MD Power Unit questions

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amtraksebo1997

Well-known member
Joined
Feb 13, 2022
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379
Location
Vacmasterthegreats basement
I'm considering potentially putting an MD Central Vacuum unit in my home. I'm thinking about it being either a low-end FLo-Master or Modern Day unit, but I can't decipher the differences between the two lines. Also, I'm worried about the units being really loud, as they'd be going in my laundry room, since I don't have a garage or basement. What are their decibel counts at the power unit? Also, I'm not sure if my laundry room's breaker could handle the unit if anything else (I.e., the washer and/or dryer) were also running off of it simultaneously. I'm not an electrician, so I'm not entirely sure how any of the electrical side works.

Could anybody provide some insight?
 
Likely

It'll run on a 220 line needing it's own disconnect.
If it's 110 it will like be high amperage and trip the breaker.
 
MD units

The flomaster line uses flow through motors which means they use the same air that is used to carry away what is vacuumed up. The air goes through the motor after it's filtered of course. As far as I know, the modern day series uses bypass motors, the silent master series uses bypass motors as well.
Mike
 
n0oxy

I see, so if I were to get an MD, I'd want to get one of those.

Now I still have some other questions

1. What is the decibel rating for these machine when you're in front of them?

2. Will one of the smaller Modern Days work off of a 15-20 amp shared circuit?
 
The dB rating of the F650 and F700 is 64. This is measured at six feet away and 6-feet high with a series of devices in accordance to an ASTM test. These units use thru flo motors and should be on a dedicated 20 Amp circuit. (But I have seen them often run fine on a 15 Amp.) The M715 used a horned bypass motor that is harder to quiet down at 76 dB and really should be on a 20Amp circuit. You could share the circuit but need to be aware when you are running it just in case it pops. But don't put it on a circuit with a freezer as this could be costly if both started at the same time and blew the circuit if it was not reset soon!
 
My grandparent's VacuMaid would occasionally shut off on you while you're in the middle of vacuuming. But they have two fridge/freezers out in the garage next to the power unit so that actually makes sense.
 

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