As part of NRC's program for the development of solar heating standards and test methods, a facility has been established at the Division of Building Research to obtain data on the thermal performance and durability of solar collectors. A variety of solar collectors are being tested to determine the factors that affect their performance and life. A review of testing procedures is under way to assess their suitability for use in Canada. This note describes the solar calorimeter apparatus and the in-house activities currently being pursued at DBR.