This is not accurate information. Tankless water heaters will cost at least 1,000.00 for the unit without installation. In the southern states installation cost's are less because they hang on the outside of the house. In the midwest costs run much more because they need to be installed inside the homes to prevent freezing. Installation in the real world can run between $2,000.00 and $3,500.00 depending on where it needs to be installed and if the house is brick or stucco. Also if you currently have gas in the house and always remember you want to have soft water on these units due to lime problems if you live in an area with hard water. If you need a softener add more $$$$ to the equation. These are nice units they will supply you endless hot water to 2 or 3 fixtures at once depending upon the flow rates. If you are filling a large bathtub with a high flow rate faucet, this may be the only fixture you can run. The burner's in these units modulate from 17,000 btu to 199,000 btu. Normal 40 gal. gas heater has a 40,000 btu in it. If you have a family you won't be saving money, you will have the convenience of not running out of hot water, but your gas bill's may be higher. If you live alone you will save $$$$. Talk to a plumber to find out if it is the right application for you. 

More misinformation: In North Amrica, the south and west (not est and west) sides of a house receive the most solar exposure in the summer.

Also, experts don't recommend wind turbines anywhere where trees and buildings are within 200 feet, because these objects create turbulence that radically reduces power generation and increases wear and tear on the machinery. The photo of the rooftop turbine between two chimneys is a great example of what not to do! A turbine should be at least 30 feet above the roof.

Nearly all of these ideas cost a lot of money. For most people, they are impractical because of that reason.

I'm amazed when people like Jacques here says people can't afford upgrades that have a definite payback. Apparently no one has a concern when buying a new car, going on vacation, buying new clothes, going out to eat or smoking and/or drinking (or spending on anything else that depreciates or is consumed outright). But suggest some upfront cash (loans) for products that pay for themselves and all of a sudden consumers "can't" afford them. A good hot water solar system for a family of four should cost around 12-20k and show a payback in 3-7 yrs. Fed tax credit knocks off another 4-6k (no cap). Geothermal is higher upfront, longer payback BUT STILL PAYS FOR ITSELF in 5-10 years (with it's own 30%, no cap fed. tax credit as well). What's the return on investment (ROI) on a beer? Or a 34k Camry?

Hi Guys , i like the house it looks pretty. but is it suatable to hot clamite, between 30-45 degrees?

it is so it would be great