HUMIDIFIER WATER FILTER

1 . A filter for a humidifier, comprising:

a housing having at least one hole allowing fluid to flow into the housing;

ion resin disposed within the housing;

a channel member disposed vertically through the ion resin;

the channel member having a hollow center portion and at least one aperture through the channel thereupon allowing fluid to flow from the ion resin into the hollow center portion of the channel; and

a filter cap secured to the housing,

the filter cap having at least one hole therethrough;

the filter cap having a one-way valve;

the one-way valve restricting the flow of water into the filter through the at least one hole,

wherein the housing is securable to a reservoir cap of a humidifier.

2 . The filter of claim 1 , wherein the housing is annular.

3 . The filter of claim 1 , wherein the housing includes a threaded member for securing the filter to the reservoir cap.

4 . The filter of claim 1 , wherein filter cap is configurable to regulate gas flow out of the filter.

5 . The filter of claim 1 , wherein the filter cap is secured to the housing by a compression fit.

6 . The filter of claim 1 , wherein the filter cap includes a threaded portion for securing the filter cap to the housing.

7 . The filter of claim 1 , wherein the filter cap is integrally formed with the housing.

8 . A humidifier comprising:

a base having a humidifying element;

a reservoir capable of holding fluid, the reservoir having a detachable reservoir cap covering an aperture in the reservoir, wherein the reservoir cap regulates the flow of fluid from reservoir to the base;

a filter securable to the reservoir cap;

the filter extending at least partially into the reservoir when the cap is secured to the reservoir,

the filter having:

a housing having at least one hole allowing fluid to flow into the housing from the reservoir,

a channel member disposed vertically within the housing, wherein a space between the housing and the channel member defines a chamber;

ion resin disposed within the chamber,

the channel member having a hollow interior portion;

the channel member having at least one aperture thereupon allowing fluid to flow from the chamber into the hollow interior portion of the channel member, and

a filter cap disposed on top of the housing;

the filter cap having a one-way valve secured thereto;

the one-way valve configured to allow gas to flow from the filter cap into the reservoir and to prevent fluid from flowing out of the reservoir through the filter cap.

9 . The humidifier of claim 8 , wherein the housing and chamber are annular.

10 . The humidifier of claim 8 , wherein the housing includes a threaded member for securing the filter to the reservoir cap.

11 . The humidifier of claim 8 , wherein the filter cap is secured to the housing by a compression fit.

12 . The humidifier of claim 8 , wherein the filter cap includes a threaded portion for securing the filter cap to the housing.

13 . The humidifier of claim 8 , wherein the filter cap and the housing are a unitary member.

14 . The humidifier of claim 8 , wherein the humidifying element is configured to vaporize from the base.

15 . The humidifier of claim 8 , wherein the humidifying element is configured to disperse fluid from the base into surrounding atmosphere.

16 . A method of filtering fluid in a humidifier, the method comprising:

securing a filter to a cap of a reservoir of a humidifier, such that filter extends into the reservoir,

receiving fluid from the reservoir through at least one hole in a housing of the filter;

filtering the fluid by allowing the fluid to pass through ion resin within the filter;

disposing of the filtered fluid by allowing the filtered fluid to pass from the ion resin into a channel disposed vertically within the ion resin; and

venting gas from the filter into the reservoir by allowing the gas to travel up through the channel and out of a one-way valve disposed above the channel, the one-way valve being configured to prevent fluid flow into the valve from the reservoir.

17 . The method of claim 16 wherein the securing step includes screwing the filter into the reservoir cap.

18 . The method of claim 16 , wherein the securing step includes screwing the filter into the reservoir cap.

19 . The method of claim 16 , further comprising removing the filter from the reservoir cap, and securing a new filter to the reservoir cap.