Hey guys, I could use a little help here. Fair warning it's a long post so unless you're interested in HVAC you might want to skip the thread.
I'm finally getting to build a workshop, took a couple years of restraining the gun monkey to save up the cash and I'm ready to build. I'm ordering a 40x60x18 ft steel building, r-19 in the ceiling of the shop, r-16 in the walls, with heavy insulated doors. Inside the shop I'm building out an office area of about 400 sq ft, I'll insulate that as well so I can heat/cool the office with a small split unit to different temps than the shop floor.
I'm planning on a smart thermostat controlling the split unit in the office space, that's easy to figure out sizing, ability to learn when I'm in the office and start adjusting temp to save $ on the heating/cooling bill, etc.
For the larger shop workspace I'd like to go as energy efficient as I can so I want to install a set of powered louvers for intake, an exhaust fan with louver and either a single large split, or maybe 2 smaller splits for heat/ac. Something along the lines of this is what I have in mind right now for the hvac unit.
https://www.heatandcool.com/60-000-...d-split-air-conditioner-heat-pump-system.html
What I want to do is wire everything up to a smart enough controller that it can do the following take the temp inside the building and the temp outside the building and be smart enough to run some basic logic like:
1) If outside temp is 60, the inside temp is 50 and the desired temp is 55 then open the louvers and run the fan till the inside temp = 55. It's warmer outside then the setpoint I have for inside so bring outside air in
2) If outside temp is 40, the inside temp is 50 and the desired temp is 55 then run the heat pump. It's colder outside than my setpoint so heat up the air in the shop.
3) If outside temp is 60, the inside temp is 80 and the desired temp is 70 then open the louvers and run the fan till the inside temp = 70. It's cooler outside than inside so bring in outside air till it cools down to my setpoint.
4) If outside temp is 90, the inside temp is 80 and the desired temp is 75 then run the ac till it gets to be 75 in the building. It's too hot to cool down by bringing outside air in, so cool the inside air.
5) Have a manual bypass mode where I can override the automatic settings and turn on the fans, run the ac, run the heater, etc as I want (and if this can be on a timer where I don't leave the AC run down to 60 in the middle of the summer for a week when I forget to change it back it would be even better!).
With our weather here over 1/2 the year time wise I really wont need the system to do anything but cycle on/off the fan and louvers to keep comfortable temps in the shop so there's a lot of cost savings in not running traditional HVAC 24x7. I know it's not 100% ideal humidity wise but it's way better than what most people do in just running heat/air when they're in the shop and letting it sweat and condense inside the rest of the time. I can always add in a dehumidifier into the mix if I see it's needed.
Anyone tackled this before, seen a controller that can do that, etc?
Thanks
I'm finally getting to build a workshop, took a couple years of restraining the gun monkey to save up the cash and I'm ready to build. I'm ordering a 40x60x18 ft steel building, r-19 in the ceiling of the shop, r-16 in the walls, with heavy insulated doors. Inside the shop I'm building out an office area of about 400 sq ft, I'll insulate that as well so I can heat/cool the office with a small split unit to different temps than the shop floor.
I'm planning on a smart thermostat controlling the split unit in the office space, that's easy to figure out sizing, ability to learn when I'm in the office and start adjusting temp to save $ on the heating/cooling bill, etc.
For the larger shop workspace I'd like to go as energy efficient as I can so I want to install a set of powered louvers for intake, an exhaust fan with louver and either a single large split, or maybe 2 smaller splits for heat/ac. Something along the lines of this is what I have in mind right now for the hvac unit.
https://www.heatandcool.com/60-000-...d-split-air-conditioner-heat-pump-system.html
What I want to do is wire everything up to a smart enough controller that it can do the following take the temp inside the building and the temp outside the building and be smart enough to run some basic logic like:
1) If outside temp is 60, the inside temp is 50 and the desired temp is 55 then open the louvers and run the fan till the inside temp = 55. It's warmer outside then the setpoint I have for inside so bring outside air in
2) If outside temp is 40, the inside temp is 50 and the desired temp is 55 then run the heat pump. It's colder outside than my setpoint so heat up the air in the shop.
3) If outside temp is 60, the inside temp is 80 and the desired temp is 70 then open the louvers and run the fan till the inside temp = 70. It's cooler outside than inside so bring in outside air till it cools down to my setpoint.
4) If outside temp is 90, the inside temp is 80 and the desired temp is 75 then run the ac till it gets to be 75 in the building. It's too hot to cool down by bringing outside air in, so cool the inside air.
5) Have a manual bypass mode where I can override the automatic settings and turn on the fans, run the ac, run the heater, etc as I want (and if this can be on a timer where I don't leave the AC run down to 60 in the middle of the summer for a week when I forget to change it back it would be even better!).
With our weather here over 1/2 the year time wise I really wont need the system to do anything but cycle on/off the fan and louvers to keep comfortable temps in the shop so there's a lot of cost savings in not running traditional HVAC 24x7. I know it's not 100% ideal humidity wise but it's way better than what most people do in just running heat/air when they're in the shop and letting it sweat and condense inside the rest of the time. I can always add in a dehumidifier into the mix if I see it's needed.
Anyone tackled this before, seen a controller that can do that, etc?
Thanks