tedkat you may and I emphasize may achieve better floor to floor temp constancy with a two stg condenser running on low stage for longer run times. However, I believe floor to floor temp constancy is more a function of good insulation qualities and properly sized ductwork design both supplies and particularly adequate returns. IMO

Chisue, I'd say 4K is probably not a bad bid. It is more expensive to retrofit than to install originally and it isn't quite as simple as just running some pipe under your existing floor. I don't see that the value of a 5K home in your neighborhood has much of impact on the conversation. From experience, the cost difference in many home retrofits and repairs in a high value RE value area, in the range you mention, and another in a low cost area, is not that much except when transportation costs of materials is at issue. In fact some services and inputs are more expensive in our lower home value area than in our higher value area, simply because more local trades that do higher end type installs are available and competing for work. From our experience we have to often hire someone from the nearby city --45 miles away -- to do the work and that does come at an up charge, understandably. There is also the fact that smaller jobs also cost proportionately more than larger jobs anywhere. It might help if you don't put down the trades as simpletons. If don't like the bid or can't afford that price, why don't you just go hire someone off the streets to install the tubing, direct the job yourself and just ask a master plumber to make a call to hook it up. LOL. Be sure to pull the correct building permit if ine is required -- it often is for additions to mechanical and plumbing systems.

The original kitchen had linoleum, and while planning our reno we debated between hardwood, laminate or porcelain tile. I hate having hot feet, so radiant heating has never been a consideration. I live in southwest British Columbia, so it doesn't get too cold, and our forced air ducting runs in the crawlspace beneath the kitchen, so the floors don't get that cold regardless.. Anyways, hubby, the kids love the ice machine in our fridge, and they are always dropping crushed ice. The kids are always having spills and the floor almost always has at least a drip of water here or there. It's a well used kitchen! Because of my concern about water, we ended up installing porcelain tiles. I have always been aware that I should wear shoes in the house because I have a mild foot deformity that is at risk of worsening without appropriate support, but I've always gone barefoot in my home. The tile changed that, my feet become painful if I don't wear my house slides if I'm spending the day baking, but I suppose it's a good thing for me to support my feet. Hubby has dealt with plantar fasciitis prior to changing the floor, so he always wears house shoes as well. We haven't noticed any pain in our hips or knees, but we are still quite young, and I'm sure wearing shoes helps with our alignment. Right after we installed our dishwasher on the new flooring, there was a big leak, and I'm glad I went with the tile! It's easy clean, I don't stress about the kids sliding their chairs and stools across it, and it's an attractive tile. I prefer the warmth of wood, but I know for our family, tile was the best choice, and we are willing to wear house shoes. I've brought wood into the kitchen in different ways, with the stools, utensil "pots", cutting boards, etc.. There will always be pros and cons, you just need to decide which has the least cons and the best pros for your situation :). Also, when you are considering cost, find out if you need to install subfloor. We ended up having to install ditra, which definitely added to the cost. Good luck making your decision.

If the house is designed to current IECC energy codes or better, the 1st level radiant could probably handle most of the home's heating loads including 2nd level. If upfront costs and operating costs are important, you may want to reconsider radiant floors and propane as main energy source. Here is [recent thread on propane[(https://www.houzz.com/discussions/energy-star-most-efficient-2019-boilers-help-reading-the-stats-dsvw-vd~5649781?n=36) boilers. To summarize, propane is the most expensive common fuel. It would cost less to heat your home using electricity, as long as you choose high efficiency heat pump options. Cold climate heat pumps are available for your climate so choose a contractor who is comfortable with them and follow their guidance on any needed backup. Tough to beat woodstove with frequent power outages. Radiant only provides heating so it's a tougher choice if the upgrade costs are worthwhile in your climate. Cold climate heat pumps can satisfy heating needs with generally less upfront costs. Ductless heat pumps are packaged systems that are easy to install. Providing sweat equity for radiant floors will be needed to compete in upfront costs. Tubing, manifolds, pumps, appliances, controls, pipes, all done in custom snowflake fashion. Giant propane tank, piped fos$il fuels into house, combustion exhaust to expel, hopefully not backdraft. Most people choosing radiant are going off experience based on inefficient homes. Building to current codes changes the comfort dynamic and some find radiant less comfortable due to thermostat delay response. Radiant floors rarely make economic sense for efficient homes.