The duct run behind a China Grove dryer
Appliances retro-fitted into a house that had none of them originally, which produces the improvisations common across all the mill-village stock in this service area: dishwashers in converted cabinet spaces, ice supplies on saddle valves clamped to accessible pipework, and dryer ducts through the nearest wall. Electric predominates and the laundry is on the ground floor, which keeps duct runs short and shifts the likely no-heat dryer diagnosis away from airflow.
That is the context for the one measurement that decides most dryer calls. The North Carolina residential code adopts IRC M1502.4.6: a maximum exhaust duct length of 35 feet, measured from the transition duct at the back of the machine to the terminal outside. Then the deductions in Table M1502.4.6.1 apply: five feet for every 90-degree elbow and 2.5 feet for every 45.
So 22 feet of actual duct with four right-angle bends in it is 42 feet of equivalent length, and it is over the limit by seven. It does not look over the limit. It looks like a short duct.
Below a certain air velocity lint stops being carried along and starts settling on the duct wall, so an over-length run progressively closes itself. Drying times stretch, the machine cuts out on its thermal protection, and eventually the heating element or the thermal fuse fails. That is the part everybody quotes, and fitting a new one into the same duct buys the same failure on the same schedule. The NFPA attributes roughly 14,000 home fires a year to clothes dryers and names failure to clean, meaning lint accumulation in the duct, as the leading cause.
We measure the run in China Grove, count the elbows, calculate the equivalent length and write it on your paperwork against the 35-foot limit. Where it is over we quote the rework as a separate line you can decline. Where it is simply dirty we clear it and say so, because that is the cheaper answer and it is frequently the true one.
The commercial position is the same in China Grove as it is at a Charlotte address, because the rate card on this site is not a Charlotte rate card. The diagnostic visit is $89 and it comes off the invoice in full when you approve the repair. Labour beyond that is $95 to $145 an hour. Nothing is added for the drive, and if the same fault returns after we have fixed it the return visit carries no fee at all.

What China Grove itself changes
The kitchens in China Grove
China Grove grew around milling and the 1903 roller mill still stands in the centre of it, with small, close-together, still-occupied housing around it and newer building on the edges. The recurring characteristic in the older housing is that the kitchen is a through-route rather than a destination: a room that connects the front of the house to the back, with a doorway at each end and appliances arranged along whatever wall was left. That has a direct consequence for appliance work, because a machine that projects further than the one it replaces obstructs the route through the house, and the dimension that decides a replacement is frequently depth rather than width.
The water and the power
Water service needs confirming for the specific address, since China Grove sits outside the Charlotte Water area and rural properties nearby are frequently on wells. Duke for power. In the mill-era housing the electrical service is the usual constraint of the period: adequate for what it was built for, added to since, and with little spare capacity for anything that needs a circuit of its own.
Getting an appliance in and out
Constrained in the older centre in a particular way. Houses are close together and close to the street, plots are small, and there is frequently not enough clearance beside a house to bring an appliance round to a back door, so everything comes through the front and along the interior route described above. That is manageable when it is planned and awkward when it is not, which is why we ask about the layout rather than the square footage.