What questions need to get answered when specifying a solistat heater?

1) for each hose we need to know the total length

2) we need to know how many of each hose is required on an annual basis and you want to purchase in one batch

reason: below 100 pieces we would suggest a wrapped insulator, however this is more labour intensive

a more cost effective solution can be done from higher volumes then 100 pieces, then a molded insulator would be suggested,  it all depends also on the length of the tubing

3) we need to know ID and OD (internal and external diameter of the hose)

as an example: a hose with the size OD = 28mm and ID 17mm  heated length is 30W/m which assures a trouble free operation in cold weather.  To reduce the power is also an option to use 17W/m or 12W/m, then typically a customer uses a PTC (a.k.a. self-regulating or self-limiting) heater ; then a thermostat is only required when the customer is concerned about power consumption.

hoses built at higher power level  require a thermostat, using sold models will guarantee zero failure.

if the ambient temperature is -40°C then a typical molded insulator consumes 60W or the equivalent of 275W/m

4) we need to know the clearance around the hoses.

if there is no room for insulation, then it's difficult to suggest a product

5) we need to know if there are high intensity heat sources such as turbochargers and exhaust manifolds, near the heater.

if yes, we'll need to apply a heat shield, this is to protect the insulation and also in case of a PTC heater, to protect the heater itself, it can maximum resist against +85°C

we suggest to do tests in a high humidity environment, you can send the hoses to us so we can make functional prototypes