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[tom j]

Hay guys need some suggestions on a noise filter for my furnace. I have forced air and noticed when I was checking the alarm system that the All Light On, All Lights Off function seems a little disjointed almost like it get out of sync, when I cut the furnace off it worked perfectly. I have a regular plug in module for my refrigerator, which also caused a similar problem but the filter it completely solved the problem. The furnace doesn't plug into wall socket so what would I use in that situation. Thanks!


Tom j.

[BVD]

http://www.thehomeautomationstore.com/xpf.html

Till Later
Bob

[BaBaLou.]

Tom j,

Look for a shut off switch for the furnace, u should have one near the unit by code so as to be able to shut off power to the furnace for service. Place a junction box next to it and wire in the filter to it.Make sure you turn off the power at the main panel breaker first. Gas furnaces use about 12 to 15 amp and the 20 amp filter will be just fine for this application that's only if its a standard Forced air system. Can also be done to High efficiency Hot water tanks, HVAC systems, central vac and so on. Have been doing the same to my home and have most definitely seen an decrease in noise in my system.

A suggestion from jeff to mod a 5 amp plug in filter so as to be able to hard wire it in for application for CF ls and other wired in units like Stove exhaust fan.

I have seen nothing but improved reliability with X10 since I have started filtering things around the house. RF is still a challenge with so many wireless gadgets around the house other than the usual cordless phone. so slowly things are returning to wired instead.

[Knightrider]

We really should be asking what type of furnace it is.  While the 20 amp filters would work on a gas or oil furnace (even a wood or coal system), there is a good chance that the OP has an electric furnace that could run as much as 50 amps on a 240 circuit.
While I doubt that tom j has such a device, recommending a 20 amp filter without knowledge of the system would be irresponsible.

[Brian H]

Also the XPF is a LARGE filter. It does not fit most standard electrical boxes. Measure before you buy any boxes if you go that route.

[steven r]

Also the XPF is a LARGE filter. It does not fit most standard electrical boxes. Measure before you buy any boxes if you go that route.

If I recall correctly, you need a double or triple box for it to fit. Take Brian's advice and measure first or better yet take the filter with you when you go to the hardware store.

With Googles help, I just found the online PDF manual, http://www.x10pro.com/pro/pdf/xpf.pdf...
"Dimensions 2.0"D x 1.75"W x 3.5"L fits in a three gang box."

[BVD]

We really should be asking what type of furnace it is.  While the 20 amp filters would work on a gas or oil furnace (even a wood or coal system), there is a good chance that the OP has an electric furnace that could run as much as 50 amps on a 240 circuit.
While I doubt that tom j has such a device, recommending a 20 amp filter without knowledge of the system would be irresponsible.

Knightrider,
As with so many posts in these forums requesting help tom j expected me to ASSUME exactly what type of forced air furnace he actually has. If you noticed in my post back to him I only sent him a link to the wire in 20 AMP noise filter. I did not suggest that he buy them,how many to buy, or where to put them. I ASSUMED he would know that if his furnace was on a 50 AMP / 240 Volt circuit, he might not want to use this device.

You and others may have noticed in a lot of my posts I request the OP to give me a call and list my phone number. That way I can cut through the ASSUME crap and find out exactly what the entire problem is and make a  "responsible" diagnosis of the OP's problem and make a "responsible" suggestion of how to fix it.

BTW Depending on the BTU rating of the electric furnace they can require up to a 240 Volt /120 AMP breaker. Even in the largest one I could still use the 20 AMP noise filter because I would wire it in to the motor circuit. If it were a 220 VOLT motor I would use 2 of them, 1 in each leg because the motor current is what you need to be concerned about.
Also most of these high current furnaces have a branch off circuit breaker at the furnace at a much lower current rating ( 15-20 AMPs ) to provide protection for the motor in case the TOL (Thermal Over Load )fails.

Finally, If you don't know what you are doing with electric, leave it alone and call an electrician!

Till Later,
Bob

[tom j]

We really should be asking what type of furnace it is.  While the 20 amp filters would work on a gas or oil furnace (even a wood or coal system), there is a good chance that the OP has an electric furnace that could run as much as 50 amps on a 240 circuit.
While I doubt that tom j has such a device, recommending a 20 amp filter without knowledge of the system would be irresponsible.

Hi Knighttrider, I actually have a gas forced air high efficiency furnace. Going to check to see how it's wire in. if I have to go into the box the XPF 20A Wired-In Noise Filter is to large, could you mount it outside the box. Thanks



Tom j.

[Brian H]

I would not wire it outside the box.
You could mount a new box near it and then wire to the existing wiring.
I have not found a box for mine yet. The only one I have seen in a on-line catalog was a triple missionary one. The standard three gang my local stores have is not big enough for it to fit.
Note the older documentation shows a different looking XPF than the ones I have seen. The older ones do look like that mounted in a triple wall box.

[JeffVolp]

The older one mounted on top of a triple-gang box.  The new version is smaller, and does fit into a deep triple-gang box.

Jeff

[dave w]

Hi Knighttrider, I actually have a gas forced air high efficiency furnace. Going to check to see how it's wire in. if I have to go into the box the XPF 20A Wired-In Noise Filter is to large, could you mount it outside the box. Thanks

Tom j.

Tom,
FWIW
I had Lennox Pulse furnace which generated very high noise levels. The source was the ignition/control board which had an on board switching supply. I ended up filtering only the 120V to the board. I did not need to filter the entire supply to the furnace which included the blower. I got away with a smaller sized filter whic I mounted in the furnace cabinet.

[tom j]

The older one mounted on top of a triple-gang box.  The new version is smaller, and does fit into a deep triple-gang box.

Jeff

Say JeffVolp GREAT!!!!! how do I know what one I'm getting do you have a new model number. Jeff do you have yours mounted inside. So it's smaller then the one pictured here.

Tom j.

http://www.thehomeautomationstore.com/xpf.html

[JeffVolp]

I actually have both.  My own installation has the old one that screws onto a triple-gang box.  I also carry the newer one that fits inside a deep triple-gang box.  I used a metal "masonry" box that should be readily available at places like Lowes or Home Depot.  They look like this:

http://www.garvinindustries.com/product.asp_Q_parentID_E_292_A_subCatID_E_308_A_prodID_E_1272

I had the electrical contractor install that type of electrical box wherever I had planned to install a X10 dimmer.  It gives plenty of room inside, and is much better for heat dissipation than the cheap plastic boxes.

All the XPF's I've bought over the last several years have been the new one like in your reference.  The old one was quite a bit larger.

UPDATE with dimensions:

The new XPF measures 5 1/4" long (allowing for the wire loop), 3 1/8" high, and 1 5/8" deep.  It will not fit into a triple-gang plastic box because of the screw ribs extending down into the box.  It will fit into a triple-gang metal box that has the half circle screw brackets bent down from the top and bottom.

Jeff

[Brian H]

I will second what Jeff said. The one in your link is the newer one. Like the one I have. Now all I have to do is get to an electrical supply dealer that has the larger [deep] boxes.

[tom j]

I will second what Jeff said. The one in your link is the newer one. Like the one I have. Now all I have to do is get to an electrical supply dealer that has the larger [deep] boxes.

I actually have a newer deep box so do you think it might fit? Thanks!

Tom j.