"Mark" wrote in message
...

wrote in message

Lets say it saves £20 a year heating dhw only.

Energy Cost Savings and Return on Investment [ROI]:

. An average family of four uses 70 gallons of hot water per day -
. at a cost of $480 per year*
. The typical solar water heater will save 80% of heating costs -

It might do in Florida, not in cloudy northerly regions.

. or $384.00 per year
. A typical heater with hardware will cost:
. Do-it-yourself Kit - $1750
. Contractor installation - $2700
. The tax-free return on investment would be:
. Do-it-yourself Kit - 21.7% ROI [$384 / $1766]
. Contractor installation - 14.2% ROI [$384 / $2700]

*Based on 72°F incoming water heated to 140°F in Florida with an electric
rate of $0.09 per kilowatt plus standby heat loss from a new water heater.
Your savings may vary based on your usage, temperature, climate and
electric
rate.

Calculate your own Tax-Free Return On Investment [ROI]:

$ _____ Estimated Savings
$ _____ Divided by Unit Cost
%_____ Equals ROI
http://shop.solardirect.com/product_...roducts_id=188




-