

It comes down to who drives the belt and whether you have an outlet. The Citius is motorised, so it holds a speed you enter to 30 km/h in 0.1 km/h steps, climbs to 25%, takes a 250 kg user and needs a mains supply. The Sprintbok V2 and the Sprintbok Pro are curved and manual, so the runner sets the pace, there is no gradient control and no outlet is involved. Held paces and hill work point to the Citius; effort-driven running in a room with no spare socket points to a Sprintbok.