It boggles my mind that people think 10 years is a long time. After installation, you pay each month (including financing) about what you were already paying anyway (probably less). You do it for 10 years, (especially with all the new government incentives, rebates, and low-interest financing now available) and after 10 years you're paying a ridiculously paltry amount for heat. Of course it makes sense. Think of the payback over 20 years once that loan is paid off! Even if you only end up paying even 1/2 of the normal cost over that period (including the cost of your system and electric), you're still saving substantially. I know not everyone lives in a home for that long, but seeing low energy bills does increase home values. I've seen homes sold almost immediately with their main advertising point being their geothermal system even in our horrible present climate while others still linger on the market. Not only that, but why not decrease your monthly bills slightly (before the loan is paid off)? Slightly lower bills, a higher sales price which will pay off the rest of that loan - still makes sense. We had someone come out to our house and they specifically calculated everything from current estimated heating costs, heating/cooling with geo, then savings/payback period. This was a full service option, including thermostats, etc. Finding that should not be difficult. One argument I saw above made no sense. If it really is worth insulating your home to use a normal system, it is a no-brainer to insulate your home using geo. Whether you decide to use geo or not, you can't say, "Well, normal is better, because we insulated, too." That makes no sense. Insulate either way. Then compare. The financial analysis does not make much sense, either. Yes, it would be wonderful if we could just stop paying the oil company, live without heat, and invest that money! Realistically, while you could want to put away the whole $25,000, you really are still using it for heat either way over those 14 years as projected. Geo, with the loan, electric, etc, will cost about the same each month as heat before the loan is paid off, so you can't just pretend that money could be invested elsewhere. Use it upfront with geo, use it over several years with oil, it makes no difference. That money is being spent on heat. Should it be spent on something worthwhile, or just, at the end of 10 years, have you still spending the same amount on more heat with oil? Geo will typically initially cost you a little less (including the loan and electricity) per month than you would be paying otherwise, then suddenly drop dramatically to only the cost of using the system as soon as that loan is paid off. That's money you would have spent anyway each month with your normal system (even though some of it went to financing, it is still less that what you would have paid for oil). Then suddenly, once the loan is gone, you actually DO have perhaps $1,000 a year in money saved that you can invest if you wish over 10 years. If, with financing costs, it does cost more per month than your normal heating system, that's one thing; but if not, the argument that it is wasting money is not valid. You're spending it anyway. Might as well spend it on something that will, in the future, save you tons of money. (Not just a little, a lot.)

I also have a TETCO heatpump that is suddenly resetting on the lowpressure lockout. I do have iron in my water and if possible would like to talk to you about how you have been maintaining your heatpump. Thank you!

Heat recovery units only work when reclaiming heat from showers (the hot water has to be going down the drain at the same time you are using hot water - the only time that happens is during a shower.) You will get more benefit from the heat pump water heater (will save you money on all your hot water, not just showers). In addition, it will provide some cooling / dehumidification of the space in which it is placed (basement - garage). The DOE projected annual cost to operate a heat pump water heater is the lowest of all water heaters except solar. (so slightly less than 92% gas tankless) Not making any endorsements, but this heater is a typical unit that has a DOE estimated cost of $110 a year. What's more is that there is often a large rebate from the power company on these units. Note: If your home is equipped with ridiculously wasteful spa showers that waste stupid amounts of water and energy then a recovery unit could make more sense.

1) Pool water can be corrosive - many heat pump pool heaters have titanium heat exchangers 2) Some kind of controlled switchover to a backup heat sink will need to occur when pool water is sufficiently warm as most systems in south reject far more heat than can be absorbed by a typical pool 3) Any scheme to reject pool heat at night would need to account for increased pool chlorine use https://www.heatair.org/