This Sunpak gas wall mounted heater has a two stage wireless remote control and an output up to 34,000 BTUs.
Amazon.com: Martin Direct Vent Propane Wall Furnace Heater for Indoor Homes or Offices with Built-in Thermostat and Glass Panel, 20,000 BTU : Tools & Home Improvement
Empire Sr18T Vent Free Gas Heater With Thermostatic Control