where to buy a gas heater?

[The Duck]

Depends on what you mean by large. There are seasonally ones like these that have three elements for 5,10 and 15k BTU output. Check Mega and Comercial [don’t go in the Spring as those tend to be returns which they go ahead and resell anyway] Priced around 2500 pesos. If not seen in GTO go to Home Depot in Leon or try MercadoLibre search for calentador de gas.

The heaters do not come with tanks which are around 400-500MN. You can have a tank filled/refilled with the gas guy on your street which will require a 24hr turnaround [good idea to invest in a 2nd tank] or go out to the LPG station across from the Coke plant and Telmex