Seizing a Munchkin

lolo

Hi John,
I am renovating my house and I am going to install a munchkin or trinity.
I have a couple of questions about seizing the boiler:
Heat loss calculation for this house when I will finish renovating it (next spring) is 65k btu for heat.
As the house it is right now, it calls for 135k btus (2 floors + attic and basement, 2 floors only 69k).
I think the right boiler would be a munchkin 80, that can modulate down to 25k (do you think so ??).
What would be the disadvantages of installing a 150k unit and have it heating a house that would usually need around 35-65k (2 floors - or 2 floors plus attic and basement)?
The reason I am thinking about a 150 unit is because price wise the difference is minimal, and I have more choices (not everybrand sells an 80), and I would have a boiler that is big enough if I built an addition or heated garage, or whatever.
Hotwater would be an indirect 45 gallon, as we are 3 people in the house.
Any advice as whether going with a 150 or an 80 wouldbe greatly appreciate it.
Would I expend more in gas when the 150 is running down to 45k in the summer to just make hot water? or would I be fine since this units are more efficient when they run on the low side.
thanks in advance,
lolo

Guy_5

Sizing

Just to add another consideration- Munchkin makes a model T-80 which is a wall hung unit that ramps up to 110,000 BTUs on a call from the indirect water heater. Another advantage is that it will vent in 2 inch PVC.
I am a little concerned about the drastic change in the efficiency of your home, so to be perfectly honest, I would stick with the 140,000 BTU unit. It is better to err on the warm side.

Guy

Dave_13

????

Question is..... where can you find these little Munchkins?? Supplier here in WNY is having a hard enough time getting 80M's.......

lolo

insulating a house

The house is ballon construction with clapboard instead of cdx on the outside=cold drafts running through the walls.
I am insulating the house from the outside with a continuous layer of 3" rigid foam (polisycianurate), the roof is getting 4 1/2" of foam, with a 1" air gap in between.
I have worked on this in germany before, and the numbers I have posted are modest. Five and six story building in germany cut their bills in half at least. Putting new windows and doors that are 100% airtight (no double hungs, and doors that lock onto the frame every 6", or so all around), cuts energy concumption to one third.
There is also something use overthere every where that it is imposible to find overhere: cast aluminum radiators. They are good looking and their btu output much higher than cast iron, or steel, so they take less spaces, they react faster, and you deliver the btu where you want them, in the room, not in the walls.

jeff cook

The T80 would be my choice of size

this one has a five to one turn down not like the 80M that only has a three to one turn down so in your case you want to be ble to get in to the low firing rate with out short cyceling. On the top end you will be ok and if you go to an indirect you will get it blasted with 110 BTU'S in prioity if using the Vision one package.
We are adding on to the assyembly line and re configuring it so as to increase production. The line is nearly complete and all should see better availablilty. Remember the Munchkin is in such high demand that we as a Co.had to shift gears midstream to meat the demand and this has taken time we had to move a few large departments to an other building that had to be built specificly to house the departments moved in order to make room for the improved assyembly lines. Youe patients is appreciated and thank you for your support.

Joh n Brickey

I agree, where do you get them from. I had to beg my supplier and they finnally sent 4 80M units. I bought all 4 on the spot. I was told that the 140 won't be shipped until the 19th of Jan 04.

lolo

when?

Ok, thanks for your response,
Since it seems you work for munchkin,could you tell me a most accurate availability schedule?
I would like to wait, but I need to know a real time frame.
Will they really be available at the end of January? the wall hang, I mean?
thanks, for your answers.