do you know of any that do not need to be vented?
i did a stupid thing and bought a tub thats damn near the size of a pool, and my tank cant keep up i use at least two full tanks, ouch when the power bill comes in:( and this house is old and has enough holes in it. i would rather not add another by venting:)
thank you.

I need to replace my water heater and am considering a tankless model. My greatest concern is that they all require special all-stainless steel exhaust ventilation. Not only is this impractical for my installation environment, but it suggests that the appliance generates so much waste heat that it's not so energy efficient after all. Are there any natural gas tankless water heaters that can use an existing galvanized steel exhaust vent?

The hot water heater is going in the basement and since the kitchen sink is on an outside wall on the first floor I want to get the hot water supply as close to the demand as possible. Would it be ok to locate the hot water heater directly beneath the demand even if it is on an outside wall and near the basement door outside entrance? Or should I move the hot water heater as far away from any drafts and outside walls as I can get it which would take that much longer for heated water to reach its destination?

I'm considering switching from our 50 gal hot water heater to a tankless. For those of you who have done this, how much did it cost and are you seeing savings on your gas bill? At our current usage, a 50 gal tank takes care of one load of dishs, two loads of laundry and two showers (10-15 minutes long) before we start to loose hot water.

The washer is in the detached garage that is too far from the house to use the hot waterheater there.

For washing whites I would like to add a hot water heater, tankless makes the most sense since its only once a week. Not sure how much GPM a washing machine requires. Its a maytag neptune front loader with digital screen.

HI, I am wondering if the fuel and the cost are the same or similar (is the propane used for a home lpg hot water heater the same as used in the small white tanks we refill?) thanks jerry
thanks everyone. To propane man...the tank I refererred to came with the grill, it is an outdoor grill with little lava type rocks?you have heard of these? I did not have to change the connection at all it came set up.

Hot water should be instant at every faucet and the shower will not lose it temperature/pressure when a kitchen faucet is turned on. I plan to use a TANKLESS water heater

I was unable to pay my pg&e bill and they shut off my gas. I'm not thinking of trying to use propane in place of natural gas for all of my gas appliances or anything. And I would only turn the propane on when I needed hot water for a shower or something and then I'd shut it off. It would only be occasionally if it is able to work.

I have replaced my house hot water heater with a tankless hot water heater. I still have an old oil burning hot water heater for my baseboard heat. I figure that a gallon of water will go about 294 ft. in 1/2 in. copper tube. Can I replace the oil burning water heater with a 20 or 40 gallon electric heater? If so, suggestions on how or what not to do?
I thought about that, but paying nearly 0 USD for a month and a half of a fossil fuel is far more than the electric would be. Plus, it is for heat only and it is currently an oil water heater being used. Is there a difference?