A heat pump’s performance and energy efficiency not only depend on the selection and planning of the equipment but also on careful installation.
Consumers and home builders alike tend to accept the lowest bid for heating and air-conditioning work. This unfortunate choice can often leave a system lacking 10 to 30 percent in the materials and labor necessary to optimize heat-pump performance. Rather than just accepting the lowest bid, it’s best to research the performance records of local contractors, and get involved in the planning and decision-making about your new heat pump system.
You can avoid most of the common comfort and performance problems from improper installation by following these guidelines:
New Energy-Efficient Heat Pumps
The efficiency and performance of today’s air-source heat pumps is one and-a-half to two times greater than those available 30 years ago. This improvement in efficiency has resulted from technical advances and options such as:
- Thermostatic expansion valves for more precise control of the refrigerant flow to the indoor coil
- Variable speed blowers, which are more efficient and can compensate for some of the adverse effects of restricted ducts, dirty filters, and dirty coils
- Improved coil design
- Improved electric motor and two-speed compressor designs
- Copper tubing, grooved inside to increase surface area.