HomeAdvisor’s Tankless Water Heater Cost Guide gives the average prices for electric and gas systems, installation, replacement, and maintenance as well as cost comparisons fornds like Rinnai, AO Smith and Polaris..CostOwl.com Find out how much your next purchase or service will cost. Approximate pricing data for hundreds of topics including home improvement and insurance. View all categories.HomeAdvisor’s Water Heater Cost Guide lists pricesociated with installing or replacing a water heater including labor and materials, as reported by HomeAdvisor customers..Standard copper water cylinders are available for around and a thermostat for the cylinder costs under . For the total job excluding the tank, you should expect your plumber to charge you around ..How much replacing a water heater should cost. Average costs and comments from CostHelper’s team of professional journalists and community of users. With all needed parts and labor, hiring a plumber to install a traditional gas water heater costs $ $, or more, depending on capacity with gallons the most common sizes length of warranty typi.y years and the amount .Interested in water heater prices? The cost for a plumber to install a water heater includes required permits and labor, which varies based on type of heater and your home’s plumbing..To offset the cost of air conditioning, it’s possible to find rebates or tax breaks from federal or statecies. Unfortunately, federal tax credits expired at the end of for residential systems that are Energy Star rated and aren’t part of a new home build..A home equity line of credit HELOC is a great way to pay for improvements like a tankless water heater. Check out our guide to finding your best rate on a HELOC Electric or gas? How much does a tankless water heater cost? The answer depends on whether you choose an electric or a gas model..How Much Does a Solar Water Heater Cost? Compared to p.ovoltaics that could power a whole house, is installing a solar water heater still cost effective?.How Much Does it Cost to Replace a Water Heater? Posted.