Radiant bathroom floor and auxiliary heat in the master of our PGH
Hi all–I’ve got a couple of questions regarding HVAC in my Pretty Good House (PGH). As you may recall, I built a PGH a little over a year ago and many of you contributed wonderful advice to my queries. We had a nice discussion on how best to heat my house and I decided to go with a single minisplit and a natural gas, heater rated fireplace. This system has worked well for most of the house, save the master bedroom. As you can see from the schematic below, we just don’t get a lot of heat into the master bedroom and, when it gets real cold outside (say below freezing), the bedroom is quite cold. Also, we installed electric radiant heat in our master bath, but we rarely use it. I could use your advice regarding the following:
1. I prewired the master for some kind of heater, and now it’s time to decide. It was actually set up for another small minisplit, but I think it would be too loud for a bedroom. So, for this 14’x15′ room with concrete floors, what type of heater would you recommend that would balance comfort, energy efficiency, and cost? Natural gas heater? Cove heater? Wall heater?
2. As I mentioned, we rarely use our master bath heated floor for two reasons: we’re not in the room very often and the cost of running this system is unknown–that’s where my question comes in. So, is it more efficient to turn the heat on, to say 70, and leave it on? Or, is it better to turn it on and off–using the timer thermostat that we have set up. We’ve found that 70 degrees is quite comfy–you can certainly tell the difference. Is there any way to calculate what it costs to run this system? I’m reluctant to add to our heating costs if this system is expensive relative to how much we use it.
Sure would appreciate any insight and advice you all have on these issues. Looking forward to an informative discussion.
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