Yoga Studio

[axlegrinder]

I am renovating a room into a yoga studio that requires a room temp of 100 degrees F. Its called a hotbox.

The room has a existing rooftop unit, however the burner is larger than required.

If I return air through the rooftop unit, [the burner has a delta T of 65 deg. F], the discharge temp will be 165 deg F (based on a return air temp of 100 deg F). The unit has a thermal cutout set at 150 degrees F, so I believe the unit will shutdown.

I am trying to make this unit work somehow. A couple of things:

- if the room setpoint is 100 deg F, the return air temp will be less than 100 deg F (based on heat given up through the room), however, the room is well insulated (we are using freezer panels) so I don't think that much heat will be given up.

- I am using about 30% outdoor air which helps in the wintertime to lower the mixed air temp to the heat exchanger

I am looking at ways of making things work, but I am pretty sure there are no options (especially in the summertime).

Any ideas?

 

[DonPhillips]

I saw someone use electric radiant heat panels on its own thermostat to maintain the temperature.



Don Phillips

http://worthingtonengineering.com

 

[trashcanman]

I agree with Don above. Electric heat is the way to go, either with radiant panels or a duct heating coil. The gas burner is just too much. It is swatting a fly with a sledge hammer.

 

[MintJulep]

Or something interesting with a small heat pump with two condenser coils.

Evaporator coil for humidity control. One condenser coil in series with the evaporator for reheat. Second condenser outside to reject anything left over.

 

[lownox]

Gas burner is to much???? Heat is heat and there are plenty of options regarding modulating gas heaters. However, for this situation... the electric heat option is probably the easiest to implement.

 

[cry22]

A gas-fired tankless water heater with in-line circulating pump and fin-tube radiators with 3-way valve on pump suction is an option using gas to provide independent supplemental heat.
Check out

http://www.takagi.com

japanese manufacturer.
They offer 85 % efficiency water heaters and they are proven to be work horses. I have such a water heater that I use for domestic water and it works great, highly reliable.
I think you can find them in a condensing type model as well (mainly european models).

 

[lowedogg]

moving more air would result in a lower delta T. can you re-sheave the fan to move more air? increase the OA percentage to keep the room temp constant. not the most energy friendly, but maybe the cheapest solution.