When installing a gas furnace or gas boiler, a Wesco Energy technician can evaluate your current situation and make an efficient and affordable recommendation based on all the variables of your home. Size is a big factor. Too big or too small and the gas furnace/boiler will overwork. Too small and it will struggle to keep up with demand. Too big and it will work more than necessary, therefore wasting heat when not needed. Why it’s so important to consult with a Wesco Energy technician on the best model/size for your home. A consideration is the efficiency of the unit. Although more efficient gas boilers/furnaces are more expensive, the savings are well worth it as you can re-coupe the extra money in a reasonable amount of time. The more efficient the unit, the lesser the emission which is a great environmental gain. Also a consideration is replacing an older less efficient unit for a newer one.