A rule of thumb for determining how much chimney you need for proper woodstove performance is…
The standard in water line is copper, always has been, but it is expensive and generally used in commercial applications and premium installations. Plastic water line is far more common and with the advances in pipe composition, almost as durable.
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Some manufacturers insist a roof over your heat pump is not necessary. However, in some cases where the unit may not be running consistently, snow can accumulate inside the unit and cause issues on startup. If you prefer not to install a shelter, you should ensure all snow is cleaned off the heat pump on a regular basis
Air source heat pumps are dependant on outside air temperature and become less efficient as the temperature drops. We recommend -10C as a set point where the heat pump should default to a backup heat source
