GSV3MiaC

The Grant r290 models appear to be rebadged Exinda, eg https://exindagroup.com/collections/r290-air-to-water-heat-pump Though the smart controller may be a home brew, can't find details of that on the exinda site. Has anyone actually used one yet? The spec looks good, especially the potential turn down ratio (under 30%), noise level, and power outputs at stupidly low ambient.