Inline fan housing assemblies

1. An inline fan housing assembly for housing a motorized impellor and connecting an inline fan housing to a conduit, the inline fan housing assembly comprising:

an inline fan housing comprising an exhaust port and an inlet port;

a first connector collar for connecting the inline fan housing to a conduit, the first connector collar comprising:

a body having a housing connection end of a diameter for connection with the inlet port of the inline fan housing and a conduit connection end of a diameter for connection with a conduit;

the housing connection end in fluid communication with the conduit connection end;

a second connector collar for connecting the inline fan housing to a conduit, the second connector collar comprising:

a body having a housing connection end of a diameter for connection with the exhaust port of the inline fan housing and a conduit connection end of a diameter for connection with a conduit, the housing connection end in fluid communication with the conduit connection; and

an inner inlet ring for insertion into the inlet port, comprising an outer end configured for connection with the inlet port and an inner end of a diameter substantially the same as the motorized impellor for directing air drawn in through the inlet port into the motorized impellor,

wherein the diameter of the housing connection end of each connector collar is different from the diameter of the conduit connection end of each connector collar.

2. The inline fan housing assembly of claim 1 , wherein the diameter of the housing connection end of each connector collar is larger than the diameter of the conduit connection end of each connector collar.

3. The inline fan housing assembly of claim 1 , wherein the conduit connection end of at least one of the first and second connector collars comprises:

a first outer step and at least one subsequent inner step, each subsequent inner step of a smaller diameter, each step comprising a run configured for connection with a conduit of a corresponding diameter and a baffle configured for connection between adjacent runs of each step to effect the change in diameter between each step.

4. The inline fan housing assembly of claim 3 , wherein each subsequent inner step is removably connected;

whereby removal of the inner steps having a diameter smaller than a conduit to be connected allows for greater air flow through the connector collar.

5. The inline fan housing assembly of claim 3 , wherein each baffle is removably connected to adjacent runs, each baffle is annular and is pre-scored to facilitate removal.

6. The inline fan housing assembly of claim 3 , wherein each run extends at one end to a point substantially flush with the housing connection end.

7. The inline fan housing assembly of claim 3 , comprising two subsequent inner steps.

8. The inline fan housing assembly of claim 3 , wherein the baffle is tapered, uni-angular, multi-angular, convex or concave.

9. The inline fan housing assembly of claim 3 , further comprising a frangible strut between one or more adjacent runs.

10. The inline fan housing assembly of claim 1 , wherein the first connector collar is connected in place of the inlet port.

11. The inline fan housing assembly of claim 1 , wherein the second connector collar is connected in place of the exhaust port.

12. The inline fan housing assembly of claim 1 , wherein the fan housing and the first and second connector collars are unitary in construction.

13. The inline fan housing assembly of claim 1 , wherein the fan housing and the inner inlet ring are unitary in construction.

14. A method of securing a conduit to an inlet port of an inline fan housing comprising the steps of:

i) providing an inline fan housing with motorized impellor therein;

ii) inserting into the inlet port of the inline fan housing an inner inlet ring comprising an outer end configured for connection with the inlet port and an inner end of a diameter substantially the same as the motorized impellor for directing air drawn in through the inlet port into the motorized impellor;

iii) connecting to the inlet port a connector collar for connecting the inline fan housing to a conduit, the connector collar comprising:

a body having a housing connection end of a diameter for connection with the inlet port of the inline fan housing and a conduit connection end of a diameter for connection with a conduit; and

iv) connecting a conduit to the conduit connection end of the connector collar.

15. The method of claim 14 , wherein the conduit connection end of the connector collar comprises a first outer step and at least one subsequent removable inner step, each subsequent removable inner step of a smaller diameter, and the method further comprises the step of:

v) removing each subsequent removable inner step which is not connected to the conduit.

16. A method of securing a conduit to an exhaust port of an inline fan housing comprising the steps of:

i) providing an inline fan housing with motorized impellor therein;

ii) connecting to the inlet port a connector collar for connecting the inline fan housing to a conduit, the connector collar comprising:

a body having a housing connection end of a diameter for connection with the exhaust port of the inline fan housing and a conduit connection end of a diameter for connection with a conduit; and

iii) connecting a conduit to the conduit connection end of the connector collar, wherein the conduit connection end of the connector collar comprises a first outer step and at least one subseciuent removable inner step, each subseciuent removable inner step of a smaller diameter, and the method further comprises the step of:

iv) removing each subsequent removable inner step which is not connected to the conduit.