{"pageUrl":"https://www.vheatc.site/which-vaillant-heat-pumps-need-a-cooling-resistor","title":"Which Vaillant heat pumps need a cooling resistor?","lastModified":"2026-05-22","claims":[{"id":"arotherm-vwl-families","statement":"Vaillant’s cooling-capable air-source heat pumps are sold in the aroTHERM range under VWL model codes, including aroTHERM Plus and aroTHERM Split.","source":"Vaillant aroTHERM product documentation","hash":"sha256:fc512136589320b64cdc450c12aa9c4cbd0645561f2f085ba89aa181fcfb4044"},{"id":"s2-activation","statement":"Vaillant aroTHERM Split S2 units are designed so cooling can be activated later with an optional accessory.","source":"Vaillant aroTHERM Split documentation","hash":"sha256:8aa1f5b65c19ae4e9cea5d8055098158cec64584f028950b8e4636f0e1f1a0e3"},{"id":"flexotherm-conditional","statement":"Cooling on flexoTHERM and flexoCOMPACT ground-source heat pumps depends on the heat source arrangement, and Vaillant’s manuals place limits on cooling with a ground heat source.","source":"Vaillant flexoTHERM installer documentation","hash":"sha256:b50fe77d48e5ef380bc6b9d8a47166743ae76349a1423cceff69dabd4ce41f2a"}]}