mobilehomerepair.com

Hi,
First a quick introduction, my name is Brian, live in New Hampshire & have a Miller CMF 100.
I am currently looking into changing fuel systems from kerosine to natural gas because of cost & storage issues. I am hoping someone in the group can share their thoughts about the M2RL series. It is energy efficient & certified for Gov tax credits.
Thanks,
Brian

Brian,

The M2 & M3 Models are both 90% eff and your current CMF-100 kero/oil is probably somewhere around 80%. As far as the govt tax credits a hot-air furnace needs to be 95% for the new program. Inquire with your Nat gas supplier they may have a program as well that would work.

Good Luck

Rod

Rod wrote:Brian,

The M2 & M3 Models are both 90% eff and your current CMF-100 kero/oil is probably somewhere around 80%. As far as the govt tax credits a hot-air furnace needs to be 95% for the new program. Inquire with your Nat gas supplier they may have a program as well that would work.

Good Luck

Rod

Would you know anything about the equipped with Electronic Commutated Motor (ECM) or equivalent advanced furnace fan system is on this series? It a extra rebate class sponsered by CEE.

sorry. I do not believe they are.

Rod

Ok, what is the difference or changes between the M2 & M3 & now the M4 series? I went to the local wholesaler yesterday about specific info & prices. The CMF series are the only sellers up here & there is little information on Miller's website.
Brian

M2 is available in up & downflow versions. & require return air ducting.

M3 is down flow & the best option for replacement. (return air thru front door like your CMF.

M4 is wider and won't fit in most MH furnace closets.

You have a CMF 100 now, so I would replace with a M3 80 (in most cases)

Also get a base Kit (most likely you will need 6") pop up a floor vent - how deep is the collar before the top of the duct work? This is how deep of a base kit you need.

We vent these using a Concentric Vent Kit also available from Miller.

Rod

What is a Concentric Vent Kit ? I would be using the roof. Do you still use the ac coil box for the unit to mount on?
Brian

bhough wrote:What is a Concentric Vent Kit ? I would be using the roof. Do you still use the ac coil box for the unit to mount on?
Brian

Disregard this subject, I found a diagram on it. I found out the MR4 series has the ECM.
Brian

OK good! Just make sure you can make the M4 fit. I believe the footprint is much wider than your CMF.

Good Luck with your project!

Rod

Better also be sure the blower motor is designed for a MH duct system.



Take care and best wishes,
Robert

Rod wrote:OK good! Just make sure you can make the M4 fit. I believe the footprint is much wider than your CMF.

Good Luck with your project!

Rod

Thanks, but I'm not sold on the M4 totally. I agree with you on the best/simple replacement the M3. My utility closet is tight & also 1/2 of the space is used for an entryway to the attic. I don't know about the cost difference between them. I can still get a $100. Rebate on the M3.
Brian

Hey again,


Not sure about the M4 but the M3 Has a promotional 5 year warranty on it right now. M3 is a good unit. I actually heat my shop with one.

Rod

Did you ever see this Miller? Which model is it? The seller claims it is a ac-combo & came out of a 2005 modular home.[img][img]userpix/4832_combo_1.jpg[/img]
Brian

bhough wrote:Did you ever see this Miller? Which model is it? The seller claims it is a ac-combo & came out of a 2005 modular home.
Brian

Another view.

Looks like a M1 series apprx 80% model. Its A/C compatible but does it include coil/condensor & the other items needed for the install.

If you can get model & serial # we can tell you more.

Rod