Standard meter will suffice, need to know pressure from meter to house. Size pipe appropriately for gas pressure coming into house X distance to water heater. Gas company or plumber should be able to help with this calculation.
Check with your utility company; you may have other gas utilities in use as well.
You'll need to be far more specific. What sort of heater? What kind of controls does it have? Thermostat settings?
At a minimum you would need a 400K btu gas heater. This pool is larger than a 20 x 40' pool or 800 sq. ft. Many things dictate the size or sizing of a pool heater such as the surface area of the pool, the size of the gas line from the meter to the heater, the distance of the run from the meter to the heater, the size or capacity of the gas meter, etc. Proper sizing is a must if your heater is to run at optimum standards.
Yes you need to shut off the Main water valve. Usually found in the basement or outside the house near the meter. Also you need to shut off the Gas valve located at the water heater, or the Breaker located in the breaker box/ fuse panel. Sometimes the water heater will have its own Switch box, located on the power wire
"No they do not. I had 2 hermit crabs and they lived for 5 years in the coldest room in the house" well, it depends. they need it to be no colder than 72 degrees Fahrenheit and no warmer than 82. if you need a heater to do that, then yes.
If you have a basement, it will be on the basement wall closest to the street. If you are on a slab, it is most likely next to the water heater. There will be a water meter between the house and the street, there should be a valve there, but it may need a shaped key to turn it and they can be tight.
read the pool heaters manual.
You need to determine the: gas heater size for the specific pool/spa (with spa use no less than 400,000 BTU). ( how fast do you want the spa to heat to temp?) length of the gas run from the gas meter to the heater pad. size of the gas meter size of the gas pipe at a minimum. Ken
400,000 btu's minimum ...pat What Pat is not considering is the size of your gas meter or the gas line to the equipment pad if there is one. If you are starting from scratch you still need to know the gas meter size and the length and diameter of the gas run. Absolutely critical to heater installations. Because of the existing gas line and meter you may be limited as to the size or BTU of the heater. k
You may have a restriction in your hot water heater exit pipes. There may be corrosion. How old is the house and how old is the hot water heater? What type of pipe is there going out of the hot water heater? You need to know this to fix the problem yourself without hiring a plumber.
No, you only need gas for a gas water heater.
if your heater just went out in your house and you need a really good electrical furnace you should really consider getting a whole new furnace from a hardware store or a heater store.
form_title= Propane Heaters form_header= Stay warm with a propane heater. What size heater do you need?*= _  What is the square footage of your home?*= _  Will you heat your entire house with propane?*= () Yes () No
You need the owners or installers manual, jumper lead wire set - not car battery jumpers -- electricians meter, spare parts. All the above and more depends whether you have a milivolt or electronic controlled gas heater. K
The answer will depend onthe ambient temperature, and other atmospheric conditions,the temperature to which the house is heated, andthe insulation of the various materials in the house.
form_title= Tankless Water Heater form_header= Repair or install a tankless water heater in your home! Do you need a tankless water heater repaired or installed?*= () Repaired () Installed What size water heater do you need?*= _  What is your budget on the water heater?*= _ 
how can i get the help
you need to add two feet to get a meter
There is a product called PLUG ALIVE that has a red LED light turn on to indicate your block heater is working immediately. You can also use a meter to measure the resistance or current draw if it is working. It is not as convenience or easy to use the meter all the time especially need to stay outside in the cold temperature. However the block heater element can break or crack at anytime therefore need to check all the time. It's easier to use the PLUG ALIVE tester. Google it to find where you can buy on There is also a product called PowerCheck. Check eBay and search for "block heater status"
Yes, a plumber would be able to help you with hot water heater problems. Hot water heaters have to do with water in your house and is a part of the plumbing.
A single tankless water heater will not cope with all that.
This depends on other factors. What is the outside temperature? What do you want for the inside temperature? How tall is the house? How is it constructed?
That's a great question! Actually i would keep a heater in handy just in case if the temp goes down anyway. also i would keep it for the winter, but just a small heater.