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Iowa LIHEAP Policy and Procedures Manual Appendix H – Heating System Installation Standards

Effective 09/01/2023

Page | 108

Thermostats

Energy Auditor/Inspector Document the location of the thermostat. Ensure it is not on an outside wall or near an outside door or over a heat supply/return duct. Thermostats should not be installed on a marriage wall of the manufactured home. If a thermostat is located in these areas, the thermostat may be moved using program funds and within program expenditure limits.

Compatibility will be verified (e.g., voltage, wiring condition, location) and documented. Location of existing thermostat will be assessed for appropriateness (e.g., central to the house, out of direct sunlight, away from supply air, protected from abnormal radiant surface temperatures).

Ensure the thermostat is level and dirt free. Relocate if necessary. Ensure thermostats are working properly, replace if defective. When possible, the thermostat must be wired for “fan only” function.

Mercury containing thermostats should be replaced (only when the heating unit is replaced).

WX Worker All thermostats must be installed according to the manufacturer’s instructions. When possible, the thermostat must be wired for “fan only” function.

If being replaced, mercury containing thermostats will be disposed of properly.

The LIHEAP customer will be taught how to use the thermostat and written manufacturer’s instructions are to be left with the LIHEAP customer.