This is a deliberately different view of the Casimir Force and Casimir Heat Con- duction. It is based on and supports the newly discovered physics of ‘Lateral Electromagnetic (EM) Coupling (LEC)’ which underpins the philosophy that in the final analysis “everything is, or can be shown to be, electromagnetic” [1–10]. It is not a quantum mechanical view. Both Casimir effects are viewed electromagnetically as processes that take place between surfaces that form the walls of a (micro-strip) waveguide cavity. The Casimir force is first considered as an imbalance of radiation pressure from ‘Natural spatial energy’. ‘Natural spatial energy’ is excluded from the waveguide gap d up to a cut-off frequency fc = c/2d. Natural spatial energy consists of thermal noise and Zero-Point-Energy, both of which have a white noise spectrum. Natural spatial energy is electromagnetic energy that exists in and is transported by the ‘fabric of space’, the ‘ether’ and it √ complies with the existence of free-space permeability µ0 permittivity ε0 and impedance Z0 = (µ0 /ε0 ). A useful but novel view and model of antenna thermal noise is put forward based on existing antenna and new [11] noise measurements. ZPE is assumed to behave the same way as spatial thermal noise. This simple ‘radiation pressure’ theory (like the virtual photon theory) predicts attraction and heat transport that is inversely proportional to the waveguide gap and both are much smaller than existing real measurements. Such radiation theories do not model any existing measurements with convincing accuracy. When we introduce the properties of ‘Lateral Electromagnetic Coupling’ (LEM) coupling to the surfaces of the waveguide walls we find that we can apply a novel EM coupling formula [2]. This coupling formula saturates to unity at defined short distances and then any desired negative of distance may be selected. We can also define layered combination of higher inverse powers of distances at which the attraction and heat conduction saturates. In each layer (or region) a single distance power law dominates with on account of the newly discovered and universally applicable RSS (Root-Sum-of-the-Squares) process combination law [1–10]. It has been shown [2] that at room temperature photons below about 300 THz or longer in wavelength than about 1 µm are not stable particles and evaporate into plane waves that are not quantised [2]. Thus the model and theory used here is not quantum-mechanical. It does not use the concept of ‘virtual photons’. The theory is consonant with and supports ‘The Physical EM Model of Everything’ [1].