If you are using the word costs as a noun, then it is plural. You would say the costs are..., never the costs is.... If you are using it as a verb, then it refers to a singular object: It costs a lot of money They cost a lot of money.
The average solar water heating system can cost between $6,300 and $7,200 depending on the tank size and need.We help to make getting a solar water heating system installed in your home both easy and affordable.We provide two rebates to help you offset costs:he Cost of a Solar Water Heating System. The average solar water heating system can cost between $6,300 and $7,200 depending on the tank size and need. We help to make getting a solar water heating system installed in your home both easy and affordable. We provide two rebates to help you offset costs:
Typical costs: 1  Expect to pay about $6-$16 a square foot for a professionally installed hydronic (hot water) radiant floor heating system, or $9,000-$22,500 or more for a 1,500 square foot home, depending on local rates, the number of temperature zones and the overall size of the system.ypical costs: 1  Expect to pay about $6-$16 a square foot for a professionally installed hydronic (hot water) radiant floor heating system, or $9,000-$22,500 or more for a 1,500 square foot home, depending on local rates, the number of temperature zones and the overall size of the system.