We installed a hydronic radiant floor into our new remodeled 1800 sq ft home in Seattle, WA. The flooring is pex with a 1-1/2" layer of thin concrete. We used an Electro-Boiler EB-MA-15 and have 3 separate zones. The construction is 6" walls with R-21 in the walls and R-38 in the ceiling.

The original house was a summer cottage at 710 sq ft with no insulation. We used 2-3 space heaters to heat the house and the monthly electric bill was never more than $ 200. We have relatively low electric rates compared with the rest of the nation.

We NEVER expected that it would cost $ 600 per month to heat this house even in the coldest month. Last month's lows were down to 20 with highs in the 40's. we are now back up to 30 lows with 50's during the day. The elec co says the system is still kicking all day long.

We called the plumber and he says the costs are high because we dont have drywall yet. I cannot believe drywall will bring that cost down.

Can anyone (with knowledge in this area) shed any light on this?

I'm about ready to shut the darn thing down and start all over.

Thanks for any info

I think you'll see a savings when your project is done.

I'm guessing you have a 3 element, 15KW boiler, same as ours.

As long as it isn't overheating the room, it is what it is. They are 100% efficient.