If you are keeping the same appliances or even upgrading them (more efficient models these days) I would say keep the 100A service.

By doing so, you can advertise it as having NEW, ENERGY EFFICIENT, appliances, water heater, heating and air conditioning.

Ditto, it has certain efficiency points as Anson said.

Sorry for double Post....Dev, what method would you say has worked more efficiently for leads in the long-run....direct mail or SEO/website leads?

Steve,We have removed three chimneys in the past year ... and there is one more on our "we could make better use of the space" list.If your gas furnace is a recent, high-efficiency model, you should be able direct exhaust it out through the wall using {C}PVC piping ... you may be able to direct vent it as well so it's not sucking warm air from the house for combustion.We demolished all three of our chimneys on our own (myself one one, along with my "handy-man" on the others).

They are pretty much throwaway low efficiency units.

Markets aren't always completely efficient; especially in real estate.I do, however, appreciate everyone's willingness to caution people to be conservative.

Read about why people steal from the workplace for a better understanding of this reasoning.Finally, the old saying, you get what you pay for.

Commercial plants are 100% power all the time and very close to carnot efficiency.

However replacing the unit with a high efficiency gas unit you are looking around $6k.