Please take these things into consideration before you decide to diy.
Tankless gas water heater installation requirements.
A tank type water heater and a tankless or demand water heater for.
Build a platform with 2 x 4 inch pieces of lumber that will allow you to mount the new tankless water heater about four inches from the wall.
With so many types of electric tankless water heater it s obvious the installation process can t be exactly generalized.
Restrictions on gas fueled tankless water heaters no gas appliance may be located in a room used.
Vent termination all tankless water heater vents must terminate at least 4 feet from a property line.
This ef rating is based on test procedures developed by the u s.
Ok so san jose has the following requirements for where to install the tankless water heater.
Choose a location for the new water heater that will allow you to vent it to the outside easily.
And so some manufacturers don t recommend diy installation.
As a general rule any gas heater which is tankless uses combustion air must have a minimum area of 10 000 cu.
The models which need combustion air from the outside are required to have a second hose which is supposed to be put in.
Plumbing the most important skill is needed for working with both gas and water lines installing fixtures and ensuring there are no potential leaks or pressure issues.
Enclosed areas just as closets might need air ducts and extra air inlets.
Tankless water heaters generally require larger diameter gas supply lines higher voltage power supply if contemplating electric on demand dedicated special stainless steel flue known as category ii iii or iv or larger diameter exhaust system.
If reticulating pump in system.
Insulation is applied to the entire loop.
Today tankless water heater energy factors range between 64 and 91 for gas fired models and up to 99 for electric models.
Mount the tankless water heater securely to the platform.
Electrical even gas water heaters have electrical parts and need to be hooked up to your breaker box.
For both gas and electric models a tankless water heater s overall energy efficiency is measured using an energy factor ef rating.
Around the water heater.