Hello All -
The time has come to add on to my existing detached garage and I am planning a 20'x25'x9' space.
When I built the original 30'x40'x12' space radiant floor heat (or any heat) was out of the question due to budget constraints. I have since added a 60k btu 94% eff. propane furnace with a 2T A/C.
Now planning the addition, I am thinking again about radiant but confused over the options for a hot water source given the small space (500sq ft).
At a minimum the sheathing joints and framing gaps will be caulked and R13 batts installed, 2" R10 foam on the inside of the poured concrete foundation walls and 2" of R10 foam under the slab. Attic will receive 18" of blown in cellulose ~R60. There will be 1 8'x9' insulated overhead door.
I like the idea of radiant in the floor because this space will be used for a wash bay, fab area, snow covered daily driver parking and other "dirty" work where a warm floor would be ideal. Some painting and other automotive chemicals would be used in this area so "sealed" combustion is a factor.
For such a small space what hot water source would be ideal? Is this area small enough to use a standard tank-type water heater or is tankless still viable? Propane or electric?
I figure a two loop system would be ideal in this space (~500' of 1/2" piping on 12" centers) and running a simple online heat loss calc. says the space requires ~5000btu/hr @60F setpoint with 10F air and 30F soil temperatures.
Appreciate any feedback on this project (even if you tell me to forget the radiant and go with forced air). I am on a steep learning curve here and need to make a decision in the next few weeks.
Thanks!
MJ
The time has come to add on to my existing detached garage and I am planning a 20'x25'x9' space.
When I built the original 30'x40'x12' space radiant floor heat (or any heat) was out of the question due to budget constraints. I have since added a 60k btu 94% eff. propane furnace with a 2T A/C.
Now planning the addition, I am thinking again about radiant but confused over the options for a hot water source given the small space (500sq ft).
At a minimum the sheathing joints and framing gaps will be caulked and R13 batts installed, 2" R10 foam on the inside of the poured concrete foundation walls and 2" of R10 foam under the slab. Attic will receive 18" of blown in cellulose ~R60. There will be 1 8'x9' insulated overhead door.
I like the idea of radiant in the floor because this space will be used for a wash bay, fab area, snow covered daily driver parking and other "dirty" work where a warm floor would be ideal. Some painting and other automotive chemicals would be used in this area so "sealed" combustion is a factor.
For such a small space what hot water source would be ideal? Is this area small enough to use a standard tank-type water heater or is tankless still viable? Propane or electric?
I figure a two loop system would be ideal in this space (~500' of 1/2" piping on 12" centers) and running a simple online heat loss calc. says the space requires ~5000btu/hr @60F setpoint with 10F air and 30F soil temperatures.
Appreciate any feedback on this project (even if you tell me to forget the radiant and go with forced air). I am on a steep learning curve here and need to make a decision in the next few weeks.
Thanks!
MJ