Utah Admin. Code R362-2-8 - Investment Tax Credit, Eligible Costs for Commercial and Residential Systems, Passive Solar
(1) An eligible
passive solar system must be purposefully designed to use the structure of a
building to collect, store, and distribute heating or cooling to a building and
to do so at the appropriate season and time of day. All passive solar systems
should contain the following to be eligible:
(a) A means to allow the solar energy to
enter the system;
(b) A
heat-absorbing surface;
(c) A
thermal storage mass located within the conditioned space;
(d) A heat transferal system or mechanism;
and
(e) protection from summer
overheating and excessive winter heat-loss.
(2) A passive system must receive an average
of at least four hours of sunlight per day during the winter months of December
through March and shall be primarily south facing.
(3) Eligible costs for a passive solar system
include the costs of the following:
(a) trombe
wall;
(b) water wall;
(c) thermosyphon;
(d) equipment or building shell components
providing direct heat gain; and
(e)
any item that can be demonstrated to be a component of a purpose-built system
to collect, store and transport heat from the sun. The cost of ventilation,
fans, movable insulation, louvers, overhangs and other shading devices shall be
eligible provided that they are designed to be used as an integral part of the
passive solar system and not part of the conventional building design.
(3) The cost of a
solarium is eligible if it provides heat to the living space of the house in
conjunction with a thermal storage mass and a forced or natural convection heat
transportation design. Solariums must also be designed to prevent heat loss at
night by means of insulation devices. They must also be designed to prevent
summer heating that would increase the load on the building's cooling
system.
(4) The cost of windows and
other glazing devices are eligible only if they are part of a passive solar
system that uses thermal mass storage and a passive or active heat
transportation system to provide heating throughout the building.
(5) The cost of heat transportation systems
shall be eligible if they are part of the passive solar design and will not be
used as part of a conventional heating system.
Notes
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