I got 2 a/c's units and just wandering if it would be beneficial to change one a/c out and have one with an heater and a/c together. I know it use less propane but is the cost justified. Thanks Ran...
Payback is more or less impossible. If a unit bites the dust--it may be worth the upgrade. For now, see if you can add a heat strip. That costs about $60.
Another alternative is to pick up a $20 heater from Walmart. Do upgrade the outlet you plan to use it with.
Someone mentioned the Cheap Heat system. Be aware that on the lowest setting it can not be run on a 15 amp circuit. Pay back time is even more astronomical than changing out to a heat pump.