Most furnaces and air conditioners nowadays are oversized or much bigger than needed. Back in the days, the heaters made to keep homes in cold climates warm needed up to 80,000 BTU/hr compared to now; the heating loads are much smaller while the models are twice as big as the most energy-efficient heater, and the BTU/hr are less as well. The less BTU/hr, the less efficient the HVAC is. However, the smaller the unit is, the more expensive.
There have been reports in the some states that homeowners are complaining that their homes have oversized furnaces which cause a longer time to turn on and when the thermostat detects that the heat is enough in one room, the heater for all rooms then turns off. Because some of the rooms are at the end of the duct, it takes a little while for the heater to work in some places. Most furnace sold today have small heat loads and isn’t enough to keep a room warm. A way to have an efficient heater would be to find one and customize the parts that come from competent repair centers, which can be a bit hard and problematic since there are no local suppliers and to obtain them, you’ll have to buy them from international sellers.
Small units 50% to 200% cost more than the standard units today. A tankless water heater would require an appliance that has a large burner to make it heat your home efficiently.
All solutions often include compromising something, but somehow you’ll end up choosing something that’s not so bad. Here are a series of questions that might help you find the right equipment:
- Do you have access to natural gas that you can use for a furnace or heater? If so, a domestic hot water and the heater would be enough to heat your home and rooms. Otherwise, electricity is your only means of heating but is the monthly charge worth paying?
- If you will use a water heater, what fuel will you choose? It would make more sense to use gas to heat up spaces as well.
- Is air conditioning necessary? If yes, then you might as well get an HVAC to have a heating option, as well, aside from conditioning.
- What type of ventilation will you get and what type of duct system will this system need?
- Choosing an electric-powered heating system
Homeowners prefer an electric-powered system that runs on propane or fuel if they don’t have access to natural gas. In some areas, a low-carbon electricity is still a big issue since electricity is a high carbon source and this makes a heat pump a good option to produce heat.
- If a house is well-insulated, two ductless mini splits are enough to heat up a room and home mainly empty spaces. However, the problem with this is that the installation might cost too much and connecting rooms might be a challenge. Another is that it might use too much electricity to keep rooms equally warm.
- Air to water heat pumps
An ideal appliance for most homeowners is affordable and efficient. What they are looking for might be an air-to-water heat pump, and it works in two ways, heats up water and rooms.
- Homes that have access to natural gas
If you have access to natural gas, then all you need is a small furnace but make sure to be careful in designing your ducts so that they won’t be too long. Systems with long ducts take longer take longer to cool rooms and unequally