steam system tour

Thank you Frank.

That's the model I'm going with. And since it's only me living here 50 gallons will be more than enough capacity for a once a day shower and laundry once a week and occasionally running the dishwasher. I've talked to multiple people who have them and they are very pleased with them. Never run out of hot water and very efficient to run. The problem I have with the domestic coil is when the boiler isn't steaming and is at 180 for the hot water I do run out of hot water, water will be great for a few minutes then it gets lukewarm and then it takes another 10 or 15 minutes to get really good hot water again in the shower. However when she's steaming hot water is great. NPU is great to deal with. I only get electricity from them though. Where I'm at there's no natural gas city water or sewer.

I'm going to completely abandon the domestic coil, the house used to have a traditional hot water tank that lived in between the oil tank and boiler. I already have 10 gauge power to the spot where it would be installed. I think with me being here by myself, it would be very efficient running it either in energy saver or heat pump only mode. One of my friends his only costs him about $5 or $10 a month in electricity. I don't mind having the boiler as a cold start. I don't want to burn oil in the summertime just for hot water. Demand for hot water here isn't great at all. I would imagine in the winter time I would leave it in energy saver mode and then summertime switch to heat pump only. The slow recovery time of heat pump only mode wouldn't bother me at all in the summer time

I will also have a talk with my plumber buddy Adam when he and I do the boiler maintenance. I'll see what his suggestion would be in terms of having the coil for a backup if the HPWH decides to have issues

I've traced the 10/2 wire back to the panel and it is just dead ended inside of the panel so I'll pull out the 20 amp double pole breaker that used to feed the AC receptacle in the living room which never gets used (I have a 10K BTU window unit which is 120v now) and put in the appropriately sized breaker which is 30 amps. The 20 amp 240 volt receptacle in the living room that was for the air conditioner I've removed the receptacle and just put a blank cover plate over the box as well. I've already run a condensate line over to the sump pit with 3/4" PEX and I'm just going to use gravity to get it there. I've run it along the wet return for the steam system which never gets more than warm during an extended heat call. I think for me and my demand for hot water which is just a 10 to 15 minute shower once a day and load of laundry about once a week and running the dishwasher maybe once a week as well, running it in heat pump only mode or energy saver mode would be best for me. One of my friends who lives one town over and has eversource for electricity his only costs him about $5 or $10 a month in electricity. I think mine would be similar. My most expensive electric bill in the summertime is about $180 running a couple of window air conditioners upstairs set at 72° and I only run the one in the living room as needed.