Abstract: A fluid circulating apparatus for warming or cooling a surface includes a pressurized fluid source operative to circulate fluid through a conduit such that a supply fluid moves from a supply port of the fluid source into a first end of the conduit, through the conduit, and from a second end of the conduit to a return port of the fluid supply. A flow control when in a forward mode directs fluid from the supply port into the first end of the conduit and from the second end of the conduit to the return port, and when in a reverse mode directs fluid from the supply port into the second end of the conduit and from the first end of the conduit to the return port. A mode selector is operative to switch the flow control between forward mode and reverse mode.

Abstract: An apparatus for reducing a relative humidity of air inside an enclosed space includes a portable outside air heat exchanger unit having a fan operative to create an air stream by drawing outside air from an intake and discharging the air stream through an outlet inside the enclosed space, and a temperature adjusting element located in the air stream. A heating source supplies heat energy to the temperature adjusting element in response to directions from a heat controller. A humidity sensor is operative to sense the relative humidity of the air in a sensing location and to send a humidity signal to the heat controller to change the amount of heat energy supplied to the temperature adjusting element in response to the humidity signal. HEPA filters and ultra-violet lights can shine on the air stream to kill mold spores and the like.

Abstract: A portable apparatus for temporarily warming a plurality of vehicle engines includes a warm fluid circulation loop; an engine fluid circulation loop; a fluid heater; a fluid to fluid heat exchangers; a warm fluid pump; and an engine fluid pump. The warm fluid circulation loop connects the warm fluid heater to the fluid to fluid heat exchanger. The engine fluid circulation loop transfers engine fluid from engine fluid systems to the fluid to fluid heat exchanger. The fluid heater heats the fluid in the warm fluid circulation loop and the warm fluid is then circulated through the warm fluid circulation loop to the fluid to fluid heat exchanger to warm the engine fluid in the engine fluid circulation loop. The warmed engine fluid circulates through the engine fluid system warming the vehicle engine. The apparatus is configured to warm a plurality of vehicle engines at the same time.

Abstract: A portable apparatus for temporarily warming a plurality of vehicle engines includes a warm fluid circulation loop; an engine fluid circulation loop; a fluid heater; a fluid to fluid heat exchangers; a warm fluid pump; and an engine fluid pump. The warm fluid circulation loop connects the warm fluid heater to the fluid to fluid heat exchanger. The engine fluid circulation loop transfers engine fluid from engine fluid systems to the fluid to fluid heat exchanger. The fluid heater heats the fluid in the warm fluid circulation loop and the warm fluid is then circulated through the warm fluid circulation loop to the fluid to fluid heat exchanger to warm the engine fluid in the engine fluid circulation loop. The warmed engine fluid circulates through the engine fluid system warming the vehicle engine. The apparatus is configured to warm a plurality of vehicle engines at the same time.

Abstract: A system and method for cooling a concrete slab to improve curing in hot weather includes a portable liquid cooler. A conduit is connected to the liquid cooler and arranged in proximity to the concrete slab. A pump is operative to circulate liquid from the liquid cooler through the conduit such that liquid moves from a supply port of the liquid cooler into an input end of the conduit at a supply temperature, moves through the conduit, and moves from an output end of the conduit to a return port of the liquid cooler at a return temperature greater than the supply temperature. Heat is absorbed from the concrete slab and the temperature of the slab is thus reduced compared to a slab in ambient hot weather conditions.

Abstract: A apparatus for reducing a relative humidity of air inside an enclosed space comprises a portable outside air heat exchanger unit comprising a fan operative to create an air stream by drawing outside air from an intake and discharging the air stream through an outlet inside the enclosed space, and a temperature adjusting element located in the air stream. A heating source supplies heat energy to the temperature adjusting element in response to directions from a heat controller. A humidity sensor is operative to sense the relative humidity of the air in a sensing location and to send a humidity signal to the heat controller to change the amount of heat energy supplied to the temperature adjusting element in response to the humidity signal. HEPA filters and ultra-violet lights can shine on the air stream to kill mold spores and the like.