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[ST98]

Well I had a plan if how I was doing my garage until I went to my dealer the other night. I planned on pressurizing it. Three zones, two zone with one each 100k blowers and one zone with a loop of 20' baseboard. I thought I would put a pump on the furnace, come in hit my he and then back out. From my he go to an expansion tank, manifold and the three circulators. Also have my pressure relief and water feed in the system also.

They tell me don't waste your money on all that and since the height of my water will be higher than the height of my circulator in the garage, and within 40 feet of my owb, dont put pump on the OWB. When I come in the garage just go to my manifold and then my circulators and just out a manual bleeder at the highest point.  Just keep my garage circulators lower than my outside water.

Now I'm really confused and I haven't even planned out the furnace in the house.  Any ideas what way is the best way to go?

[johnybcold]

I went back and forth over pressurizing or not, in the end I did unpressurized , my thought was less heat loss because now I do not have a heat exchanger , in the summer I represurize it to make hit water

[willieG]

im not sure what type of garage you have nor how  much youwant to heat it.

my 30x40 garage is a detatched building and i normally only use it on weekends in the sinter so i made it a closes loop system that holds roughly 6 gallons of mixed antifreeze. doing this gives me piece of mind that i can shut this system off all week, turn it on friday night and on staurday morning it is nice and toasty in there. there is no chance of it freezing even in a power failure.

i guess there are many who would vote for and  against a closes loop but for me the choice was easy. the decision is entirely up to you. it looks as though you have a couple of nay votes so far...now you have one yea

[ST98]

It is a detached 40 by 48 pole barn with some loft. My plan is to keep it heated all the time as there is a separate enclosed office  in there to but it would be a nice option if I go away to shut it off.  Plus it will heat the house.  I start getting fouled up where it comes to pump size. My numbers come up to bigger pumps but my friend running the same blowers has Taco 007 and has tons of heat but that's with a pressurized system.

It's a short run maybe 40' to the garage from the owb. The height of the top of the water in the OWB should be about two feet higher than the height of the circulators in the garage. It comes to the manifold and then to the pumps and them one loop would be 50' for the office which could be a pretty small pump. Where it goes out to the 100k blowers it's maybe 125 round trip each with a few 90's. I'd like to stick with Taco pumps cause that is what's in the house.  Any idea on pump sizing for the blowers?  Do I need a pump on the OWB? 

I have the pump figured to send it to the house due to how long of a run it is.

Thanks

[Scott7m]

Don't fall into the myth that my house is warm so my pump is being enough theory. 

007 pumps to me are over used, often times they are to small and sure cant handle much head pressure

When were talking about distances and such like your referring to I'd be looking more at the 011 in taco


As far as unpressurized vs pressurized I'm not fully understanding this water level above and below and all that, but if you pressurized parts where u were concerned of freezing it would be beneficial to run it as a closed loop with antifreeze mixture

[ST98]

Scott, if I understood correctly if the water at your OWB was higher than your indoor circulator you didn't need a pump on the OWB if the distance was less than 50 feet.  Not sure if I followed all that correctly. I have to have a pump on the OWB for the house so it doesn't matter if I have another one on it for the garage. I think what my dealer was trying to do was save me money.  I'd rather do it right once than pay twice, I have a yard full of those decisions.

[Scott7m]

Yea I Donno, there is a lot of different ways to do things but I for one almost always put the pump on the boiler itself.  I understand some folks don't but it has worked well for me

[willieG]

my pump is in the basement, it is about 4 feet lower than the OWB and it is 250 feet from the OWB it is starting its 12th year and i have never started it once in the summer. i start it when the heating season begins and shut it off when it is over.

[Scott7m]

my pump is in the basement, it is about 4 feet lower than the OWB and it is 250 feet from the OWB it is starting its 12th year and i have never started it once in the summer. i start it when the heating season begins and shut it off when it is over.

Yep I don't buy into putting it on a timer and all that blah blah blah lol

[MattyNH]

 I never run my pump during the summer season..It doesn't go on till I start a fire in my boiler

[ST98]

Thanks for all the info. I'm going to do pressurized. What do folks use to get the air out of the system?  You have the expansion tank but is an air scoop used? 

Thanks

[MattyNH]

You would use a air vent..which is normally installed on top a air scoop..You can install a air vent anywhere really with out the air scoop...Just need the right fitting so it can screw in..Air vents are cheap enough to buy..Pressurized OWB owner here

[slimjim]

Set up purge tees just before a ball valve just like you would do on any return loop to bleed the air out initially