This heater was shipped within 3 business days and I had the electrical plug receptacle for it installed in one hour, so I was able to get my one car garage/shop heated with this NewAir G56 from 34��_ to 60��_ within one hour! It appears to only use 5.6 KWs of electricity for only $0.67 per hour. I couldn't be happier with the NewAir G56 considering I live in Colorado with 30 of snow on the ground, with outside temperatures in the teens , and Air & Water's speedy delivery of this heater. Thanks.