Trench Heating + Cooling

ISAN by Siwa Termo trench heaters are all certified to EN442 + EN16430. Suitable for low water temperature applications to insulate windows up to 40ft tall.

Natural Convection

FRK - Heating Only

These trench heaters utilize natural convection. The temperature difference of cold + hot air generates a consistent air flow across the heat exchanger due to the air density difference. This creates a reliable transfer of heat between the space, window and heat exchanger.

24VDC

FRT - Heating Only

Using low energy 24VDC fans, these trench heaters are boosted with a uniform tangential fan across ISAN’s high efficiency heat exchanger. This added air flow, allows for more GPM to flow through the unit.

24VDC

FRC(2-pipe) + FRD(4-pipe)
Heating + Cooling

With the addition of 24VDC fans, a condensate pan + pump, adding more loops to our heat exchanger; the trench heaters become trench fan coils, leading to some significant cooling capacities. 

Trench Heating
Humid Environments

Natural Convection
Humid Environment

FRM - Heating Only

Similar to the FRK with structural changes to the trench heater components (Casing, grille & heat exchanger). They have been modified to allow for longevity in corrosive or humid environments such as natatoriums.

24VDC
Humid Environment

FRB - Heating Only

Similar to the FRT with structural changes to the trench heater components (Fan, casing, grille & heat exchanger). They have been modified to allow for longevity in corrosive or humid environments such as natatoriums.

Electric Trench Heating
Coming Soon to North America

Natural Convection

FEK - Heating Only

24VDC

FET - Heating Only