Heating installation
I'm considering giving up traditional hydronic heating and installing an HVAC system based on a reversible heat pump and heat recovery ventilation, but I'm worried about whether such a solution will work in winter and how to correctly choose the unit's capacity. Is a forced-air system with air heating really more cost-effective and comfortable than classic plumbing, and where in the Lublin area can I find specialists who can properly design such an installation?
1 comment
to_503783
·1 month agoHydronic heating with any source is not a good idea these days. I’m going for HVAC. Reversible heat pumps that can heat and cool are definitely more efficient because they operate between smaller temperature differences. Water has to be heated to at least around 30°C, and when heating air directly, the pump’s upper source has room temperature. SCOP is above 5, which means every kilowatt of energy consumed turns into more than 5 kilowatts of heat. A split system works best for the living room, and ducted units for the bedrooms. You absolutely need ventilation recovery for this, because without it the cost of cooling and heating will be higher than 15kWh/m2, and comfort lower. On top of that, electric mats are installed under the floor in the soundproofing layer as a backup. They practically never turn on, because they’re only a safeguard for the coldest frosts to help the pump. The pump itself must not be oversized. Depending on the quality of the home’s insulation, 30, 40W/m2. The pump is not supposed to cope with severe frosts, because then at the higher temperatures we have for most of the year it will run in on-off mode, which lowers its efficiency and shortens its lifespan. For domestic hot water, electric heaters are best. If you have a bathtub and take baths, then a heat pump for domestic hot water. The whole HVAC system is cheapest to buy, cheapest to install, cheapest to run, and more comfortable. Unfortunately, not many people know much about it, which is why it’s hard to find
a well-executed installation. Most investors live in deep ignorance, going with wet plumbing, boiler rooms, and air-to-water heat pumps.