Pex Layout for Garage

[Rickcnc]

Any input on the attached layout? I downloaded the 30 day evaluation copy of loop cad and came up with this. Garage is detached 28X40X12, one large door and one man door, no windows. Floor is R10, Walls R21, ceiling R50. Still not sure what I going to use for a heat source, my only options are electric or propane.

 

[zutan]

I've done a handful of garage floors and the layout looks just fine.
Leave yourself a 5-8' "tail" on both supply and return ends because it makes manifold locating less restrictive.

As far as heating, propane has 91,500 BTU's a gallon. Electricity has 3413 BTU's a KWh.

As the heat source, a propane water heater that has an efficiency rating of 70% yields ~64,000 BTU's an hour. 64,000 / 3413 = 18.8 kilowatts.

That said, if a kilowatt costs 10 cents where you live it would take a $1.88 worth of electricity to equal a gallon of propane. Propane is around a $1.20 gallon where I live and electricity is 12 cents KWh.

 

[Rickcnc]

I've done a handful of garage floors and the layout looks just fine.
Leave yourself a 5-8' "tail" on both supply and return ends because it makes manifold locating less restrictive.

As far as heating, propane has 91,500 BTU's a gallon. Electricity has 3413 BTU's a KWh.

As the heat source, a propane water heater that has an efficiency rating of 70% yields ~64,000 BTU's an hour. 64,000 / 3413 = 18.8 kilowatts.

That said, if a kilowatt costs 10 cents where you live it would take a $1.88 worth of electricity to equal a gallon of propane. Propane is around a $1.20 gallon where I live and electricity is 12 cents KWh.

Thanks for the input
Electrical fees here with the extras , Delivery charges, Regulatory charges, Debt retirement charges, and taxes works out to 18 cents KWH. Then we get a 10% credit called Clean Energy Benefit